Moskvinite-(Y)
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About Moskvinite-(Y)
Formula:
Na2KYSi6O15
Y may be replaced by minor REE.
Colour:
Colourless, White
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.91
Crystal System:
Orthorhombic
Name:
Named by A.A. Agakhanov, L.A. Pautov, E.V. Sokolova, F.C. Hawthorne, and V.Y. Karpenko in 2003 in honor of Alexander Veniaminovic Moskvin (1897 – 2 March 1974, Leningrad, Russia), Russian geologist and member of the Tajik-Pamirs expedition (1932–1936).
This page provides mineralogical data about Moskvinite-(Y).
Classification of Moskvinite-(Y)
Approved
Approval Year:
2002
First Published:
2003
9.CD.05
9 : SILICATES (Germanates)
C : Cyclosilicates
D : [Si3O9]6- 3-membered double rings
9 : SILICATES (Germanates)
C : Cyclosilicates
D : [Si3O9]6- 3-membered double rings
Pronounciation of Moskvinite-(Y)
Pronounciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon & Katya Ralph | United Kingdom |
Physical Properties of Moskvinite-(Y)
Vitreous
Transparency:
Transparent
Colour:
Colourless, White
Hardness:
5 on Mohs scale
Hardness:
VHN100=523 - Vickers
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.91 g/cm3 (Measured) 2.92 g/cm3 (Calculated)
Optical Data of Moskvinite-(Y)
Type:
Biaxial (+)
RI values:
nα = 1.555 nβ = 1.558 nγ = 1.566
2V:
Measured: 64° , Calculated: 63°
Max Birefringence:
δ = 0.011
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
Chemical Properties of Moskvinite-(Y)
Formula:
Na2KYSi6O15
Y may be replaced by minor REE.
Y may be replaced by minor REE.
Crystallography of Moskvinite-(Y)
Crystal System:
Orthorhombic
Cell Parameters:
a = 10.623 Å, b = 14.97 Å, c = 8.552 Å
Ratio:
a:b:c = 0.71 : 1 : 0.571
Unit Cell V:
1338.3 ų
Z:
4
Morphology:
Isometric grains to 2 mm
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.32Å | (35) |
| 4.98Å | (100) |
| 3.45Å | (50) |
| 3.26Å | (85) |
| 3.05Å | (75) |
| 2.753Å | (42) |
| 2.490Å | (45) |
Comments:
[d in .ANG.,(I/IO)(hkl)]
Type Occurrence of Moskvinite-(Y)
Geological Setting of Type Material:
Occurs in a coarse-grained reedmergnerite pegmatite
Associated Minerals at Type Locality:
Synonyms of Moskvinite-(Y)
Other Language Names for Moskvinite-(Y)
Other Information
IR Spectrum:
Band frequencies of the IR spectrum are: 413, 486, 504, 563, 629, 682, 765, 817, 937, 976, 1015, 1041, 1055, 1070, 1109 cm-1.
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 Moskvinite-(Y)
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Agakhanov, A.A., Pautov, L.A., Sokolova, E.V., Hawthorne, F.C., and Karpenko, V.Y. (2003) Moskvinite-(Y), Na2K(Y,REE)[Si6O15], a new mineral. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 132: 15-21. (in Russian)
Sokolova, E., Hawthorne, F.C., Agakhanov, A.A., Pautov, L.A. (2003) The crystal structure of moskvinite-(Y), Na2K(Y,REE)[Si6O15], a new silicate mineral with [Si6O15] three-membered double rings from the Dara-i-Pioz moraine, Tien-Shan Mountains, Tajikistan. Canadian Mineralogist: 41: 513-520.
Jambor, J.L., Roberts, A.C. (2004) New mineral names. American Mineralogist: 89: 1826-1834.
Mandarino, J.A. (2004) New minerals. The Canadian Mineralogist: 42: 1901-1927.
Pekov, I.V. (2007) New minerals from former Soviet Union countries, 1998-2006: new minerals approved by the IMA commission on new minerals and mineral names. Mineralogical Almanac: 11: 9-51.
Friis, H. (2016) First occurrence of moskvinite-(Y) in the Ilímaussaq alkaline complex, South Greenland – implications for rare-earth element mobility. Mineralogical Magazine: 80: 31-41.
Internet Links for Moskvinite-(Y)
mindat.org URL:
https://www.mindat.org/min-27552.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Moskvinite-(Y)
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Denmark | |
| Friis, H. (2016). First occurrence of moskvinite-(Y) in the Ilímaussaq alkaline complex, South Greenland–implications for rare-earth element mobility. Mineralogical Magazine, 80(1), 31-41. |
Tajikistan (TL) | |
| Agakhanov, A.A., Pautov, L.A., Sokolova, E.V., Hawthorne, F.C., and Karpenko, V.Y. (2003) Moskvinite-(Y), Na2K(Y,REE)[Si6O15], a new mineral. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 132: 15-21.; Sokolova, E., Hawthorne, F.C., Agakhanov, A.A., Pautov, L.A. (2003) The crystal structure of moskvinite-(Y), Na2K(Y,REE)[Si6O15], a new silicate mineral with [Si6O15] three-membered double rings from the Dara-i-Pioz moraine, Tien-Shan Mountains, Tajikistan. Canadian Mineralogist: 41: 513-520. |
Dara-i-Pioz Glacier, Districts of Republican Subordination, Tajikistan