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UM1994-06-O:AlCo

Valid as an unnamed mineral
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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 (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).


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Unique IdentifiersHide

Mindat ID:
53510
Long-form identifier:
mindat:1:1:53510:4

Similar NamesHide

UM1977-08-O:AlCaHCa2Al2O5 · nH2O
UM1977-09-O:AlCaHCa4Al2O7 · nH2O

IMA Classification of UM1994-06-O:AlCoHide

IMA status notes:
Unnamed (probably valid)

Chemistry of UM1994-06-O:AlCoHide

Mindat Formula:
CoAl2O4
Element Weights:
Element% weight
O36.179 %
Co33.316 %
Al30.506 %

Calculated from ideal end-member formula.
Elements listed:
Al, Co, O - search for minerals with similar chemistry

Relationship of UM1994-06-O:AlCo to other SpeciesHide

Member of:
Spinel Subgroup > Oxyspinel Group > Spinel Supergroup
Other Members of Spinel Subgroup:
ChihmingiteNiAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
ChromiteFe2+Cr3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
CochromiteCoCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
CoulsoniteFe2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
CuprospinelCu2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
DellagiustaiteV2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
Deltalumite(Al0.67◻0.33)Al2O4Tet. 4 2m : P4m2
FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
GahniteZnAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
GalaxiteMn2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
GuiteCo2+Co3+2O4Iso.
HausmanniteMn2+Mn3+2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
HercyniteFe2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
HetaeroliteZnMn2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
JacobsiteMn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
Jacobsite-QMn2+(Fe3+,Mn3+)2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
Maghemite(Fe3+0.67◻0.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
MagnesiochromiteMgCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
MagnesiocoulsoniteMgV2O4Iso. m3m (4/m 3 2/m)
MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
MagnetiteFe2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
ManganochromiteMn2+Cr2O4Iso. m3m (4/m 3 2/m) : Fd3m
Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
SpinelMgAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
ThermaerogeniteCuAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
Titanomaghemite(Ti4+0.5◻0.5)Fe3+2O4Iso. 4 3 2 : P43 3 2
TrevoriteNi2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
VuorelaineniteMn2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
ZincochromiteZnCr2O4Iso. m3m (4/m 3 2/m) : Fd3m

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.

Internet Links for UM1994-06-O:AlCoHide

References for UM1994-06-O:AlCoHide

Localities for UM1994-06-O:AlCoHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- 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.
Thailand
 
  • Kanchanaburi Province
    • Bo Phloi District
      • Bo Phloi
Guo et al. (1994) +1 other reference
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