Mineralogy Database

Vlasovite Mineral Data

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General Vlasovite Information

Help on Chemical  Formula: Chemical Formula: Na2ZrSi4O11
Help on Composition: Composition: Molecular Weight = 425.54 gm
   Sodium     10.81 %  Na   14.56 % Na2O
   Zirconium  21.44 %  Zr   28.96 % ZrO2
   Silicon    26.40 %  Si   56.48 % SiO2
   Oxygen     41.36 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2ZrSi4O11
Help on Environment: Environment: A late phase in nepheline syenites, syenitic pegmatites, and along the contact zone of a differentiated alkalic massif.
Help on IMA Status: IMA Status: Approved IMA 1961
Help on Locality: Locality: Mt. Vavnbed, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Kuz'ma Alekseevich Vlasov (1905-1964), founder of the Institute of Mineralogy, Geochemistry, and Crystal Chemistry of Rare Elements, Moscow, Russia.
Help on Name Pronunciation: Name Pronunciation: Vlasovite + Pronunciation Say VLASOVITE
Help on Synonym: Synonym: ICSD 6267
  PDF 39-208

Vlasovite Image

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  Vlasovite   Eudialyte

Comments: Transparent yellow-gray vlasovite crystal frozen in pink eudialyte matrix.
Location: Kipawa alkaline complex, near Sheffield Lake, Villedieu Township, Témiscamingue Co., Québec, Canada. Scale: 2x2x1 cm.
© John Betts - Fine Minerals

Vlasovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0979:1:0.852
Help on Cell Dimensions: Cell Dimensions: a = 10.98, b = 10, c = 8.52, Z = 4; beta = 100.4° V = 920.13 Den(Calc)= 3.07
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.26(1), 2.966(0.94), 5.02(0.72),

Physical Properties of Vlasovite

Help on Cleavage: Cleavage: {010} Distinct
Help on Color: Color: Colorless.
Help on Density: Density: 2.97
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luminescence: Luminescence: Fluorescent, Short UV=strong orange-yellow, Long UV=strong orange-yellow.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white

Optical Properties of Vlasovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2017,KPDmeas= 0.2085,KC= 0.2062
Ncalc = 1.61 - 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.607, b=1.623, g=1.628, bire=0.0210
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.

Calculated Properties of Vlasovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.88 gm/cc
note: Specific Gravity of Vlasovite =2.97 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEVlasovite = 29.66 barns/electron
U=PEVlasovite x rElectron Density= 85.30 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vlasovite is Not Radioactive

Vlasovite Classification

Help on  Dana Class: Dana Class: (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.02)with P=2 non-amphibole configuration
  (66.02.02)Dana Group Vlasovite Na2ZrSi4O11 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.DM.25 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DM -Inosilicates with 6-periodic single chains
09.DM.25 Vlasovite Na2ZrSi4O11 C 2/c 2/m

Other Vlasovite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Vlasovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 09.DM.25





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