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Stolperite
A valid IMA mineral species
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About Stolperite
Edward M. Stolper
Formula:
AlCu
Specific Gravity:
5.76 (Calculated)
Crystal System:
Isometric
Name:
Named after Edward M. Stolper, the William E. Leonhard Professor of Geology and provost of Caltech. Specialist in the origin and evolution of igneous rocks on the earth and other planets.
Type Locality:
Dimorph of:
Found as inclusions in khatyrkite, or accompanying icosahedrite and/or hollisterite (Al3Fe) and khatyrkite; it is being surrounded by forsterite, spinel, and glass. Forms crystals, from 0.5 to 3 μm in size.
Chemically similar to khatyrkite. Compare also 'Unnamed (Al-Cu-Fe Alloy)' and 'Unnamed (Al-Cu-Fe Alloy II)'.
Chemically similar to khatyrkite. Compare also 'Unnamed (Al-Cu-Fe Alloy)' and 'Unnamed (Al-Cu-Fe Alloy II)'.
Unique Identifiers
Mindat ID:
47864
Long-form identifier:
mindat:1:1:47864:1
Similar Names
| Stolpenite | A synonym of Montmorillonite |
IMA Classification of Stolperite
Classification of Stolperite
1.AA.30
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
A : Copper-cupalite family
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
A : Copper-cupalite family
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Slp | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Stolperite
Transparency:
Opaque
Comment:
The color, luster, streak, hardness, tenacity, cleavage, fracture, density, and optical properties could not be determined because of the small grain size.
Density:
5.76 g/cm3 (Calculated)
Chemistry of Stolperite
Mindat Formula:
AlCu
Elements listed:
Crystallography of Stolperite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Pm3m
Setting:
Pm3m
Cell Parameters:
a = 2.9 Å
Unit Cell V:
24.4 ų
Z:
1
Comment:
CsCl structure type
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.900 Å | (20) |
| 2.051 Å | (100) |
| 1.450 Å | (17) |
| 1.297 Å | (7) |
| 1.184 Å | (34) |
| 1.025 Å | (10) |
| 0.917 Å | (12) |
| 0.775 Å | (12) |
Comments:
Calculated.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
| 6 : Secondary asteroid phases | 4.566-4.560 |
Type Occurrence of Stolperite
General Appearance of Type Material:
Irregular grains, 0.5 to 3 µm in size.
Place of Conservation of Type Material:
Mineralogical collections of the Smithsonian Institution’s National Museum of Natural History, Washington, D.C., USA, registration number USNM 7908.
Geological Setting of Type Material:
Carbonaceous chondrite (CV3) meteorite rich in aluminum.
Associated Minerals at Type Locality:
Synonyms of Stolperite
Other Language Names for Stolperite
Dutch:Stolperiet
German:Stolperit
Common Associates
Associations Based on Photo Data:
| 5 photos of Stolperite associated with Khatyrkite | (Cu,Zn)Al2 |
| 2 photos of Stolperite associated with Native Iron | Fe |
| 1 photo of Stolperite associated with Kryachkoite | (Al,Cu)6(Fe,Cu) |
| 1 photo of Stolperite associated with Hollisterite | Al3Fe |
| 1 photo of Stolperite associated with Icosahedrite | Al63Cu24Fe13 |
| 1 photo of Stolperite associated with Forsterite | Mg2(SiO4) |
| 1 photo of Stolperite associated with 'Unnamed (Al-Cu Alloy)' | Cu3Al2 (?) |
Related Minerals - Strunz-mindat Grouping
| 1.AA. | Jonlarsenite | Al4Cu9 |
| 1.AA. | Pratesiite | AgCuTe2 |
| 1.AA.05 | Native Lead | Pb |
| 1.AA.05a | Auricupride Subgroup | |
| 1.AA.05 | Native Nickel | Ni |
| 1.AA.05 | Native Silver | Ag |
| 1.AA.05 | 'UM2004-08-E:AuCuPd' | Cu2PdAu |
| 1.AA.05 | 'UM1991-06-E:AuCu' | Au3Cu |
| 1.AA.05 | Native Aluminium | Al |
| 1.AA.05 | Steinhardtite | Al0.38Ni0.32Fe0.30 |
| 1.AA.05 | Native Gold | Au |
| 1.AA.05 | Native Copper | Cu |
| 1.AA.05 | Copper Group | |
| 1.AA.10a | Cuproauride | Cu3Au |
| 1.AA.10b | Tetra-auricupride | AuCu |
| 1.AA.10a | Auricupride | Cu3Au |
| 1.AA.10 | Nickel Group | |
| 1.AA.15 | Anyuiite | AuPb2 |
| 1.AA.15 | Novodneprite | AuPb3 |
| 1.AA.15 | 'UM1985-02-E:AlZn' | (Zn,Cu)Al2 |
| 1.AA.15 | Khatyrkite | (Cu,Zn)Al2 |
| 1.AA.20 | Cupalite | (Cu,Zn)Al |
| 1.AA.25 | Hunchunite | Au2Pb |
| 1.AA.35 | Hollisterite | Al3Fe |
| 1.AA.40 | Icosahedrite | Al63Cu24Fe13 |
| 1.AA.45 | Kryachkoite | (Al,Cu)6(Fe,Cu) |
| 1.AA.50 | Proxidecagonite | Al34Ni9Fe2 |
Other Information
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 Stolperite
mindat.org URL:
https://www.mindat.org/min-47864.html
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External Links:
Mineral Dealers:
References for Stolperite
Reference List:
https://www.doitpoms.ac.uk/miclib/phase_diagrams.php?id=2(interactive phase diagram)
Ma, C., Lin, C., Bindi, L., Steinhardt, P.J. (2016) Discovery of new Al-Cu-Fe minerals in the Khatyrka CV3 meteorite. 79th Annual Meeting of the Meteoritical Society.
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter 32. Mineralogical Magazine, 80 (5) 915-922 doi:10.1180/minmag.2016.080.084
Ma, Chi, Lin, Chaney, Bindi, Luca, Steinhardt, Paul J. (2017) Hollisterite (Al3Fe), kryachkoite (Al,Cu)6(Fe,Cu), and stolperite (AlCu): Three new minerals from the Khatyrka CV3 carbonaceous chondrite. American Mineralogist, 102 (3) 690-693 doi:10.2138/am-2017-5991
Localities for Stolperite
Showing 3 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Italy | |
| Agrosı̀ et al. (2025) +1 other reference |
Russia (TL) | |
| Ma et al. (2017) |
Sudan | |
| Suttle et al. (2019) +1 other reference |
Quick NavTopAbout StolperiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Khatyrka meteorite, Iomrautvaam massif, Anadyrsky District, Chukotka Autonomous Okrug, Russia