Mineralogy Database

Chkalovite Mineral Data

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General Chkalovite Information

Help on Chemical  Formula: Chemical Formula: Na2BeSi2O6
Help on Composition: Composition: Molecular Weight = 207.16 gm
   Sodium     22.20 %  Na   29.92 % Na2O
   Beryllium   4.35 %  Be   12.07 % BeO
   Silicon    27.11 %  Si   58.01 % SiO2
   Oxygen     46.34 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Be(Si2O6)
Help on Environment: Environment: In veins in pegmatite in a differentiated alkalic massif.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1939
Help on Locality: Locality: Mt. Punkaruaiv, Lovozero massif, and in the Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Valerii Pavlovich Chkalov (1904{1938), the first to fly nonstop from Moscow to the USA across the North Pole.
Help on Synonym: Synonym: ICSD 34075
  PDF 42-572

Chkalovite Image

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Comments: Massive, white chkalovite associated with dark aegerine.
Location: Ilimaussaq, Tasseq, Greenland. Scale: 4.5 x 3 cm.
© John Veevaert

Chkalovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1:1:0.3255
Help on Cell Dimensions: Cell Dimensions: a = 21.1, b = 21.1, c = 6.87, Z = 24; V = 3,058.59 Den(Calc)= 2.70
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: F dd2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.48(1), 4.02(1), 2.76(0.9),

Physical Properties of Chkalovite

Help on Cleavage: Cleavage: {100} Fair, {0kl} Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.662
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Equant Grains - Granular material with equel dimensions in x, y, and z.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white

Optical Properties of Chkalovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2023,KPDmeas= 0.2052,KC= 0.2065
Ncalc = 1.55 - 1.56
Help on Optical Data: Optical Data: Biaxial (+), a=1.544, b=1.546, g=1.549, bire=0.0050, 2V(Calc)=80, 2V(Meas)=78.

Calculated Properties of Chkalovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Chkalovite =2.66 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEChkalovite = 1.43 barns/electron
U=PEChkalovite x rElectron Density= 3.75 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chkalovite is Not Radioactive

Chkalovite Classification

Help on  Dana Class: Dana Class: (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.05)with chains P=6
  (65.05.02)Dana Group Chkalovite Na2BeSi2O6 F dd2 mm2
Help on  Strunz Class: Strunz Class: 09.DM.20 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DM -Inosilicates with 6-periodic single chains
09.DM.20 Chkalovite Na2BeSi2O6 F dd2 mm2

Other Chkalovite 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 Chkalovite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info

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Dana No: Strunz No: 09.DM.20





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