Alexkhomyakovite
A valid IMA mineral species
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About Alexkhomyakovite
Formula:
K6(Ca2Na)(CO3)5Cl · 6H2O
Colour:
Colourless, white or grey
Lustre:
Vitreous, Greasy
Hardness:
3
Specific Gravity:
2.25
Crystal System:
Hexagonal
Name:
Named in honour of Alexander Petrovich Khomyakov (Александр Петрович Хомяков) (2 April 1933, Moscow, Russia – 12 October 2012, Moscow, Russia), mineralogist and Director of the Institute of Mineralogy, Geochemistry and Crystal Chemistry of Rare Elements. He described more than 100 new minerals. The minerals khomyakovite and manganokhomyakovite are also named for him.
This page provides mineralogical data about Alexkhomyakovite.
Unique Identifiers
Mindat ID:
46633
Long-form identifier:
mindat:1:1:46633:6
GUID
(UUID V4):
(UUID V4):
d455873d-1251-4e99-a4af-345c03080218
IMA Classification of Alexkhomyakovite
Approved
Approval year:
2015
First published:
2019
Type description reference:
Pekov, Igor V., Zubkova, Natalia V., Yapaskurt, Vasiliy O., Lykova, Inna S., Chukanov, Nikita V., Belakovskiy, Dmitry I., Britvin, Sergey N., Turchkova, Anna G., Pushcharovsky, Dmitry Y. (2019) Alexkhomyakovite, K6(Ca2Na)(CO3)5Cl · 6H2O, a new mineral from the Khibiny alkaline complex, Kola peninsula, Russia. European Journal of Mineralogy, 31 (1) 135-143 doi:10.1127/ejm/2018/0030-2798
Classification of Alexkhomyakovite
5.DA.
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 |
---|---|---|
Akmy | 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 Alexkhomyakovite
Vitreous, Greasy
Transparency:
Transparent, Translucent
Colour:
Colourless, white or grey
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.25(1) g/cm3 (Measured) 2.196 g/cm3 (Calculated)
Optical Data of Alexkhomyakovite
Type:
Uniaxial (-)
RI values:
nω = 1.543(2) nε = 1.476(2)
Max Birefringence:
δ = 0.067
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Chemistry of Alexkhomyakovite
Mindat Formula:
K6(Ca2Na)(CO3)5Cl · 6H2O
Crystallography of Alexkhomyakovite
Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mcm
Setting:
P63/mcm
Cell Parameters:
a = 9.2691(2) Å, c = 15.8419(4) Å
Ratio:
a:c = 1 : 1.709
Unit Cell V:
1178.72 ų
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
7.96 Å | (27) |
3.486 Å | (35) |
3.011 Å | (100) |
2.977 Å | (32) |
2.676 Å | (36) |
2.626 Å | (42) |
2.206 Å | (26) |
1.982 Å | (17) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Alexkhomyakovite
General Appearance of Type Material:
Equant grains up to 0.2 mm, veinlets up to 3 cm long and up to 1 mm thick and fine-grained aggregates replacing delhayelite
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 4696/1
Geological Setting of Type Material:
peralkaline pegmatite
Reference:
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Lykova, I.S., Chukanov, N.V., Belakovskiy, D.I., Britvin, S.N., Turchkova, A.G., Pushcharovsky, D.Y. (2019) Alexkhomyakovite, K6(Ca2Na)(CO3)5Cl∙6H2O, a new mineral from the Khibiny alkaline complex, Kola peninsula, Russia. European Journal of Mineralogy: 31(1): 135–143.
Download:
Synonyms of Alexkhomyakovite
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Alexkhomyakovite associated with Villiaumite | NaF |
1 photo of Alexkhomyakovite associated with Thermonatrite | Na2CO3 · H2O |
1 photo of Alexkhomyakovite associated with Natrite | Na2CO3 |
Related Minerals - Strunz-mindat Grouping
5.DA. | Amoraite | Ca12Al6(OH)36(CO3)2(SO3) · 15H2O |
5.DA.05 | Dypingite | Mg5(CO3)4(OH)2 · 5H2O |
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.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.10 | Artinite | Mg2(CO3)(OH)2 · 3H2O |
5.DA.10 | Indigirite | Mg2Al2(CO3)4(OH)2 · 15H2O |
5.DA.10 | Chlorartinite | Mg2(CO3)(OH)Cl · 2H2O |
5.DA.15 | Otwayite | Ni2(CO3)(OH)2 · H2O |
5.DA.15 | Zaratite | Ni3(CO3)(OH)4 · 4H2O ? |
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 | Caresite | Fe2+4Al2(OH)12[CO3] · 3H2O |
5.DA.40 | Quintinite | Mg4Al2(OH)12(CO3) · 3H2O |
5.DA.40 | Charmarite | Mn2+4Al2(OH)12[CO3] · 3H2O |
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.45 | Stichtite-2H | Mg6(Cr,Al)2(CO3)(OH)16 · 4H2O |
5.DA.45 | Brugnatellite | Mg6Fe3+(CO3)(OH)13 · 4H2O |
5.DA.45 | Chlormagaluminite | Mg4Al2(OH)12Cl2 · 3H2O |
5.DA.45 | Hydrotalcite-2H | Mg6Al2(CO3)(OH)16 · 4H2O |
5.DA.45 | Pyroaurite-2H | Mg6Fe3+2(OH)16(CO3) · 4H2O |
5.DA.45 | Zaccagnaite | Zn4Al2(OH)12[CO3] · 3H2O |
5.DA.45 | Liudongshengite | Zn4Cr2(OH)12(CO3) · 3H2O |
5.DA.50 | Comblainite | Ni4Co2(OH)12[CO3] · 3H2O |
5.DA.50 | Desautelsite | Mg6Mn3+2(OH)16[CO3] · 4H2O |
5.DA.50 | Hydrotalcite | Mg6Al2(CO3)(OH)16 · 4H2O |
5.DA.50 | Pyroaurite | Mg6Fe3+2(OH)16[CO3] · 4H2O |
5.DA.50 | Reevesite | Ni6Fe3+2(OH)16(CO3) · 4H2O |
5.DA.50 | Stichtite | Mg6Cr3+2(OH)16[CO3] · 4H2O |
5.DA.50 | Takovite | Ni6Al2(OH)16[CO3] · 4H2O |
5.DA.50 | Kaznakhtite | Ni6Co3+2(CO3)(OH)16 · 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 Alexkhomyakovite
mindat.org URL:
https://www.mindat.org/min-46633.html
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References for Alexkhomyakovite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2015, CNMNC Newsletter No 25. Mineralogical Magazine, 79 (3) 529-535 doi:10.1180/minmag.2015.079.3.02
Pekov, Igor V., Zubkova, Natalia V., Yapaskurt, Vasiliy O., Lykova, Inna S., Chukanov, Nikita V., Belakovskiy, Dmitry I., Britvin, Sergey N., Turchkova, Anna G., Pushcharovsky, Dmitry Y. (2019) Alexkhomyakovite, K6(Ca2Na)(CO3)5Cl · 6H2O, a new mineral from the Khibiny alkaline complex, Kola peninsula, Russia. European Journal of Mineralogy, 31 (1) 135-143 doi:10.1127/ejm/2018/0030-2798
Localities for Alexkhomyakovite
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.
Russia (TL) | |
| Hålenius et al. (2015) +1 other reference |
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Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia