UM1998-10-CO:CoHNi
A synonym of Kaznakhtite
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Formula:
Ni6Co2(CO3)(OH)16 · 4H2O
Synonym:
A synonym of Kaznakhtite
The Co analogue of reevesite. Chemically similar to comblainite.
As fine-grained aggregates formed by weathering of pecoraite-magnetite-millerite-polydymite.
Electron microprobe data (wt.%, 2 most Co-rich analyses; O3(OH)16 empirical formula basis):
SiO2 4.87, 2.96
Fe2O3 0.47, 1.96
MgO 0.66, 0.55
NiO 48.18, 48.45
Co2O3 16.37, 14.83,
CO2 (calc.) 4.19, 4.24
SO3 0.52, 0.44
H2O (calc.) 15.41, 15.41
total 90.67, 88.84
This corresponds to (Ni6.03-6.07Mg0.15-0.13)Σ6.19(Co1.85-1.67Fe3+0.06-0.22)Σ1.90[(CO3)0.89-0.90(SO4)0.06-0.05]Σ0.95.
As fine-grained aggregates formed by weathering of pecoraite-magnetite-millerite-polydymite.
Electron microprobe data (wt.%, 2 most Co-rich analyses; O3(OH)16 empirical formula basis):
SiO2 4.87, 2.96
Fe2O3 0.47, 1.96
MgO 0.66, 0.55
NiO 48.18, 48.45
Co2O3 16.37, 14.83,
CO2 (calc.) 4.19, 4.24
SO3 0.52, 0.44
H2O (calc.) 15.41, 15.41
total 90.67, 88.84
This corresponds to (Ni6.03-6.07Mg0.15-0.13)Σ6.19(Co1.85-1.67Fe3+0.06-0.22)Σ1.90[(CO3)0.89-0.90(SO4)0.06-0.05]Σ0.95.
Unique Identifiers
Mindat ID:
7648 (as UM1998-10-CO:CoHNi)
55607 (as Kaznakhtite)
55607 (as Kaznakhtite)
Long-form identifier:
mindat:1:1:7648:3 (as UM1998-10-CO:CoHNi)
mindat:1:1:55607:3 (as Kaznakhtite)
mindat:1:1:55607:3 (as Kaznakhtite)
Internet Links for UM1998-10-CO:CoHNi
mindat.org URL:
https://www.mindat.org/min-7648.html
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References for UM1998-10-CO:CoHNi
Reference List:
Song, Y., Moon, H.-S. (1998) Additional data on reevesite and its Co-analogue, as a new member of the hydrotalcite group. Clay Minerals, 33 (2) 285-296 doi:10.1180/000985598545480
