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⇱ Fergusonite-(Y): Mineral information, data and localities.


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Fergusonite-(Y)

A valid IMA mineral species - grandfathered
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About Fergusonite-(Y)Hide

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Formula:
YNbO4
Colour:
Grey, yellow, brown
Lustre:
Vitreous, Sub-Metallic, Dull
Hardness:
5½ - 6½
Specific Gravity:
5.6 - 5.8
Crystal System:
Tetragonal
Name:
Named fergusonite after Robert Ferguson (8 September 1769 – 3 December 1840, London, England), Scottish landowner, politician and mineral collector. The suffix was added in 1987 to conform to the Levinson rule for minerals with essential REE, in this case yttrium.
Compare also the chemically similar euxenite-(Y) and nioboaeschynite-(Y).


Unique IdentifiersHide

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Mindat ID:
1480
Long-form identifier:
mindat:1:1:1480:5

Similar NamesHide

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IMA Classification of Fergusonite-(Y)Hide

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Approved, 'Grandfathered' (first described prior to 1959)
First published:
1825

Classification of Fergusonite-(Y)Hide

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7.GA.05

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
A : Without additional anions or H2O
8.1.1.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
18.2.1

18 : Niobates and Tantalates
2 : Niobates and tantalates containing rare earths but not U

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
Fgs-YIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
FgsThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of Fergusonite-(Y)Hide

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Vitreous, Sub-Metallic, Dull
Transparency:
Opaque
Colour:
Grey, yellow, brown
Comment:
Brownish black when altered, brown in transmitted light.
Streak:
Brown, yellow brown, greenish gray
Hardness:
5½ - 6½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Poor on {111}
Fracture:
Sub-Conchoidal
Density:
5.6 - 5.8 g/cm3 (Measured)    5.65 g/cm3 (Calculated)

Optical Data of Fergusonite-(Y)Hide

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Type:
Isotropic
RI values:
n = 2.05 - 2.19
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Very High
Comments:
Rarely uniaxial

Chemistry of Fergusonite-(Y)Hide

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Mindat Formula:
YNbO4
Element Weights:
Element% weight
Nb37.796 %
Y36.169 %
O26.035 %

Calculated from ideal end-member formula.

Chemical AnalysisHide

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Crystallography of Fergusonite-(Y)Hide

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Crystal System:
Tetragonal
Class (H-M):
4/m - Dipyramidal
Space Group:
I41/a
Cell Parameters:
a = 5.15 Å, c = 10.089 Å
Ratio:
a:c = 1 : 1.959
Unit Cell V:
267.59 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Prismatic to acicular dipyramidal crystals to 20cm.
Comment:
Commonly metamict

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005036Fergusonite-(Y)Guastoni A, Camara F, Nestola F (2010) Arsenic-rich fergusonite-beta-(Y) from Mount Cervandone (Western Alps, Italy): Crystal structure and genetic implications American Mineralogist 95 487-494👁 Image
2010Mount Cervandone, Western Alps, Italy0293
0015538Fergusonite-(Y)Komkov A I (1959) The structure of natural fergusonite, and a polymorphic modification Soviet Physics Crystallography 4 796-8001959Ural Mountains, Russia0293
0015539Fergusonite-(Y)Komkov A I (1959) The structure of natural fergusonite, and of a polymorphic modification Soviet Physics Crystallography 4 796-8001959Ural Mountains, Russia01273
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:
d-spacingIntensity
3.12 Å(100)
2.96 Å(90)
1.901 Å(50)
2.74 Å(40)
1.855 Å(30)
3.01 Å(20)
2.64 Å(20)
Comments:
Madawaska, Ontario, Canada. Data from Berman (1955). Collected after heating sample at 1200°C.

Geological EnvironmentHide

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Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
26 : Hadean detrital minerals
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites
Geological Setting:
Rare earth bearing pegmatites, placer deposits.

Type Occurrence of Fergusonite-(Y)Hide

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General Appearance of Type Material:
Crystals, embedded in quartz.
Place of Conservation of Type Material:
No designated type material.
Associated Minerals at Type Locality:

Synonyms of Fergusonite-(Y)Hide

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Other Language Names for Fergusonite-(Y)Hide

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Varieties of Fergusonite-(Y)Hide

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RisöriteA Ti-bearing (up to 5 mass% TiO2) variety of Fergusonite-(Y).

Common AssociatesHide

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Associated Minerals Based on Photo Data:
28 photos of Fergusonite-(Y) associated with ZirconZr(SiO4)
23 photos of Fergusonite-(Y) associated with BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
13 photos of Fergusonite-(Y) associated with QuartzSiO2
12 photos of Fergusonite-(Y) associated with CyrtoliteZr[(SiO4),(OH)4]
10 photos of Fergusonite-(Y) associated with PyriteFeS2
9 photos of Fergusonite-(Y) associated with FluoriteCaF2
7 photos of Fergusonite-(Y) associated with AlbiteNa(AlSi3O8)
7 photos of Fergusonite-(Y) associated with MicroclineK(AlSi3O8)
6 photos of Fergusonite-(Y) associated with UraniniteUO2
5 photos of Fergusonite-(Y) associated with K Feldspar

Related Minerals - Strunz-mindat GroupingHide

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7.GA.YunhaoiteK2(MoO4)Mon. 2/m : B2/m
7.GA.05RonpetersoniteBaWO4Tet. 4/m : I41/a
7.GA.05Fergusonite-(Ce)CeNbO4 · 0.3H2OTet.
7.GA.05Fergusonite-(Nd)NdNbO4
7.GA.05PowelliteCa(MoO4)Tet. 4/m : I41/a
7.GA.05StolzitePb(WO4)Tet. 4/m : I41/a
7.GA.05SuseinargiuiteNaBi(MoO4)2Tet. 4/m : I41/a
7.GA.05WulfenitePb(MoO4)Tet. 4/m : I41/a
7.GA.05ScheeliteCa(WO4)Tet. 4/m : I41/a
7.GA.10Formanite-(Y)YTaO4Tet. 4/m : I41/a
7.GA.10Iwashiroite-(Y)Y(Ta,Nb)O4Mon. 2/m : P2/b
7.GA.15Paraniite-(Y)Ca2Y(AsO4)(WO4)2Tet. 4/m : I41/a
7.GA.20Takanawaite-(Y)YTaO4Mon. 2/m

Other InformationHide

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Thermal Behaviour:
Before the blowpipe, infusible, but it loses its colour and becomes pale greenish-yellow.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Fergusonite-(Y)Hide

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References for Fergusonite-(Y)Hide

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Localities for Fergusonite-(Y)Hide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 👁 Image
symbol to view information about a locality. The 👁 Image
symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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👁 Image
- This locality has map coordinates listed.
👁 Image
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species.
👁 Image
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Argentina
  • La Rioja Province
    • Sanagasta department
Bardelli et al. (2018)
Australia
  • South Australia
    • Pastoral Unincorporated Area
      • Moolawatana Station (Moolawatana)
        • Mt Babbage area (Inlier)
PA Wulser - unpublished data
  • Western Australia
    • Mukinbudin Shire
      • Mukinbudin
Calderwood +2 other references
Calderwood +3 other references
Austria
  • Lower Austria
    • Neunkirchen District
      • Gloggnitz
Kolitsch et al. (2018)
  • Salzburg
    • Zell am See District
      • Neukirchen am Großvenediger
        • Hopffeld area
Exel (1993)
  • Tyrol
    • Schwaz District
      • Finkenberg
        • Schrammacher
Folie et al. (1999)
M. Moro collection
Brazil
  • Amazonas
    • Presidente Figueiredo
      • Pitinga mine
Hadlich et al. (2024)
  • Goiás
    • Minaçu
Zapata Montoya et al. (2026)
  • Minas Gerais
Ricardo Augusto Cipriano Scholz. UFOP (Federal University of Ouro Preto, Brazil) +1 other reference
  • São Paulo
    • Ilhabela
      • Búzios island
de Barros Gomes et al. (2017)
Canada
  • Northwest Territories
    • Blachford Lake alkaline complex
Sheard et al. (2012)
    • North Slave Region
      • Blachford Lake alkaline complex
        • Thor Lake syenite complex
Pinckston et al. (1995) +3 other references
Ercit et al. (2003)
  • Ontario
    • Haliburton County
      • Highlands East Township
        • Cardiff Township
    • Hastings County
      • Faraday Township
Daniel Hummer Collection
      • Hastings Highlands Municipality
        • Monteagle Township
Ercit (1994)
    • Nipissing District
      • Murchison Township
Dana's New Mineralogy +1 other reference
    • Thunder Bay District
Mitchell et al. (1993)
  • Québec
    • Nord-du-Québec
      • Nunavik
Petrella (2013)
    • Outaouais
      • Les Collines-de-l'Outaouais RCM
        • Val-des-Monts
          • Saint-Pierre-de-Wakefield
            • Lake Saint-Pierre
M et al. (1971)
Hilderley et al. (2006)
China
  • Anhui
    • Huangshan
      • She Co.
Duan et al. (2025)
  • Guangdong
    • Qingyuan
      • Fogang County
Zhenhai Wang (2000)
  • Guangxi
    • Liuzhou
      • Rong'an Co.
        • Huashan Sn ore field
Zhiwei Bao and Zhenhua Zhao (2008)
  • Hunan
    • Hengyang
      • Leiyang Co.
Zhijun Shen et al. (2003) +2 other references
    • Yongzhou
      • Jianghua Co.
        • Guposhan Sn-polymetallic ore field
Zhijun Shen et al. (2003) +1 other reference
Zhijun Shen et al. (2003)
  • Inner Mongolia
    • Baotou City (Baotou Prefecture)
      • Bayan Obo mining district
        • Bayan Obo
Qingchang Meng (1981) +1 other reference
      • Darhan Muminggan United Banner (Da'erhan Maoming'an Lianheqi; Damaoqi)
Lei et al. (2025)
  • Jiangxi
    • Ganzhou
      • Anyuan Co.
Cao et al. (2024)
      • Chongyi Co.
Jili Shen (1988)
      • Dayu Co.
Rucheng Wang et al. (2003)
      • Dingnan Co.
Shi et al. (2024)
      • Longnan Co.
Yunhuai Lin and Shiyang Chen (1985)
Shi et al. (2024)
    • Ji'an
      • Suichuan Co.
Weizheng Hu et al. (2005)
  • Liaoning
Pavel.M. Kartashov (n.d.)
  • Sichuan
    • Liangshan Yi
      • Dechang County
Zhang Peishan et al. (1996)
      • Huili County
Fenlian Wang et al. (2012) +1 other reference
Xue et al. (2021)
    • Panzhihua
      • Yanbian County
Fenlian Wang et al. (2012)
  • Xinjiang
    • Akesu Prefecture
      • Baicheng Co.
Yin et al. (2015)
Czech Republic
  • Central Bohemian Region
    • Rakovník District
      • Čistá
Jaranowski et al. (2025)
  • South Bohemian Region
    • Písek District
Škoda et al. (2011)
  • Vysočina Region
    • Třebíč District
      • Stařeč
Škoda +2 other references
Egypt
  • Red Sea Governorate
Sami et al. (2025)
Sami et al. (2017) +1 other reference
    • Wadi Sikait
Elsagheer et al. (2025)
Finland
  • Kainuu
    • Kajaani
Al-Ani et al. (2018)
      • Otanmäki granite
Thair Al-Ani! and Olli Sarapää (2013)
  • Lapland
    • Enontekiö
      • Miessijoki River
Tuisku (2010)
  • North Ostrobothnia
    • Pyhäntä
Al Ani Thair and Torppa Akseli 2011. ...
  • Pirkanmaa
    • Valkeakoski
Vorma et al. (1966)
France
  • Nouvelle-Aquitaine
    • Pyrénées-Atlantiques
      • Oloron-Sainte-Marie
        • Aramits
          • Ance
MONCHOUX P. et al. (2006)
MONCHOUX P. et al. (2006)
Germany
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mendig
        • Mendig
Blaß et al. (1994)
Blaß et al. (1994)
          • Wingertsberg
Blaß et al. (1994)
      • Pellenz
        • Kruft
Blaß et al. (1994)
      • Vordereifel
        • Ettringen
Blaß et al. (2004)
  • Saxony
    • Görlitz District
      • Königshain
Witzke et al. (2013)
Greenland
  • Kujalleq
    • Ilímaussaq complex
      • Kangerluarsuk Fjord
Anouk Borst photo 782272
    • Sermersooq Island
Haidinger W (1825) +1 other reference
Italy
  • Aosta Valley
    • Courmayeur
Piccoli et al. (2007)
  • Liguria
    • Savona Province
      • Magliolo
Balestra et al. (2011)
  • Piedmont
    • Metropolitan City of Turin
Finello et al. (2007)
    • Verbano-Cusio-Ossola Province
      • Beura-Cardezza
Preite et al. (1997)
      • Craveggia
        • Rio Vasca
Piccoli et al. (2007)
      • Trontano
Piccoli et al. (2007)
      • Varzo
        • Veglia Alp (Alpe Veglia)
Cuchet et al. (2016) +2 other references
Cuchet et al. (2023)
Cuchet et al. (2016) +1 other reference
Cuchet et al. (2023)
Cuchet et al. (2023)
  • Trentino-Alto Adige/Südtirol
    • South Tyrol
      • Wipptal (Alta Vall'Isarco)
        • Pfitsch (Val di Vizze)
          • Sankt Jakob (San Giacomo)
            • Vizze Pass (Pfitsch Pass; Pfitscher Joch)
Buscaroli et al. (1994)
    • Trento Province
      • Predazzo
Vecchi et al. (2013)
Japan
  • Fukushima Prefecture
    • Date District
      • Kawamata
National Science Museum specimens (Tokyo) +1 other reference
        • Iizaka Village (Iisaka)
Kotaro Watanabe specimens. +2 other references
    • Ishikawa District
      • Ishikawa town (Ishikawa-machi)
        • Nekonaki
Koji Koseki & Hanzo Gohara (1956)
Koji Koseki & Hanzo Gohara (1956)
Koji Koseki & Hanzo Gohara (1956)
    • Koriyama City
Matsubara et al. (2013)
  • Gifu Prefecture
    • Nakatsugawa City
John Rakovan (2015)
  • Ibaraki Prefecture
    • Takahagi City
Nagashima (1960)
  • Mie Prefecture
    • Tsu City
Otokichi NAGASHIMA
  • Miyagi Prefecture
    • Igu District
      • Marumori
Omori et al. (1957)
Omori et al. (1957)
Omori et al. (1957)
  • Miyazaki Prefecture
    • Nobeoka City
      • Ohkueyama (Okueyama)
Okada (2011)
  • Shiga Prefecture
    • Otsu City
Nakatsugawa Mineral Museum (Gifu Prefecture, Japan)
Kazakhstan
  • Abai Region
    • Tarbagatai Range
      • Akzhaylyautas Mts (Akzhailyautas Mts; Akjaylautas Mts; Akzhalautas Mts)
Stepanov et al. (2012)
Madagascar
  • Analamanga
    • Anjozorobe District
      • Beronono Commune
Behier (1963)
  • Diana
    • Ambanja District
      • Antsirabe
Estrade (2014)
Estrade et al. (2014)
  • Itasy
    • Soavinandriana District
      • Mahavelona
Betts (n.d.)
  • Vakinankaratra
    • Antsirabe II District
      • Ibity
        • Sahatany Valley
Knut Edvard Larsen collection # MM- 3943
Shen (n.d.)
      • Anosiarivo Manapa
        • Manapa pegmatite Field
Lavinsky (n.d.)
Knut Edvard Larsen collection # MM-1585 (from near Faratsiho)
Malawi
  • Southern Region
    • Zomba
Cairncross et al. (1999) +1 other reference
Mexico
  • Chihuahua
    • Aldama Municipality
      • Puerto del Aire
Panczner (1987)
  • Oaxaca
    • la San Francisco Telixtlahuaca Municipality
      • San Francisco Telixtlahuaca
Panczner (1987)
    • San Francisco Telixtlahuaca Municipality
      • San Francisco Telixtlahuaca
Prol-Ledesma et al. (2012)
Mongolia
  • Khovd Province
    • Myangad District
Pavel.M. Kartashov (n.d.) +2 other references
        • Mount Ulyn Khuren
Can Min 40:1641-1648
Pavel.M. Kartashov (n.d.)
Kartashov P.M. et al. (Mongolian Altai)
Pavel.M. Kartashov (n.d.) +5 other references
Myanmar
  • Mandalay Region
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Kyauk-Pyat-That
          • Thurein-taung
Pavel M. Kartashov analytical data
North Korea
  • Kangwon Province
    • Pyonggang County
Pavel.M. Kartashov (n.d.)
Norway
  • Agder
    • Evje og Hornnes
      • Landsverk
Brøgger (1906) +1 other reference
      • Lauvland
Frigstad (1968)
Frigstad (1968)
Stensrud (2009)
        • Skavdalen
Stensrud (2009)
Stensrud (2009)
    • Froland
Brøgger (1906)
Nilssen (1970)
    • Gjerstad
Hauser (1908) +1 other reference
    • Iveland
Pavel.M. Kartashov (n.d.)
      • Birketveit
Stensrud (2009)
Stensrud (2009)
      • Frikstad
Revheim (2007)
Stensrud (2009)
      • Frøyså
- (n.d.)
Collection of Iveland Municipality # ...
      • Ljosland
Breivik et al. (2010)
      • Mølland
Stensrud (2009)
Lund (2016)
    • Risør
Brøgger (1906)
  • Buskerud
    • Øvre Eiker
      • Gunhildrud
Jahren et al. (1998)
  • Nordland
    • Hamarøy
Husdal (2023)
    • Narvik
Vogt (1911)
Husdal (2008)
    • Sørfold
Ellingsen et al. (1995)
  • Østfold
    • Moss
      • Dillingøya (Dillingö)
Brøgger (1906)
Bjørlykke (1939)
        • Tolåsen
Brøgger (1906)
Brøgger (1906)
    • Råde
Brøgger (1906)
Brøgger (1906) +1 other reference
Brøgger (1906)
  • Telemark
    • Bamble
      • Skogstad
Larsen et al. (2016)
    • Drangedal
      • Tørdal
Raade et al. (1993)
    • Nome
Åmli (1974)
    • Porsgrunn
      • Bjørkedalen
Andersen et al. (1996) +1 other reference
    • Siljan
      • Holtesletta
Larsen (2021)
Poland
  • Lower Silesian Voivodeship
    • Dzierżoniów County
      • Piława Górna
        • DSS Piława Górna Quarry
SZUSZKIEWICZ et al. (2013)
    • Jawor County
      • Gmina Paszowice
SZEŁĘG E. (2004)
    • Jelenia Góra
Cegiełka et al. (2018)
    • Karkonosze County
      • Gmina Mysłakowice
        • Karpniki
Matyszczak (2018)
Matyszczak (2018)
        • Krogulec
Matyszczak (2018)
      • Gmina Podgórzyn
        • Sosnówka
Matyszczak (2018)
Matyszczak (2018)
        • Zachełmie
Matyszczak (2018)
Kozłowski et al. (2016)
      • Piechowice
Lis et al. (1986)
      • Szklarska Poręba
Matyszczak (2018)
Szełęg E. and Škoda R. (2008)
Pieczka A. +1 other reference
Portugal
  • Azores
    • São Miguel
Ternes (1999)
      • Ribeira Grande
Ternes (1999)
      • Vila Franca do Campo
Alves (n.d.)
Romania
  • Harghita County
    • Ditrău Complex
Szakáll et al. (2010)
Russia
  • Chelyabinsk Oblast
    • Argayashsky District
Am. Min. 90:1402-1412 (2005)
    • Ilmen Mountains
Dana 7:I:761. +1 other reference
    • Kaslinsky District
      • Kasli
webmineral.ru (2021)
    • Kyshtym
Kasatkin et al. (2020)
    • Miass
Pavel.M. Kartashov (n.d.)
  • Irkutsk Oblast
Savel'eva V.B. Karmanov N.S. (2008) +1 other reference
  • Murmansk Oblast
    • Belye Tundry Massif
Voloshin et al. (2005) +1 other reference
...
    • Lovozersky District
      • Keivy Mountains
Pavel.M. Kartashov (n.d.)
Zozulya +5 other references
Voloshin A.V. et al. (1986)
Kalashnikov et al. (2016)
Pavel.M. Kartashov (n.d.) +1 other reference
Pavel.M. Kartashov (n.d.)
Zozulya et al. (2022)
Kalashnikov et al. (2016)
    • Northern Karelia
Pekov (1998)
  • Sakha
    • Selennyakh range
      • Tommot river
Pavel.M. Kartashov (n.d.)
  • Sverdlovsk Oblast
    • Serovsky District
      • Turya river
        • Tur'insk
Kasatkin et al. (2021)
  • Tuva
    • Sangilen Upland
Kapustin Yu.L. (1989)
    • Todzhinsky District
Pavel.M. Kartashov (n.d.)
  • Yamalo-Nenets Autonomous Okrug
    • Labytnangi
Pekov (1998)
  • Zabaykalsky Krai
    • Kalarsky District
Victor V. Sharygin analytycal data (2012)
Rwanda
  • Western Province
    • Ngororero District
      • Muhororo
Bertossa (1968) +1 other reference
Saudi Arabia
  • Tabuk Region
    • Midyan
Küster (2009) +1 other reference
Slovakia
  • Košice Region
    • Rožňava District
Koděra (1986)
South Africa
  • North West
    • Bojanala Platinum District Municipality
      • Moses Kotane Local Municipality
        • Pilanesberg Alkaline Ring Complex
  • Northern Cape
    • Namakwa District Municipality
      • Kamiesberg Local Municipality
Cairncross et al. (1995)
    • ZF Mgcawu District Municipality
      • Dawid Kruiper Local Municipality
Cairncross et al. (1995)
      • Kai !Garib Local Municipality
Cairncross et al. (1995)
South Korea
  • North Chungcheong Province
    • Chungju City
      • Joongwon-gun
        • Mt. Eorae
Pavel.M. Kartashov (n.d.)
Spain
  • Canary Islands
    • Santa Cruz de Tenerife Province
      • Tenerife
Dill et al. (2023)
Dill et al. (2023)
Sri Lanka
  • Sabaragamuwa Province
    • Ratnapura District
      • Ratnapura
        • Gem gravels
Fersman Mineralogical Museum (cat. no. 11267)
Sweden
  • Dalarna County
    • Gagnef
      • Mockfjärd
    • Säter
      • St. Skedevi
  • Jämtland County
    • Bräcke
Kjellman et al. (1999)
  • Jönköping County
    • Vetlanda
      • Alseda
Swedish Nat.Musuem
  • Norrbotten County
    • Jokkmokk
      • Varjisträsk
    • Luleå
      • Råneå
Pavel M. Kartashov data
  • Stockholm County
    • Norrtälje
      • Väddö
Wilke (1997)
Wilke (1997)
    • Nynäshamn
Gustafsson et al. (1991)
    • Vaxholm
      • Resarö
Riksmuseet Stockholm specimen
  • Värmland County
    • Årjäng
Wedding (1989)
    • Filipstad
      • Persberg ore district
  • Västmanland County
    • Norberg
      • Getback ore field
Andersson et al. (2024) +1 other reference
    • Skinnskatteberg
      • Riddarhyttan
Andersson et al. (2024)
Andersson et al. (2024)
Switzerland
  • Valais
    • Brig
      • Brig-Glis
        • Nessel Valley
Cuchet et al. (2023)
    • Goms
      • Binn
M. Praeger and M. Crumbach: Lapis 29 (7/8) +2 other references
    • Hérens
      • Vex
        • Thyon
Stalder et al. (1998)
    • Östlich Raron
      • Grengiols
        • Chummibort
Cuchet et al. (2014) +1 other reference
Cuchet et al. (2014)
Tajikistan
  • Districts of Republican Subordination
I. Pekov data pers. comm L. Horvath 2008
UK
  • Northern Ireland
    • County Down
      • Mourne Mountains
Norman R. Moles and Andrew G. Tindle (2011)
Norman R. Moles and Andrew G. Tindle (2011)
  • Scotland
    • Highland
      • Eilean á Chèo
        • Isle of Skye
          • Luib
S Rust collection
USA
  • Colorado
    • Douglas County
Eckel et al. (1997)
    • El Paso County
Eckel et al. (1997)
    • Fremont County
Eckel et al. (1997)
    • Gunnison County
      • Quartz Creek Pegmatite Mining District
Miller
    • Jefferson County
      • Clear Creek pegmatite Province
Eckel et al. (1997)
      • South Platte Pegmatite Mining District
Eckel et al. (1997)
Eckel et al. (1997)
Eckel et al. (1997)
Eckel et al. (1997)
Eckel et al. (1997)
    • Teller County
Eckel et al. (1997)
  • Idaho
    • Boise County
      • Idaho City Mining District
Ream (2004)
  • Maine
    • Sagadahoc County
      • Topsham
        • Standpipe Hill Quarries
King et al. (1994) +1 other reference
  • Massachusetts
    • Essex County
...
  • Nevada
    • Pershing County
      • Antelope Mining District
Castor et al. (2004)
  • New Hampshire
    • Carroll County
Robert Janules
  • New York
    • Essex County
      • Crown Point Township
        • Crown Point Center
M.V. Lupulescu et al. (2011)
    • Saratoga County
      • Overlook
Marian Lupulescu (2010)
  • North Carolina
    • Burke County
      • Brindletown
Bernard et al. (2004)
    • Mitchell County
      • Spruce Pine
        • Greasy Creek Township
Warner et al. (2009)
Warner et al. (2009)
...
  • Texas
    • Llano County
      • Bluffton
American Mineralogist (1925)
      • Kingsland Granite Company Quarry (Petrick Quarry)
Arthur Smith et al. (2008)
  • Virginia
    • Amelia County
      • Winterham
Kearns et al. (2016)
  • Wisconsin
    • Marathon County
      • Wausau Intrusive Complex
Hanson et al. (1999)
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