Kaznakhtite
A valid IMA mineral species
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About Kaznakhtite
Formula:
Ni6Co3+2(CO3)(OH)16 · 4H2O
Colour:
light green
Lustre:
Earthy
Specific Gravity:
2.864 (Calculated)
Crystal System:
Trigonal
Member of:
Name:
The mineral is named after its type locality.
Unique Identifiers
Mindat ID:
55607
Long-form identifier:
mindat:1:1:55607:3
IMA Classification of Kaznakhtite
Approved
IMA Formula:
Ni2+6Co3+2(OH)16(CO3)·4H2O
Approval year:
2021
First published:
2022
Approval history:
IMA No. 2021-056
Type description reference:
Kasatkin, Anatoly V., Britvin, Sergey N., Krzhizhanovskaya, Maria G., Chukanov, Nikita V., Škoda, Radek, Göttlicher, Jörg, Belakovskiy, Dmitry I., Pekov, Igor V., Levitskiy, Victor V. (2022) Kaznakhtite, Ni6Co3+2(CO3)(OH)16⋅4H2O, a new natural layered double hydroxide, the member of the hydrotalcite supergroup. Mineralogical Magazine, 86 (5) 841-848 doi:10.1180/mgm.2022.65
Classification of Kaznakhtite
5.DA.50
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
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 |
|---|---|---|
| Kzt | 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 Kaznakhtite
Earthy
Transparency:
Translucent
Colour:
Light green
Streak:
White
Cleavage:
Very Good
micaceous on {001}
micaceous on {001}
Density:
2.864 g/cm3 (Calculated)
Optical Data of Kaznakhtite
Type:
Uniaxial (-)
RI values:
nω = 1.676(3) nε = 1.657(3)
Max. Birefringence:
δ = 0.019
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Pleochroism:
Weak
Comments:
greenish hues
Chemistry of Kaznakhtite
Mindat Formula:
Ni6Co3+2(CO3)(OH)16 · 4H2O
Element Weights:
Crystallography of Kaznakhtite
Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 3.0514(3) Å, c = 23.179(2) Å
Ratio:
a:c = 1 : 7.596
Unit Cell V:
186.91 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.72 Å | (100) |
| 3.863 Å | (24) |
| 2.630 Å | (4) |
| 2.576 Å | (10) |
| 2.294 Å | (6) |
| 1.950 Å | (4) |
| 1.526 Å | (4) |
| 1.497 Å | (4) |
Reference:
Kasatkin, Anatoly V., Britvin, Sergey N., Krzhizhanovskaya, Maria G., Chukanov, Nikita V., Škoda, Radek, Göttlicher, Jörg, Belakovskiy, Dmitry I., Pekov, Igor V., Levitskiy, Victor V. (2022) Kaznakhtite, Ni6Co3+2(CO3)(OH)16⋅4H2O, a new natural layered double hydroxide, the member of the hydrotalcite supergroup. Mineralogical Magazine, 86 (5) 841-848 doi:10.1180/mgm.2022.65
Type Occurrence of Kaznakhtite
General Appearance of Type Material:
powdery aggregates forming flattened lenses up to 1.5 × 0.5 cm and veinlets up to 1 cm long and up to 1 mm thick
Place of Conservation of Type Material:
collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration no. 5727/1
Associated Minerals at Type Locality:
Reference:
Kasatkin, Anatoly V., Britvin, Sergey N., Krzhizhanovskaya, Maria G., Chukanov, Nikita V., Škoda, Radek, Göttlicher, Jörg, Belakovskiy, Dmitry I., Pekov, Igor V., Levitskiy, Victor V. (2022) Kaznakhtite, Ni6Co3+2(CO3)(OH)16⋅4H2O, a new natural layered double hydroxide, the member of the hydrotalcite supergroup. Mineralogical Magazine, 86 (5) 841-848 doi:10.1180/mgm.2022.65
Synonyms of Kaznakhtite
Other Language Names for Kaznakhtite
Dutch:Kaznakhtiet
German:Kaznakhtit
Relationship of Kaznakhtite to other Species
Member of:
Other Members of Hydrotalcite Group:
| Desautelsite | Mg6Mn3+2(OH)16[CO3] · 4H2O | Trig. 3m(32/m) |
| Droninoite | Ni6Fe3+2(OH)16Cl2 · 4H2O | Trig. 3m(32/m) : R3m |
| Hydrotalcite | Mg6Al2(CO3)(OH)16 · 4H2O | Trig. 3m(32/m) : R3m |
| Iowaite | Mg6Fe3+2(OH)16Cl2 · 4H2O | Trig. 3m(32/m) : R3m |
| Meixnerite | Mg6Al2(OH)16(OH)2 · 4H2O | Trig. 3m(32/m) : R3m |
| Pyroaurite | Mg6Fe3+2(OH)16[CO3] · 4H2O | Trig. 3m(32/m) : R3m |
| Reevesite | Ni6Fe3+2(OH)16(CO3) · 4H2O | Trig. 3m(32/m) : R3m |
| Stichtite | Mg6Cr3+2(OH)16[CO3] · 4H2O | Trig. 3m(32/m) : R3m |
| Takovite | Ni6Al2(OH)16[CO3] · 4H2O | Trig. 3m(32/m) : R3m |
| 'UM2002-02-COH:FeNi' | (Fe2+,Ni)6Fe3+2(CO3)(OH)16 · 4H2O | |
| Woodallite | Mg6Cr2(OH)16Cl2 · 4H2O | Trig. 3m(32/m) : R3m |
Common Associates
Associations Based on Photo Data:
| 4 photos of Kaznakhtite associated with Stichtite | Mg6Cr3+2(OH)16[CO3] · 4H2O |
| 3 photos of Kaznakhtite associated with Serpentine Subgroup | D3[Si2O5](OH)4 |
| 2 photos of Kaznakhtite associated with Heazlewoodite | Ni3S2 |
Related Minerals - Strunz-mindat Grouping
| 5.DA. | Alexkhomyakovite | K6(Ca2Na)(CO3)5Cl · 6H2O |
| 5.DA. | Amoraite | Ca12Al6(OH)36(CO3)2(SO3) · 15H2O |
| 5.DA.05 | Dypingite | Mg5(CO3)4(OH)2 · 5H2O |
| 5.DA.05 | 'UM1986-10-CO:ClHMgMnZn (also called Mineral F, Dunn, 1995)' | Mg5(Zn,Mn)3(CO3)2(OH,Cl)12 · H2O |
| 5.DA.05 | 'UM1987-01-CO:HMgS' | Mg4(CO3)2(OH)4 · 6H2O ? |
| 5.DA.05 | Giorgiosite | Mg5(CO3)4(OH)2 · 5-6H2O |
| 5.DA.05 | Hydromagnesite | Mg5(CO3)4(OH)2 · 4H2O |
| 5.DA.05 | Widgiemoolthalite | Ni5(CO3)4(OH)2 · 5H2O |
| 5.DA.10 | Artinite | Mg2(CO3)(OH)2 · 3H2O |
| 5.DA.10 | Chlorartinite | Mg2(CO3)(OH)Cl · 2H2O |
| 5.DA.10 | Indigirite | Mg2Al2(CO3)4(OH)2 · 15H2O |
| 5.DA.15 | Zaratite | Ni3(CO3)(OH)4 · 4H2O ? |
| 5.DA.15 | Otwayite | Ni2(CO3)(OH)2 · H2O |
| 5.DA.20 | Kambaldaite | NaNi4(CO3)3(OH)3 · 3H2O |
| 5.DA.25 | Callaghanite | Cu2Mg2(CO3)(OH)6 · 2H2O |
| 5.DA.30 | Claraite | (Cu,Zn)15(CO3)4(AsO4)2(SO4)(OH)14 · 7H2O |
| 5.DA.35 | Hydroscarbroite | Al14(CO3)3(OH)36 · nH2O |
| 5.DA.35 | Scarbroite | Al5(CO3)(OH)13 · 5H2O |
| 5.DA.40 | Karchevskyite | Mg18Al9(OH)54Sr2(CO3)9(H2O)6(H3O)5 |
| 5.DA.40 | 'UM1987-05-OH:AlCMg' | Mg4Al2(OH)12(CO3,SO4) · 3H2O |
| 5.DA.40 | Quintinite | Mg4Al2(OH)12(CO3) · 3H2O |
| 5.DA.40 | Charmarite | Mn2+4Al2(OH)12[CO3] · 3H2O |
| 5.DA.40 | Caresite | Fe2+4Al2(OH)12[CO3] · 3H2O |
| 5.DA.45 | 'Hydrotalcite-2H' | Mg6Al2(CO3)(OH)16 · 4H2O |
| 5.DA.45 | 'Stichtite-2H' | Mg6(Cr,Al)2(CO3)(OH)16 · 4H2O |
| 5.DA.45 | Brugnatellite | Mg6Fe3+(CO3)(OH)13 · 4H2O |
| 5.DA.45 | Zaccagnaite | Zn4Al2(OH)12[CO3] · 3H2O |
| 5.DA.45 | 'Pyroaurite-2H' | Mg6Fe3+2(OH)16(CO3) · 4H2O |
| 5.DA.45 | Liudongshengite | Zn4Cr2(OH)12(CO3) · 3H2O |
| 5.DA.45 | Chlormagaluminite | Mg4Al2(OH)12Cl2 · 3H2O |
| 5.DA.50 | Pyroaurite | Mg6Fe3+2(OH)16[CO3] · 4H2O |
| 5.DA.50 | Takovite | Ni6Al2(OH)16[CO3] · 4H2O |
| 5.DA.50 | Reevesite | Ni6Fe3+2(OH)16(CO3) · 4H2O |
| 5.DA.50 | Comblainite | Ni4Co2(OH)12[CO3] · 3H2O |
| 5.DA.50 | Marioantofilliite | [Cu4Al2(OH)12](CO3) · 3H2O |
| 5.DA.50 | Hydrotalcite | Mg6Al2(CO3)(OH)16 · 4H2O |
| 5.DA.50 | Stichtite | Mg6Cr3+2(OH)16[CO3] · 4H2O |
| 5.DA.50 | Desautelsite | Mg6Mn3+2(OH)16[CO3] · 4H2O |
| 5.DA.55 | Coalingite | Mg10Fe3+2(OH)24[CO3] · 2H2O |
| 5.DA.55 | Akopovaite | Al4Li2(OH)12(CO3)(H2O)3 |
| 5.DA.60 | Šlikite | Zn2Mg(CO3)2(OH)2 · 4H2O |
| 5.DA.65 | Marklite | Cu5(CO3)2(OH)6 · 6H2O |
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 Kaznakhtite
mindat.org URL:
https://www.mindat.org/min-55607.html
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References for Kaznakhtite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) CNMNC Newsletter No 63. Mineralogical Magazine, 85 (6) 910-915 doi:10.1180/mgm.2021.74
Kasatkin, Anatoly V., Britvin, Sergey N., Krzhizhanovskaya, Maria G., Chukanov, Nikita V., Škoda, Radek, Göttlicher, Jörg, Belakovskiy, Dmitry I., Pekov, Igor V., Levitskiy, Victor V. (2022) Kaznakhtite, Ni6Co3+2(CO3)(OH)16⋅4H2O, a new natural layered double hydroxide, the member of the hydrotalcite supergroup. Mineralogical Magazine, 86 (5) 841-848 doi:10.1180/mgm.2022.65
Kasatkin, Anatoly V., Britvin, Sergey N., Krzhizhanovskaya, Maria G., Chukanov, Nikita V., Škoda, Radek, Göttlicher, Jörg, Belakovskiy, Dmitry I., Pekov, Igor V., Levitskiy, Victor V. (2022) Kaznakhtite, Ni6Co3+2(CO3)(OH)16⋅4H2O, a new natural layered double hydroxide, the member of the hydrotalcite supergroup. Mineralogical Magazine, 86 (5) 841-848 doi:10.1180/mgm.2022.65
Localities for Kaznakhtite
Showing 2 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.
Russia (TL) | |
| Williams et al. (2014) +2 other references |
South Korea | |
| Song et al. (1998) |
Quick NavTopAbout KaznakhtiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Kaznakhtite type locality, Kaznakhtinskii ultrabasic massif, Kyzyl-Uyuk locality, Terekta Ridge, Ust-Koksinsky District, Altai Republic, Russia