UM1994-06-O:AlCo
Valid as an unnamed mineral
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Formula:
CoAl2O4
Member of:
Second natural Co-Al phase after wupatkiite.
Al analogue of cochromite; also Co analogue of spinel, hercynite, galaxite.
As a composite inclusion in a greenish-blue sapphire (Guo et al., 1994). The largest individual is 150 x 250 microns in diameter. Also as small euhedral crystals. Associated with a glass phase.
Electron microprobe data in wt.% (one of 16 analyses): TiO2 0.67, Al2O3 49.61, Cr2O3 11.57, FeO 9.55, MgO 6.04, CoO 22.38, total 99.82 wt%, corresponding to (Co0.523Mg0.262Fe0.233)Σ1.018(Al1.703Cr0.266Ti0.015)Σ1.984O4 (Guo et al., 1994).
Al analogue of cochromite; also Co analogue of spinel, hercynite, galaxite.
As a composite inclusion in a greenish-blue sapphire (Guo et al., 1994). The largest individual is 150 x 250 microns in diameter. Also as small euhedral crystals. Associated with a glass phase.
Electron microprobe data in wt.% (one of 16 analyses): TiO2 0.67, Al2O3 49.61, Cr2O3 11.57, FeO 9.55, MgO 6.04, CoO 22.38, total 99.82 wt%, corresponding to (Co0.523Mg0.262Fe0.233)Σ1.018(Al1.703Cr0.266Ti0.015)Σ1.984O4 (Guo et al., 1994).
Unique Identifiers
Mindat ID:
53510
Long-form identifier:
mindat:1:1:53510:4
GUID
(UUID V4):
(UUID V4):
eeec8721-4553-4cdb-9bc5-a667d4f60488
IMA Classification of UM1994-06-O:AlCo
IMA status notes:
Unnamed (probably valid)
Chemistry of UM1994-06-O:AlCo
Mindat Formula:
CoAl2O4
Elements listed:
Relationship of UM1994-06-O:AlCo to other Species
Member of:
Other Members of this group:
Chromite | Fe2+Cr3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Cochromite | CoCr2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Coulsonite | Fe2+V3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Cuprospinel | Cu2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) |
Dellagiustaite | V2+Al2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Deltalumite | (Al0.67◻0.33)Al2O4 | Tet. 4 2m : P4m2 |
Franklinite | Zn2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Gahnite | ZnAl2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Galaxite | Mn2+Al2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Guite | Co2+Co3+2O4 | Iso. |
Hausmannite | Mn2+Mn3+2O4 | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
Hercynite | Fe2+Al2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Hetaerolite | ZnMn2O4 | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
Jacobsite | Mn2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Jacobsite-Q | Mn2+(Fe3+,Mn3+)2O4 | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
Maghemite | (Fe3+0.67◻0.33)Fe3+2O4 | Iso. 4 3 2 : P41 3 2 |
Magnesiochromite | MgCr2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Magnesiocoulsonite | MgV2O4 | Iso. m3m (4/m 3 2/m) |
Magnesioferrite | MgFe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Magnetite | Fe2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Manganochromite | Mn2+Cr2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Nichromite | (Ni,Co,Fe)(Cr,Fe,Al)2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Spinel | MgAl2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Thermaerogenite | CuAl2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Titanomaghemite | (Ti4+0.5◻0.5)Fe3+2O4 | Iso. 4 3 2 : P43 3 2 |
Trevorite | Ni2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Vuorelainenite | Mn2+V3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Zincochromite | ZnCr2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
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 UM1994-06-O:AlCo
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https://www.mindat.org/min-53510.html
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References for UM1994-06-O:AlCo
Reference List:
Localities for UM1994-06-O:AlCo
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).
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.
All localities listed without proper references should be considered as questionable.
Thailand | |
| Guo et al. (1994) +1 other reference |