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
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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.
Thailand | |
| Guo et al. (1994) +1 other reference |
