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Alexkhomyakovite

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About AlexkhomyakoviteHide

04863800015790541218194.jpg
Alexander P. Khomyakov
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 mineral khomyakovite is also named for him.
This page provides mineralogical data about Alexkhomyakovite.


Classification of AlexkhomyakoviteHide

Approved
Approval Year:
2015
First Published:
2019
5.DA.

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations

Physical Properties of AlexkhomyakoviteHide

Vitreous, Greasy
Transparency:
Transparent, Translucent
Colour:
Colourless, white or grey
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.25(1) g/cm3 (Measured)    2.196 g/cm3 (Calculated)

Optical Data of AlexkhomyakoviteHide

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.
Surface Relief:
Low

Chemical Properties of AlexkhomyakoviteHide

Formula:
K6(Ca2Na)(CO3)5Cl·6H2O
IMA Formula:
K6(Ca2Na)(CO3)5Cl · 6H2O

Crystallography of AlexkhomyakoviteHide

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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.96Å(27)
3.486Å(35)
3.011Å(100)
2.977Å(32)
2.676Å(36)
2.626Å(42)
2.206Å(26)
1.982Å(17)
Comments:
From Type Description.

Type Occurrence of AlexkhomyakoviteHide

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 AlexkhomyakoviteHide

Related Minerals - Nickel-Strunz GroupingHide

5.DA.05DypingiteMg5(CO3)4(OH)2 · 5H2OMon.
5.DA.05GiorgiositeMg5(CO3)4(OH)2 · 5-6H2O
5.DA.05HydromagnesiteMg5(CO3)4(OH)2 · 4H2OMon.
5.DA.05WidgiemoolthaliteNi5(CO3)4(OH)2 · 5H2OMon.
5.DA.05UM1986-10-CO:ClHMgMnZn (also called Mineral F, Dunn, 1995)Mg5(Zn,Mn)3(CO3)2(OH,Cl)12 · H2O
5.DA.05UM1987-01-CO:HMgSMg4(CO3)2(OH)4 · 6H2O ?Mon.
5.DA.10ArtiniteMg2(CO3)(OH)2 · 3H2OMon.
5.DA.10IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
5.DA.10ChlorartiniteMg2(CO3)(OH)Cl · 2H2OTrig. 3m : R3c
5.DA.15OtwayiteNi2(CO3)(OH)2 · H2OOrth.
5.DA.15ZaratiteNi3(CO3)(OH)4 · 4H2O ?Iso.
5.DA.20KambaldaiteNaNi4(CO3)3(OH)3 · 3H2OHex.
5.DA.25CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2OMon.
5.DA.30Claraite(Cu,Zn)15(CO3)4(AsO4)2(SO4)(OH)14·7H2OTric.
5.DA.35HydroscarbroiteAl14(CO3)3(OH)36 · nH2OTric.
5.DA.35ScarbroiteAl5(CO3)(OH)13 · 5H2OHex.
5.DA.40CaresiteFe2+4Al2(OH)12[CO3] · 3H2OTrig.
5.DA.40QuintiniteMg4Al2(OH)12(CO3) · 3H2OHex. 6 2 2 : P63 2 2
5.DA.40CharmariteMn2+4Al2(OH)12[CO3] · 3H2O
5.DA.45Stichtite-2HMg6(Cr,Al)2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2OHex.
5.DA.45ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
5.DA.45Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45Pyroaurite-2HMg6Fe3+2(OH)16(CO3) · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2OHex.
5.DA.50ComblainiteNi4Co2(OH)12[CO3] · 3H2OTrig.
5.DA.50DesautelsiteMg6Mn3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m)
5.DA.50HydrotalciteMg6Al2(CO3)(OH)16 · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50PyroauriteMg6Fe3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50ReevesiteNi6Fe3+2(OH)16(CO3) · 4H2OTrig.
5.DA.50StichtiteMg6Cr3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50TakoviteNi6Al2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50UM1998-10-CO:CoHNiNi6Co2(CO3)(OH)16 · 4H2O
5.DA.55CoalingiteMg10Fe3+2(OH)24[CO3] · 2H2OTrig.

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.

References for AlexkhomyakoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Lykova, I.S., Chukanov, N.V., Belakovskiy, D.I., Britvin, S.N., Turchkova, A.G. and Pushcharovsky, D.Y. (2015) Alexkhomyakovite, IMA 2015-013. CNMNC Newsletter No. 25, June 2015, page 534. Mineralogical Magazine: 79: 529-535.
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.

Internet Links for AlexkhomyakoviteHide

Localities for AlexkhomyakoviteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Murmansk Oblast
    • Khibiny Massif
      • Koashva Mt
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Lykova, I.S., Chukanov, N.V., Belakovskiy, D.I., Britvin, S.N., Turchkova, A.G. and Pushcharovsky, D.Y. (2015) Alexkhomyakovite, IMA 2015-013. CNMNC Newsletter No. 25, June 2015, page 534; Mineralogical Magazine, 79, 529-535.
 
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