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 (Александр Вениаминович Москвин) (1897 – 2 March 1974, Leningrad, Russia), Russian geologist and member of the Tajik-Pamirs expedition (1932–1936). He was first to identify the Dara-i-Pioz alkaline massif.

Type Locality:

ⓘ Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan

This page provides mineralogical data about Moskvinite-(Y).

Unique IdentifiersHide

Mindat ID:

27552

Long-form identifier:

mindat:1:1:27552:1

GUID
(UUID V4):

e9674906-ef2e-4e78-997b-058211d46d79

IMA Classification of Moskvinite-(Y)Hide

IMA status:

Approved

Approval year:

2002

First published:

2003

Type description reference:

Agakhanov, A. A., Pautov, L. A., Sokolova, E. V., Hawthorne, F. C., Karpenko, V. Y. (2003) Moskvinite-(Y), Na₂K(Y, REE)[Si₆O₁₅], a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 132 (6) 15-21

Classification of Moskvinite-(Y)Hide

Strunz-mindat (2024):

9.CD.05

9 : SILICATES (Germanates)
C : Cyclosilicates
D : [Si₃O₉]₆- 3-membered double rings

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Mskv-Y	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of Moskvinite-(Y)Hide

Pronunciation:

Play	Recorded by	Country
	Jolyon Ralph	United Kingdom

Physical Properties of Moskvinite-(Y)Hide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Colourless, White

Streak:

white

Hardness:

5 on Mohs scale

Hardness:

VHN₁₀₀=523 - Vickers

Hardness Data:

Measured

Tenacity:

Brittle

Cleavage:

None Observed

Fracture:

Irregular/Uneven

Density:

2.91(1) g/cm³ (Measured) 2.92 g/cm³ (Calculated)

Optical Data of Moskvinite-(Y)Hide

Type:

Biaxial (-)

RI values:

n_α = 1.555 n_β = 1.558 n_γ = 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.

Surface Relief:

Low

Chemistry of Moskvinite-(Y)Hide

Mindat Formula:

Na₂KYSi₆O₁₅

Y may be replaced by minor REE.

Elements listed:

K, Na, O, Si, Y - search for minerals with similar chemistry

Crystallography of Moskvinite-(Y)Hide

Crystal System:

Orthorhombic

Class (H-M):

mmm (2/m 2/m 2/m) - Dipyramidal

Cell Parameters:

a = 10.623(2) Å, b = 14.970(2) Å, c = 8.552(2) Å

Ratio:

a:b:c = 0.71 : 1 : 0.571

Unit Cell V:

1338.3 Å³

Morphology:

Isometric grains to 2 mm

Comment:

Space Group: Ibmm.

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0005835	Moskvinite-(Y)	Sokolova E V, 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 The Canadian Mineralogist 41 513-520		2003	Dara-I-Pioz Moraine, Tien-Shan mountains, Tajikistan	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Moskvinite-(Y)'
loop_
_publ_author_name
'Sokolova E V'
'Hawthorne F C'
'Agakhanov A A'
'Pautov L A'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 41 
_journal_year 2003
_journal_page_first 513
_journal_page_last 520
_publ_section_title
;
 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
;
_database_code_amcsd 0005835
_chemical_compound_source 'Dara-I-Pioz Moraine, Tien-Shan mountains, Tajikistan'
_chemical_formula_sum 'Na2 K (Y.77 Dy.09 Gd.04 Er.04 Ho.02 Sm.02 Nd.01 Tb.01) Si6 O15'
_cell_length_a 10.623
_cell_length_b 14.970
_cell_length_c 8.553
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1360.152
_exptl_crystal_density_diffrn      2.925
_symmetry_space_group_name_H-M 'I b m m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,y,1/2-z'
  '1/2+x,1/2+y,-z'
  '-x,-y,1/2+z'
  '1/2-x,1/2-y,+z'
  'x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,y,1/2+z'
  '1/2-x,1/2+y,+z'
  'x,-y,1/2-z'
  '1/2+x,1/2-y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Na   0.50000   0.25636   0.00000   1.00000   0.01780
K   0.43056   0.00000   0.25000   1.00000   0.02540
Y   0.25000   0.25000   0.25000   0.77000   0.00679
Dy   0.25000   0.25000   0.25000   0.09000   0.00679
Gd   0.25000   0.25000   0.25000   0.04000   0.00679
Er   0.25000   0.25000   0.25000   0.04000   0.00679
Ho   0.25000   0.25000   0.25000   0.02000   0.00679
Sm   0.25000   0.25000   0.25000   0.02000   0.00679
Nd   0.25000   0.25000   0.25000   0.01000   0.00679
Tb   0.25000   0.25000   0.25000   0.01000   0.00679
Si1   0.53384   0.40003   0.25000   1.00000   0.00943
Si2   0.22002   0.39603  -0.07776   1.00000   0.00934
O1   0.15917   0.37118  -0.25000   1.00000   0.01380
O2   0.43311   0.32256   0.25000   1.00000   0.01290
O3   0.37260   0.38915  -0.09771   1.00000   0.01290
O4   0.18101   0.50000  -0.04480   1.00000   0.01550
O5   0.16655   0.33667   0.05854   1.00000   0.01360
O6   0.47510   0.50000   0.25000   1.00000   0.01400
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Na 0.01680 0.01670 0.01970 0.00000 0.00510 0.00000
K 0.02340 0.03730 0.01540 0.00000 0.00000 0.00000
Y 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Dy 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Gd 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Er 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Ho 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Sm 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Nd 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Tb 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Si1 0.00830 0.00930 0.01080 -0.00130 0.00000 0.00000
Si2 0.01000 0.00910 0.00890 0.00008 0.00047 0.00111
O1 0.01160 0.01920 0.01070 -0.00250 0.00000 0.00000
O2 0.01090 0.01230 0.01540 -0.00380 0.00000 0.00000
O3 0.01010 0.01730 0.01140 0.00000 0.00030 0.00110
O4 0.01700 0.00860 0.02110 0.00000 0.00340 0.00000
O5 0.01390 0.01430 0.01270 -0.00120 -0.00100 0.00500
O6 0.01390 0.00970 0.01840 0.00000 0.00000 0.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
5.32 Å	(35)
4.98 Å	(100)
3.45 Å	(50)
3.26 Å	(85)
3.05 Å	(75)
2.753 Å	(42)
2.490 Å	(45)

Comments:

[d in .ANG.,(I/IO)(hkl)]

Geological EnvironmentHide

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 Moskvinite-(Y)Hide

Type Locality:

ⓘ Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan

Place of Conservation of Type Material:

A.E. Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia

Geological Setting of Type Material:

Occurs in a coarse-grained reedmergnerite pegmatite

Associated Minerals at Type Locality:

Telyushenkoite	Shibkovite	Shibkovite	Polylithionite	Microcline
Leucophanite	Kentbrooksite	Hyalotekite	Albite

Reference:

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)

Synonyms of Moskvinite-(Y)Hide

IMA2002-031

Other Language Names for Moskvinite-(Y)Hide

Russian:Москвинит-(Y)

Simplified Chinese:莫斯克文石

Traditional Chinese:莫斯克文石

Other InformationHide

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.

Internet Links for Moskvinite-(Y)Hide

mindat.org URL:

https://www.mindat.org/min-27552.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for Moskvinite-(Y)Hide

Reference List:

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. The Canadian Mineralogist, 41 (2) 513-520 doi:10.2113/gscanmin.41.2.513

Jambor, J.L., Roberts, A.C. (2004) New mineral names. American Mineralogist: 89: 1826-1834.

Mandarino, Joseph A. (2004) New minerals. The Canadian Mineralogist, 42 (6) 1901-1927 doi:10.2113/gscanmin.42.6.1901

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, Henrik (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 doi:10.1180/minmag.2016.080.047

(2023) Moskvinite-(Y) Handbook of Mineralogy. Mineralogical Society of America

Localities for Moskvinite-(Y)Hide

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 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.


Greenland
Kujalleq Ilímaussaq complex Kuannersuit Plateau (Kvanefjeld) ⓘ Kvanefjeld deposit	Friis (2016)

Tajikistan (TL)
Districts of Republican Subordination ⓘ Dara-i-Pioz Massif (TL)	Agakhanov et al. (2003) +1 other reference