Moskvinite-(Y) Mineral Data

Moskvinite-(Y) Mineral Data
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General Moskvinite-(Y) Information

Help on Chemical Formula: Chemical Formula: Na2K(Y,REE) [Si6O15]
Help on Composition: Composition: Molecular Weight = 598.41 gm
   Potassium    6.21 %  K     7.48 % K2O
   Sodium       7.91 %  Na   10.67 % Na2O
   Samarium     0.50 %  Sm    0.58 % Sm2O3
   Gadolinium   1.05 %  Gd    1.21 % Gd2O3
   Dysprosium   2.44 %  Dy    2.80 % Dy2O3
   Yttrium     11.44 %  Y    14.53 % Y2O3
   Holmium      0.55 %  Ho    0.63 % Ho2O3
   Erbium       1.12 %  Er    1.28 % Er2O3
   Terbium      0.27 %  Tb    0.31 % Tb2O3
   Silicon     28.16 %  Si   60.24 % SiO2
   Neodymium    0.24 %  Nd    0.28 % Nd2O3
   Oxygen      40.11 %  O
              ______        ______ 
              100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2.06K0.95Y0.77Dy0.09Gd0.04Er0.04Ho0.02Sm0.02Nd0.01Tb0.01Si6O15
Help on Environment: Environment: Coarse-grained reedmergnerite pegmatite boulder in the moraine. K and REE analogue of Na3 Y [Si6O15] - 3 membered double ring.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Moraine of the Dara-i-Pioz glacier, Alai mountain ridge, Tien-Shan Mountains, northern Tajikistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for A.V. Moskvin (1897-1974), Russian geologist.
Help on Synonym: Synonym: IMA2002-031
 

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Moskvinite-(Y) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.7096:1:0.5713
Help on Cell Dimensions: Cell Dimensions: a = 10.623, b = 14.97, c = 8.553, Z = 4; V = 1,360.15 Den(Calc)= 2.92
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Ibmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.98(1)(121), 3.26(0.85)(141), 3.05(0.75)(240,222),3.45(0.5)(310), 2.49(0.45)(060,242), 2.753(0.42)(103), 5.32(0.35),
Click Here for Large Moskvinite-(Y) Structure Window Crystal Structure:

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Sokolova E V , Hawthorne F C , Agakhanov A A , Pautov L A , The Canadian Mineralogist , 41 (2003) p.513-520, 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, Locality: Dara-I-Pioz Moraine, Tien-Shan mountains, Tajikistan

 

Physical Properties of Moskvinite-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: White.
Help on Density: Density: 2.91
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Moskvinite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1917,KPDmeas= 0.1923,KC= 0.1932
Ncalc = 1.56
Help on Optical Data: Optical Data: Biaxial (+), a=1.555, b=1.558, g=1.566, bire=0.0110, 2V(Calc)=64, 2V(Meas)=64. Dispersion r > v moderate.
 

Calculated Properties of Moskvinite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.82 gm/cc
note: Specific Gravity of Moskvinite-(Y) =2.91 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEMoskvinite-(Y) = 60.78 barns/electron
U=PEMoskvinite-(Y) x relectron= 171.31 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 6,494.10 (Gamma Ray American Petroleum Institute Units)
Concentration of Moskvinite-(Y) per GRapi unit = 153.99 (PPM)

Moskvinite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Moskvinite-(Y) - mild
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Becquerels
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 8.69 cm 140,806 3.81E-06 6,494.10 2.14
100 gm / 4.03 cm 14,081 3.81E-07 649.41 0.21
10 gm / 1.87 cm 1,408 3.81E-08 64.94 0.02
1 gm / 8.69 mm 141 3.81E-09 6.49 0.00
0.1 gm / 4.03 mm 14 3.81E-10 0.65 0.00
0.01 gm / 1.87 mm 1 3.81E-11 0.06 0.00
0.001 gm / 0.87 mm 0 3.81E-12 0.01 0.00

Weight of pure Moskvinite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.91 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.31 % Th) From Sum REE Elements ( 6.17 % REE)
 

Moskvinite-(Y) Classification
Help on Dana Class: Dana Class: 63.03.01.01 (63)Cyclosilicate Condensed Rings
  (63.03)3-membered rings
  (63.03.01)Dana Group
 
63.03.01.01 Moskvinite-(Y)! Na2K(Y,REE)[Si6O15] Ibmm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 09.CD.05 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CD -[Si3O9]6- 3-membered double rings
 
09.CD.05 Moskvinite-(Y)! Na2K(Y,REE)[Si6O15] Ibmm 2/m 2/m 2/m
 

Other Moskvinite-(Y) Information
Help on References: References: NAME( CanMin, 41:513, AmMin 89:1831) PHYS. PROP.(CanMin 41:513, AmMin 89:1831) OPTIC PROP.(AmMin 89:1831)
Help on See Also: See Also: Links to other databases for Moskvinite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Moskvinite-(Y) Specimen Label here :

Moskvinite-(Y)

Na2K(Y,REE) [Si6O15]
Dana No: 63.03.01.01 Strunz No: 09.CD.05
Locality:

 

Notes: