Named in 1970 by A. T. Andersen, T. E. Bunch, Eugene N. Cameron, S. E. Haggery, F. R. Boyd, O. B. James, K. Keil, Marun Prinz, Paul Ramdohr, and A. El Goresy. This name is in honor of the first three astronauts who traveled to Earth's Moon. The name is an acronym derived from the last names of Neil Alden ARMstrong (1930-2012), Edwin Eugene ALdrin (1930-) and Michael COLlins (1930-2021), the Apollo 11 astronauts who collected the type samples.

Co-Type Localities:

ⓘ Disko Island, Qeqertalik, Greenland
ⓘ Tranquillity Base (Apollo 11 landing site), Mare Tranquillitatis (Sea of Tranquility), The Moon

Armalcolite-Pseudobrookite Series.

Compare also karrooite.

Unique IdentifiersHide

Mindat ID:

341

Long-form identifier:

mindat:1:1:341:0

IMA Classification of ArmalcoliteHide

IMA status:

Approved

IMA status notes:

Redefined by the IMA

IMA Formula:

(Mg,Fe²⁺)Ti₂O₅

First published:

1970

Approval history:

IMA 25-A –Ferropseudobrookite (approval), armalcolite (redefinition), pseudobrookite group (establishment)

Type description reference:

Anderson, A.T., Bunch, T.E, Cameron, E.N, Haggerty, S.E., Boyd, F.R., Finger, L.W., James, O.B., Keil, K., Prinz, M., Ramdohr, P., El Goresy, A. (1970) Armalcolite, a new mineral from the Apollo 11 samples. Geochimica et Cosmochimica Acta: 34: Supplement 1: 55-63.

Classification of ArmalcoliteHide

Strunz-mindat (2026):

4.CB.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations

Dana 8th ed.:

7.7.1.2

7 : MULTIPLE OXIDES
7 : AB₂X₅

Hey's CIM Ref.:

7.9.21

7 : Oxides and Hydroxides
9 : Oxides of Ti

Mineral SymbolsHide

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.

Symbol	Source	Reference for Standard
Arm	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Arm	Whitney & Evans (2010)	Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371

Physical Properties of ArmalcoliteHide

Lustre:

Metallic

Transparency:

Opaque

Colour:

Grey

Hardness:

5 on Mohs scale

Density:

4.94 g/cm³ (Measured) 4.64 g/cm³ (Calculated)

Optical Data of ArmalcoliteHide

Type:

Biaxial

Anisotropism:

Strong, pale grey to dark bluish gray

Reflectivity:

Wavelength	R₁ (%)	R₂ (%)
450nm	14.1%	15.2%
470nm	14.0%	15.0%
500nm	13.8%	14.7%
520nm	13.7%	14.5%
546nm	13.4%	14.4%
586nm	13.3%	14.3%
620nm	13.2%	14.2%
640nm	13.0%	14.1%

Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 15.2%.
R₁ shown in black, R₂ shown in

Colour in reflected light:

Grey to tan

Pleochroism:

Visible

Chemistry of ArmalcoliteHide

Mindat Formula:

MgTi⁴⁺₂O₅

Element Weights:

Element	% weight
Ti	47.858 %
O	39.991 %
Mg	12.150 %

Calculated from ideal end-member formula.

Elements listed:

Mg, O, Ti - search for minerals with similar chemistry

Crystallography of ArmalcoliteHide

Crystal System:

Orthorhombic

Class (H-M):

mmm(2/m2/m2/m) - Dipyramidal

Cell Parameters:

a = 9.743 Å, b = 10.023 Å, c = 3.738 Å

Ratio:

a:b:c = 0.972 : 1 : 0.373

Unit Cell V:

365.03 Å³ (Calculated from Unit Cell)

Comment:

Space Group: Bbmm

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

View
CIF File Best | x | y | z | a | b | c

Rotation
Stop | Start

Labels
Console Off | On | Grey | Yellow

Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0009836	Armalcolite	Wechsler B A, Von Dreele R B (1989) Structure refinements of Mg2TiO4, MgTiO3 and MgTi2O5 by time-of-flight neutron powder diffraction Acta Crystallographica B45 542-549	👁 Image	1989	synthetic	0	293
0009835	Armalcolite	Wechsler B A, Von Dreele R B (1989) Structure refinements of Mg2TiO4, MgTiO3 and MgTi2O5 by time-of-flight neutron powder diffraction Acta Crystallographica B45 542-549	👁 Image	1989	synthetic	0	293
0000593	Armalcolite	Wechsler B A (1977) Cation distribution and high-temperature crystal chemistry of armalcolite American Mineralogist 62 913-920	👁 Image	1977	0	297
0000591	Armalcolite	Wechsler B A (1977) Cation distribution and high-temperature crystal chemistry of armalcolite American Mineralogist 62 913-920	👁 Image	1977	0	297
0000590	Armalcolite	Wechsler B A (1977) Cation distribution and high-temperature crystal chemistry of armalcolite American Mineralogist 62 913-920	👁 Image	1977	0	297
0000594	Armalcolite	Wechsler B A (1977) Cation distribution and high-temperature crystal chemistry of armalcolite American Mineralogist 62 913-920	👁 Image	1977	0	673
0000592	Armalcolite	Wechsler B A (1977) Cation distribution and high-temperature crystal chemistry of armalcolite American Mineralogist 62 913-920	👁 Image	1977	0	1373

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.468 Å	(100)
1.958 Å	(80)
2.763 Å	(25)
2.454 Å	(25)
2.235 Å	(15)
2.199 Å	(15)
2.414 Å	(10)

Locality:

Tranquillity Base (Apollo 11 landing site), Mare Tranquillitatis (Sea of Tranquility), The Moon

Reference:

Comments:

Recorded on type material

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 1: Primary nebular phases	4.567-4.561
4 : Primary chondrule phases	4.566–4.561
Stage 3a: Earth’s earliest Hadean crust	>4.50
7 : Ultramafic igneous rocks
Near-surface Processes
30 : Terrestrial impact minerals
High-? alteration and/or metamorphism
31 : Thermally altered carbonate, phosphate, and iron formations
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks
Stage 5: Initiation of plate tectonics	<3.5-2.5
41 : Mantle metasomatism

Geological Setting:

in salic volcanics; in ultramafic rocks, lamproites and kimberlites; in terrestrial impact craters; in inclusions in carbonaceous chondrites; rarely in granite pegmatites

Type Occurrence of ArmalcoliteHide

Co-Type Localities:

ⓘ Disko Island, Qeqertalik, Greenland
ⓘ Tranquillity Base (Apollo 11 landing site), Mare Tranquillitatis (Sea of Tranquility), The Moon

General Appearance of Type Material:

subhedral to anhedral grains to 300 µm across

Place of Conservation of Type Material:

Lunar Science Institute, Houston, Texas, USA

neotype from Disko Island, Greenland, sample 176411, Natural History Museum of Denmark

Geological Setting of Type Material:

in Ti-rich basalt and microbreccias of lunar samples, formed at low pressures and high temperatures

Reference:

Other Language Names for ArmalcoliteHide

Dutch:Armalcoliet

French:Armalcolite

German:Armalcolit

Norwegian:Armalcolitt

Russian:Армолколит

Simplified Chinese:低铁假板钛矿
镁铁钛矿
阿尔马科月球石

Spanish:Armalcolita

Relationship of Armalcolite to other SpeciesHide

Member of:

Pseudobrookite Group

Other Members of Pseudobrookite Group:

Ferropseudobrookite	Fe²⁺Ti⁴⁺₂O₅	Orth. mmm(2/m2/m2/m) : Cmcm
Griffinite	Al₂TiO₅	Orth. mmm(2/m2/m2/m) : Cmcm
Pseudobrookite	Fe₂TiO₅	Orth. mmm(2/m2/m2/m)
Sassite	Ti³⁺₂Ti⁴⁺O₅	Orth. mmm(2/m2/m2/m) : Cmcm

Forms a series with:

Pseudobrookite

Armalcolite-Pseudobrookite Series

Common AssociatesHide

Associations Based on Photo Data:

2 photos of Armalcolite associated with Tetraferriphlogopite	KMg₃(Fe³⁺Si₃O₁₀)(OH,F)₂
2 photos of Armalcolite associated with Sanidine	K(AlSi₃O₈)
1 photo of Armalcolite associated with Pseudobrookite	Fe₂TiO₅

Related Minerals - Strunz-mindat Grouping Hide

4.CB.	Magnesiohögbomite-6N12S	Mg₅Al₁₁TiO₂₃(OH)	Trig. 3m(32/m) : R3m
4.CB.	Kidodite	BaMg₂Fe₁₆O₂₇	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CB.	Ferrohögbomite-2N2S	[(Fe²⁺,Mg,Zn,Al)₃(Al,Ti,Fe³⁺)₈O₁₅(OH)]₂	Hex. 6mm : P6₃mc
4.CB.	Zhenruite	(MoO₃)₂ · H₂O	Mon. 2/m : P2₁/m
4.CB.	Fuyuanite	Mg₇Nb₆O₁₈(OH)₈	Trig. 3 : P3
4.CB.	Virgilluethite	MoO₃ · H₂O	Mon. 2/m : P2₁/b
4.CB.	Pengite	(Pb₈Sb³⁺₃)_Σ11Sb⁵⁺₉O₃₅	Trig. 3m(32/m) : R3m
4.CB.05	Brizziite	NaSb⁵⁺O₃	Trig. 3 : R3
4.CB.05	Tistarite	Ti³⁺₂O₃	Trig. 3m(32/m) : R3c
4.CB.05	Hematite	Fe₂O₃	Trig. 3m(32/m) : R3c
4.CB.05	Ecandrewsite	ZnTiO₃	Trig. 3 : R3
4.CB.05	Melanostibite	Mn²⁺₂Fe³⁺Sb⁵⁺O₆	Trig. 3 : R3
4.CB.05	'UM1998-11-O-AuHSb'	Au⁺₂Sb³⁺O₂(OH)
4.CB.05	Karelianite	V³⁺₂O₃	Trig. 3m(32/m) : R3c
4.CB.05	Corundum	Al₂O₃	Trig. 3m(32/m) : R3c
4.CB.05	Eskolaite	Cr₂O₃	Trig. 3m(32/m) : R3c
4.CB.05	Geikielite	MgTiO₃	Trig. 3 : R3
4.CB.05	Akimotoite	MgSiO₃	Trig. 3 : R3
4.CB.05	'Unnamed (Fe-Cr Oxide)'	FeCrO₃	Trig. 3 : R3
4.CB.05	'Auroantimonate'	AuSbO₃
4.CB.05	Hemleyite	Fe²⁺SiO₃	Trig. 3 : R3
4.CB.05	Ilmenite	Fe²⁺TiO₃	Trig. 3 : R3
4.CB.05	Pyrophanite	Mn²⁺TiO₃	Trig. 3 : R3
4.CB.10	Bixbyite-(Fe)	(Fe,Mn)₂O₃	Iso.
4.CB.10	Bixbyite-(Mn)	Mn³⁺₂O₃	Iso. m3(2/m3) : Ia3
4.CB.10	Avicennite	Tl₂O₃	Iso. m3(2/m3) : Ia3
4.CB.15	Ferropseudobrookite	Fe²⁺Ti⁴⁺₂O₅	Orth. mmm(2/m2/m2/m) : Cmcm
4.CB.15	Griffinite	Al₂TiO₅	Orth. mmm(2/m2/m2/m) : Cmcm
4.CB.15	Pseudobrookite Group
4.CB.15	Sassite	Ti³⁺₂Ti⁴⁺O₅	Orth. mmm(2/m2/m2/m) : Cmcm
4.CB.15	Pseudobrookite	Fe₂TiO₅	Orth. mmm(2/m2/m2/m)
4.CB.20	Zincovelesite-6N6S	Zn₃(Fe³⁺,Mn³⁺,Al,Ti)₈O₁₅(OH)	Trig. 3m(32/m) : P3m1
4.CB.20	Magnesiohögbomite-2N4S	(Mg_8.43Fe²⁺_1.57)_Σ=10Al₂₂Ti⁴⁺₂O₄₆(OH)₂	Hex. 6mm : P6₃mc
4.CB.20	Magnesiobeltrandoite-2N3S	(Mg₆Al₂)(Al₁₈Fe³⁺₂)O₃₈(OH)₂	Trig. 3m : P3m1
4.CB.20	Zincohögbomite-2N6S	[(Zn,Mg)₇(Al,Fe³⁺,Ti)₁₆O₃₁(OH)]₂	Hex. 6mm : P6₃mc
4.CB.20	Magnesiohögbomite-6N6S	[(Mg,Fe²⁺)₃(Al,Ti,Fe³⁺)₈O₁₅(OH)]₆	Trig. 3m(32/m) : R3m
4.CB.20	Magnesiohögbomite-2N3S	[(Mg,Fe²⁺,Zn)₄(Al,Ti,Fe³⁺)₁₀O₁₉(OH)]₂	Trig. 3m(32/m) : P31m
4.CB.20	Magnesiohögbomite-2N2S	[(Mg,Fe²⁺)₃[Al₇(Ti,Fe³⁺)]O₁₅(OH)]₂	Hex. 6mm : P6₃mc
4.CB.20	'Ferrohögbomite-6N12S'	[(Fe²⁺,Mg,Zn)₅(Al,Ti,Fe³⁺)₁₂O₂₃(OH)]₆	Trig. 3m(32/m) : R3m
4.CB.20	Zincohögbomite-2N2S	[(Zn,Al,Fe²⁺)₃(Al,Fe³⁺,Ti)₈O₁₅(OH)]₂	Hex. 6mm : P6₃mc
4.CB.25	Kleberite	FeTi₆O₁₁(OH)₅	Mon. 2/m : P2₁/b
4.CB.25	Pseudorutile	Fe³⁺₂Ti⁴⁺₃O₉	Hex. 622 : P6₃22
4.CB.30	Oxyvanite	V³⁺₂V⁴⁺O₅	Mon. 2/m : B2/b
4.CB.30	Berdesinskiite	V³⁺₂TiO₅	Mon.
4.CB.30	Kaitianite	Ti³⁺₂Ti⁴⁺O₅	Mon. 2/m : B2/b
4.CB.35	Machiite	Al₂Ti₃O₉	Mon. 2/m : B2/b
4.CB.35	Vestaite	(Ti⁴⁺Fe²⁺)Ti⁴⁺₃O₉	Mon. 2/m : B2/b
4.CB.35	Olkhonskite	(Cr,V)₂Ti₃O₉	Mon.
4.CB.35	Schreyerite	V³⁺₂Ti⁴⁺₃O₉	Mon. 2/m : B2/b
4.CB.40	Zincorinmanite-(Zn)	Zn₂Sb₂(Fe³⁺₄Zn₂)O₁₄(OH)₂	Hex. 6mm : P6₃mc
4.CB.40	Majindeite	Mg₂Mo₃O₈	Hex. 6mm : P6₃mc
4.CB.40	Almagreraite	CuZnMn⁴⁺₃O₈	Orth. mm2 : Pmn2₁
4.CB.40	Kamiokite	Fe₂Mo₃O₈	Hex. 6mm : P6₃mc
4.CB.40	Nolanite	V³⁺₈Fe³⁺₂O₁₄(OH)₂	Hex. 6mm : P6₃mc
4.CB.40	Iseite	Mn₂Mo₃O₈	Hex. 6mm : P6₃mc
4.CB.40	Rinmanite	Zn₂Sb₂Mg₂Fe₄O₁₄(OH)₂	Hex. 6 : P6₃
4.CB.45	Stibioclaudetite	AsSbO₃	Mon. 2/m : P2₁/m
4.CB.45	Claudetite	As₂O₃	Mon. 2/m
4.CB.50	Senarmontite	Sb₂O₃	Iso. m3m(4/m32/m) : Fd3m
4.CB.50	Arsenolite	As₂O₃	Iso. m3m(4/m32/m) : Fd3m
4.CB.55	Valentinite	Sb₂O₃	Orth. mmm(2/m2/m2/m) : Pccn
4.CB.60	Bismite	Bi₂O₃	Mon. 2/m : P2₁/b
4.CB.65	Sphaerobismoite	Bi₂O₃	Tet.
4.CB.70	Sillénite	Bi₁₂SiO₂₀	Iso. 23 : I23
4.CB.75	Kyzylkumite	V³⁺Ti₂O₅(OH)	Mon. 2/m : P2₁/b
4.CB.80	'Tietaiyangite'	Fe³⁺₄Fe²⁺TiO₉	Hex.
4.CB.85	Liuite	FeTiO₃	Orth. mmm(2/m2/m2/m) : Pnma
4.CB.90	Luogufengite	Fe₂O₃	Orth. mm2 : Pna2₁
4.CB.95	Wangdaodeite	FeTiO₃	Trig. 3m : R3c

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Armalcolite in petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

Igneous rock
- Normal crystalline igneous rock
  - Fine-grained ("volcanic") normal crystalline igneous rock
    - Basic volcanic rock
      - Basaltoid
        Basalt
        High-Ti basalt

Internet Links for ArmalcoliteHide

mindat.org URL:

https://www.mindat.org/min-341.html
Please feel free to link to this page.

Search Engines:

Look for Armalcolite on Google

Look for Armalcolite images on Google

Look for Armalcolite on Bing

Look for Armalcolite images on Bing

Look for Armalcolite on DuckDuckGo

Look for Armalcolite images on DuckDuckGo

Look for Armalcolite in the Rock H. Currier Digital Library

External Links:

Look for Armalcolite on Webmineral

Look for Armalcolite on Wikipedia

Look for Armalcolite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Buy from McDougall Minerals

The Arkenstone - Fine Minerals

Buy from D. Joyce minerals

References for ArmalcoliteHide

Reference List:

Fleischer, Michael (1970) New Mineral Names. American Mineralogist, 55 (11-12) 2135-2139

Lind, M. D., Housley, R. M. (1972) Crystallization Studies of Lunar Igneous Rocks: Crystal Structure of Synthetic Armalcolite. Science, 175 (4021). 521-523 doi:10.1126/science.175.4021.521

HAGGERTY, S. E. (1973) Ortho and Para-Armalcolite Samples in Apollo 17. Nature Physical Science, 242. 123-125 doi:10.1038/physci242123a0

Lindsley, D.H., Kesson, S.E., Hartzman, M.J., and Cushman, M.K. (1974) The stability of armalcolite: Experimental studies in the system MgO-Fe-Ti-O. Proceedings of the 5th. Lunar Science Conference, Geochimica et Cosmochimica Acta 61, Supplement 1, 521-534.

Smyth, Joseph R. (1974) The crystal chemistry of armalcolites from Apollo 17. Earth and Planetary Science Letters, 24 (2). 262-270 doi:10.1016/0012-821x(74)90104-6

Wechsler, Barry A. (1977) Cation distribution and high-temperature crystal chemistry of armalcolite. American Mineralogist, 62 (9-10) 913-920

Hauck, J. (1981) Crystallography and phase relations of MeO-M2O3-TiO2 systems (Me = Fe, Mg, Ni; M = Al, Cr, Fe). Journal of Solid State Chemistry, 36. 52-65 doi:10.1016/0022-4596(81)90191-2

Pedersen, A. K. (1981) Armalcolite-bearing Fe-Ti oxide assemblages in graphite-equilibrated salic volcanic rocks with native iron from Disko, central West Greenland. Contributions to Mineralogy and Petrology, 77 (4) 307-324 doi:10.1007/bf00371560

Bowles, John F. W. (1988) Definition and range of composition of naturally occurring minerals with the pseudobrookite structure. American Mineralogist, 73 (11-12) 1377-1383

EDGAR, A. D., CHARBONNEAU, H. E., MITCHELL, R. H. (1992) Phase Relations of an Armalcolite-Phlogopite Lamproite from Smoky Butte, Montana: Applications to Lamproite Genesis. Journal of Petrology, 33 (3) 505-520 doi:10.1093/petrology/33.3.505

Grey, I.E., Li, C., Madsen, I.C. (1994) Phase equilibria and structural studies on the solid solution MgTi2O5-Ti3O5. Journal of Solid State Chemistry: 113: 62-73.

Hayob, Jodie L., Essene, Eric J. (1995) Armalcolite in crustal paragneiss xenoliths, central Mexico. American Mineralogist, 80 (7) 810-822 doi:10.2138/am-1995-7-817

Anthony, J.W. et al. (1997) Handbook of Mineralogy, Vol. 3, 22.

Yang, H., Hazen, R.M. (1998) Crystal chemistry of cation order-disorder in pseudobrookite-type MgTi2O5. Journal of Solid State Chemistry: 138: 238-244.

(2005) Armalcolite. Handbook of Mineralogy. Mineralogical Society of America

Zhang, Ai-Cheng, Pang, Run-Lian, Sakamoto, Naoya, Yurimoto, Hisayoshi (2020) The Cr-Zr-Ca armalcolite in lunar rocks is loveringite: Constraints from electron backscatter diffraction measurements. American Mineralogist, 105 (7). 1021-1029 doi:10.2138/am-2020-7260

Bosi, Ferdinando; Hatert, Frédéric; Pasero, Marco; Mills, Stuart J. (2026) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 89. Mineralogical Magazine, 1-5 doi:10.1180/mgm.2026.10199

Localities for ArmalcoliteHide

Showing 51 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
symbol next to localities in the list can be used to jump to that position on the map.

Hide all sections | Show all sections

Locality ListHide

👁 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.

Antarctica
East Antarctica Victoria Land Allan Hills ⓘ Allan Hills 85085 meteorite	Makoto Kimura & Ahmed El Goresy (1989)
Argentina
Santa Cruz Province Río Chico Department ⓘ Cerro Redondo cinder cone	Tassara et al. (2017)
Australia
Queensland Western Downs Region Moonie ⓘ Miles meteorite	Ikeda et al. (1996) +1 other reference
Austria
Styria Südoststeiermark District Klöch ⓘ Basalt quarry	Taucher et al. (1998)
Brazil
Pernambuco Fernando de Noronha archipelago ⓘ Chapéu do Nordeste islet	Kogarko et al. (2001)
Canada
Nunavut Coppermine River area ⓘ Muskox Intrusion	Roach et al. (1998)
China
Shaanxi Hanzhong Ningqiang County ⓘ Ningqiang meteorite (Ningqiang carbonaceous chondrite)	Lin et al. (1996)
Czech Republic
Liberec Region ⓘ North Bohemian Uranium District	Kühn +5 other references
France
French Southern and Antarctic Lands ⓘ Kerguelen Islands	Contrib. Mineral. Petrol. et al. (1995) +1 other reference
Germany
Bavaria Upper Bavaria Traunstein District ⓘ Chiemsee pseudocrater	Neumair et al. (2016)
ⓘ Nördlinger Ries Crater	J. W. Anthony et al.: Handbook of Mineralogy (1997)
Rhineland-Palatinate Mayen-Koblenz Pellenz Nickenich ⓘ Nickenicher Weinberg	Schäfer (2021)
Greenland (TL)
Qeqertalik ⓘ Disko Island (TL)	J. W. Anthony et al.: Handbook of Mineralogy (1997) +1 other reference
ⓘ Asuk	Pedersen (1979)
Mexico
Chihuahua Pueblito de Allende ⓘ Allende meteorite	Brearley et al. (1998)
San Luis Potosí ⓘ El Toro cinder cone	J. W. Anthony et al.: Handbook of Mineralogy (1997)
Mongolia
Khovd Province Myangad District ⓘ Khaldzan Buragtag massif	Pavel.M. Kartashov (n.d.)
Northwest Africa Meteorites
ⓘ	Zhang et al. (2020)
Oman
Dhofar Governorate ⓘ Dhofar 301 Lunar meteorite (Dho 301)	Meteoritical Bulletin No. 86
ⓘ Dhofar 733 Lunar meteorite (Dho 733)	Russell et al. (2003)
ⓘ Dhofar 925 Lunar meteorite (Dho 925)	- (2004, July)
Romania
Timiș Gătaia ⓘ Sumiga Hill	Seghedi I. (2006)
Russia
Chelyabinsk Oblast ⓘ Kopeysk	Cesnokov et al. (1998)
Korkinsky District ⓘ Korkino	Sharygin et al. (2010)
Krasnoyarsk Krai Taymyrskiy Autonomous Okrug Taimyr Peninsula ⓘ Khungtukun Massif	Pavel.M. Kartashov (n.d.)
Taymyrsky Dolgano-Nenetsky District Kureika river ⓘ Dzheltul'skii massif (Dzhaltul)	Vereshchagin et al. (2025)
ⓘ Sakha	[World of Stones 12:49]
Oymyakonsky District ⓘ Elga meteorite	Litasov et al. (2017) +1 other reference
ⓘ Sikhote-Alin Mountains	6th orogenic lherzolite conference 2014 ...
Serbia
Central Serbia Pčinja District Preševo ⓘ Cer occurrence	Kostić +3 other references
Slovakia
Banská Bystrica Region Banská Bystrica District Brusno ⓘ Sopotnická Valley	Uher
South Africa
Free State Xhariep District Municipality Kopanong Local Municipality Jagersfontein ⓘ Jagersfontein Mine	Cairncross et al. (1995)
Limpopo Waterberg District Municipality Mogalakwena Local Municipality Mokopane Mogalakwena Mine ⓘ Sandsloot Mine	MCDONALD I. (2005)
Northern Cape Frances Baard District Municipality Sol Plaatje Local Municipality Kimberley KEM JV Mine (Kimberley Ekapa Mining Joint Venture mine; Kimberley Underground mine) ⓘ Bultfontein Mine	J. W. Anthony et al.: Handbook of Mineralogy (1997)
ⓘ Dutoitspan Mine	J. W. Anthony et al.: Handbook of Mineralogy (1997)
Spain
Andalusia Granada Colomera ⓘ Colomera meteorite	Prinz et al. (1983, March)
Castile-La Mancha Albacete Hellín ⓘ Cancarix lamproite intrusion	Venturelli et al. (1984) +2 other references
ⓘ Sierra de las Cabras	Salvioli-Mariani et al. (1996)
Catalonia Lleida Pallars Jussà Tremp Casterner de les Olles ⓘ Les Collades ravine (Escales reservoir)	Joan Rosell
ⓘ Ophite outcrop	Joan Rosell SEM-EDS analysis
Murcia ⓘ Jumilla	J. W. Anthony et al.: Handbook of Mineralogy (1997)
Ukraine
Crimea Alushta ⓘ Ayu-Dag Mountain	Spiridonov et al. (2019)
USA
Montana Garfield County ⓘ Smoky Butte (Smoky Butte Lamproite)	Velde (1975) +1 other reference
Texas Uvalde County Knippa ⓘ Knippa Quarry (Whites mines; Texas Traprock quarries; Traprock Hill) ?	Smith (1991)
Utah Piute County ⓘ Pine Canyon	Mineralogical Magazine 1998 62 : 265-269
Washington Skamania County ⓘ Washougal Basalt Rock Quarry ?	Zach Capel
Wyoming Sweetwater County ⓘ Leucite Hills Mining District	gsa.confex.com (n.d.)
Zimbabwe
Masvingo ⓘ Mwenezi District	J. W. Anthony et al.: Handbook of Mineralogy (1997)
The Moon
Descartes Highlands ⓘ Apollo 16 landing site	Dowty et al. (1974) +1 other reference
Mare Tranquillitatis (Sea of Tranquility) ⓘ Tranquillity Base (Apollo 11 landing site) (TL)	Anderson et al. (1970)
Taurus-Littrow Valley ⓘ Apollo 17 landing site	... +2 other references

Quick NavTop About Armalcolite Unique Identifiers IMA Classification Classification Mineral Symbols Physical Properties Optical Data Chemistry Crystallography Crystal Structure X-Ray Powder Diffraction Geological Environment Type Occurrence Other Languages Relationships Common Associates Strunz-Mindat Other Information Armalcolite in petrology Internet Links References Localities Locality List

Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 4, 2026 11:40:31 Page updated: March 22, 2026 08:39:06

Go to top of page

URL: https://www.mindat.org/min-341.html

⇱ Armalcolite: Mineral information, data and localities.

Armalcolite

About ArmalcoliteHide