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⇱ Franksousaite: Mineral information, data and localities.

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Franksousaite

A valid IMA mineral species
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About FranksousaiteHide

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Formula:
PbCu(Se6+O4)(OH)2
Colour:
Blue
Lustre:
Vitreous
Hardness:
2 - 2½
Specific Gravity:
5.64 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honour of Mr. Francis (Frank) X. Sousa (b. 1951), of Tuscon, Arizona, USA. Frank's interest in minerals began at age 9 and he started collecting minerals, especially Pb-bearing minerals, in his teenage years. He is a strong promoter of mineral collecting and is a dedicated volunteer, including at multiple Arizona museums.
The Se(VI) analogue of linarite. Chemically most similar to schmiederite.


Unique IdentifiersHide

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Mindat ID:
55765
Long-form identifier:
mindat:1:1:55765:6

IMA Classification of FranksousaiteHide

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Approved
First published:
2022

Classification of FranksousaiteHide

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7.BC.65

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations

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.

SymbolSourceReference for Standard
FnsIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of FranksousaiteHide

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Vitreous
Transparency:
Transparent
Colour:
Blue
Streak:
Very pale blue
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Cleavage could not be determined due to the small crystal size. By its structural analogue to linarite, it should have perfect cleavage on {100}.
Density:
5.64 g/cm3 (Calculated)

Chemistry of FranksousaiteHide

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Mindat Formula:
PbCu(Se6+O4)(OH)2
Element Weights:
Element% weight
Pb46.279 %
O21.441 %
Se17.636 %
Cu14.193 %
H0.450 %

Calculated from ideal end-member formula.

Crystallography of FranksousaiteHide

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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 9.8208(3) Å, b = 5.7340(2) Å, c = 4.7498(1) Å
β = 102.683(2)°
Ratio:
a:b:c = 1.713 : 1 : 0.828
Unit Cell V:
260.95 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

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Powder Diffraction Data:
d-spacingIntensity
9.548 Å(22)
4.917 Å(24)
4.578 Å(35)
3.602 Å(60)
3.193 Å(100)
3.150 Å(50)
2.621 Å(21)
1.828 Å(21)

Type Occurrence of FranksousaiteHide

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General Appearance of Type Material:
Prismatic crystals included in colourless anglesite. Individual crystals of franksousaite are found up to 0.05 × 0.02 × 0.02 mm.
Place of Conservation of Type Material:
Collections of (1) the University of Arizona Gem and Mineral Museum, 115 N Church Ave., Tucson, AZ 85701, USA, catalogue number 22713 (holotype), and (2) the RRUFF Project, deposition number R210012 (cotype).
Geological Setting of Type Material:
Telethermal deposit consisting of a single selenide vein hosted in sandstones and shales.
Associated Minerals at Type Locality:

Synonyms of FranksousaiteHide

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Other Language Names for FranksousaiteHide

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Relationship of Franksousaite to other SpeciesHide

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Other Members of Linarite-Chenite Group:
ChenitePb4Cu(SO4)2(OH)6Tric. 1 : P1
LinaritePbCu(SO4)(OH)2Mon. 2/m : P21/m
MunakataitePb2Cu2(Se4+O3)(SO4)(OH)4Mon. 2/m : P21/m
SchmiederitePb2Cu2(Se6+O4)(Se4+O3)(OH)4Mon. 2/m : P21/m

Common AssociatesHide

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Associated Minerals Based on Photo Data:
1 photo of Franksousaite associated with AnglesitePbSO4

Related Minerals - Strunz-mindat GroupingHide

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7.BC.ViskontitePb5Cu2(SO4)3(SeO3)(OH)6Orth. mm2 : Pmn21
7.BC.ZincochenitePb4Zn(OH)6(SO4)2Tric. 1 : P1
7.BC.D'Ansite-(Mn)Na21Mn2+(SO4)10Cl3Iso. 43m : I43d
7.BC.D'Ansite-(Fe)Na21Fe2+(SO4)10Cl3Iso. 43m : I43d
7.BC.Acmonidesite(NH4,K,Pb)8NaFe2+4(SO4)5Cl8Orth. 222 : C2221
7.BC.Adranosite(NH4)4NaAl2(SO4)4Cl(OH)2Tet. 4/mmm(4/m2/m2/m) : I41/acd
7.BC.ChromviskontitePb5Cu2(CrO4)3(SeO3)(OH)6Orth. mm2 : Pmn21
7.BC.BackitePb2AlTeO6ClTrig. 32 : P312
7.BC.Adranosite-(Fe)(NH4)4NaFe3+2(SO4)4Cl(OH)2Tet. 4/mmm(4/m2/m2/m) : I41/acd
7.BC.AgaitePb3CuTeO5(OH)2(CO3) Orth. mm2 : Pca21
7.BC.WildcatiteCaFe3+Te6+O5(OH)Trig. 3m(32/m) : P31m
7.BC.HagstromitePb8Cu2+(Te6+O6)2(CO3)Cl4Orth. mmm(2/m2/m2/m) : Ibam
7.BC.05D'AnsiteNa21Mg(SO4)10Cl3Iso. 43m : I43m
7.BC.07'Apatelite'Fe3(SO4)2(OH)5 · 0.5H2O
7.BC.07'Unnamed (Ba-Fe Vanadate)'Ba, Fe, V, O, H
7.BC.10JarositeKFe3+3(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10DorallchariteTlFe3+3(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10ArgentojarositeAgFe3+3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10NatroaluniteNaAl3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10Beaverite-(Zn)Pb(Fe3+2Zn)(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10WalthieriteBa0.5Al3(SO4)2(OH)6Trig.
7.BC.10HuangiteCa0.5Al3(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10'Natroalunite-2c'(Na,Ca0.5,K)Al3(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10AluniteKAl3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10PlumbojarositePb0.5Fe3+3(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10Karlseifertite Pb(Ga2Ge)(AsO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10Hydroniumjarosite(H3O)Fe3+3(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10Ammonioalunite(NH4)Al3(SO4)2(OH)6Trig.
7.BC.10Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.10Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig. 3m(32/m) : R3m
7.BC.15Ye'elimiteCa4Al6(SO4)O12Iso. 432 : I4132
7.BC.20NabokoiteKCu7(SO4)5(Te4+O3)OClTet. 4/mmm(4/m2/m2/m) : P4/ncc
7.BC.20PuniniteNa2Cu3O(SO4)3Mon. 2/m : B2/b
7.BC.20AtlasoviteK(BiO)Cu6Fe3+(SO4)5O3ClTet. 4/mmm(4/m2/m2/m) : P4/ncc
7.BC.25ChlorothioniteK2Cu(SO4)Cl2Orth. mmm(2/m2/m2/m) : Pnma
7.BC.30EuchlorineKNaCu3(SO4)3OMon. 2/m
7.BC.30FedotoviteK2Cu3(SO4)3OMon. 2/m : B2/b
7.BC.35KamchatkiteKCu3(SO4)2OClOrth. mmm(2/m2/m2/m) : Pnma
7.BC.40PiypiteK4Cu4O2(SO4)4 · (Na,Cu)ClTet. 4 : I4
7.BC.45AlumoklyuchevskiteK3Cu3(Al,Fe3+)(SO4)4O2Tric. 1 : P1
7.BC.45BelousoviteKZn(SO4)ClMon. 2/m : P21/b
7.BC.45KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2Mon. 2
7.BC.47MülleritePb2Fe3+(Te6+O6)ClTrig. 32 : P3112
7.BC.50CaledonitePb5Cu2(SO4)3(CO3)(OH)6Orth. mm2 : Pmn21
7.BC.50ElasmochloiteNa3Cu6BiO4(SO4)5Mon. 2/m
7.BC.52Eleomelanite(K2Pb)Cu4O2(SO4)4Mon. 2/m
7.BC.55FalgariteK4(VO)3(SO4)5Mon. 2/m : B2/b
7.BC.55WherryitePb7Cu2(SO4)4(SiO4)2(OH)2Mon. 2/m : B2/m
7.BC.57KrasheninnikoviteKNa2CaMg(SO4)3FHex. 6/mmm(6/m2/m2/m) : P63/mcm
7.BC.60WulffiteK3NaCu4O2(SO4)4Orth. mm2
7.BC.60ParawulffiteK5Na3Cu8O4(SO4)8Mon. 2/m : P2/b
7.BC.60MammothitePb6Cu4AlSb5+O2(OH)16Cl4(SO4)2Mon. 2 : B2
7.BC.62ShuvaloviteK2(Ca2Na)(SO4)3FOrth. mmm(2/m2/m2/m) : Pnma
7.BC.65SaccoiteCa2Mn3+2F(OH)8 · 0.5(SO4)Tet. 4/mmm(4/m2/m2/m) : P4/ncc
7.BC.65LinaritePbCu(SO4)(OH)2Mon. 2/m : P21/m
7.BC.65Therasiaite(NH4)3KNa2Fe2+Fe3+(SO4)3Cl5Mon. m : Bb
7.BC.65MunakataitePb2Cu2(Se4+O3)(SO4)(OH)4Mon. 2/m : P21/m
7.BC.65SchmiederitePb2Cu2(Se6+O4)(Se4+O3)(OH)4Mon. 2/m : P21/m
7.BC.70ChenitePb4Cu(SO4)2(OH)6Tric. 1 : P1
7.BC.75KrivovichevitePb3Al(OH)6(SO4)(OH)Trig. 3m : R3c
7.BC.80AnhydrokainiteKMg(SO4)Cl

Other InformationHide

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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 FranksousaiteHide

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mindat.org URL:
https://www.mindat.org/min-55765.html
Please feel free to link to this page.

References for FranksousaiteHide

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Localities for FranksousaiteHide

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Showing 1 localities.

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
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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.
Bolivia (TL)
  • Potosí
    • Antonio Quijarro Province
      • Porco Municipality
Miyawaki et al. (2022) +2 other references
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