Mineralogy Database

Chesnokovite Mineral Data

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General Chesnokovite Information

Help on Chemical  Formula: Chemical Formula: Na2[SiO2(OH)2]•8H2O
Help on Composition: Composition: Molecular Weight = 277.56 gm
   Potassium   0.28 %  K     0.34 % K2O
   Sodium     16.57 %  Na   22.33 % Na2O
   Silicon    10.17 %  Si   21.76 % SiO2
   Hydrogen    6.23 %  H    55.69 % H2O
   Oxygen     66.75 %  O
             ______        ______ 
             100.00 %      100.12 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2K0.02(O)2(OH)2•7.58(H2O)
Help on Environment: Environment: Found in an ussingite vein uncovered by underground mining where it occurs as intergrowths with natrophospate in pockets. New structure type. Alters to opal.
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Karnasurt mine, Mountain Kedykverpakhk, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for B.V. Chesnokov (1928-2005), an outstanding mineralogist.
Help on Synonym: Synonym: IMA2006-007

Chesnokovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.69:1:0.6813
Help on Cell Dimensions: Cell Dimensions: a = 11.7119, b = 16.973, c = 11.5652, Z = 8; V = 2,299.00 Den(Calc)= 1.60
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: I bca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.774(1), 2.8(0.97), 3.847(0.89),2.832(0.42), 2.932(0.42), 4.788(0.42), 5.001(0.3), 2.035(0.2),

Physical Properties of Chesnokovite

Help on Cleavage: Cleavage: {010} Perfect, {100} Distinct, {001} Distinct
Help on Color: Color: Colorless, White, Pale brownish yellow.
Help on Density: Density: 1.68
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Stepped - Fracture surfaces resemble stair case steps
Help on Habit: Habit: Deliquescent - Crystals absorb water from the air and melt or otherwise deteriorate.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Chesnokovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2833,KPDmeas= 0.2698,KC= 0.2777
Ncalc = 1.44 - 1.47
Help on Optical Data: Optical Data: Biaxial (+), a=1.449, b=1.453, g=1.458, bire=0.0090

Calculated Properties of Chesnokovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.69 gm/cc
note: Specific Gravity of Chesnokovite =1.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0050792144
Boson Index = 0.9949207856
Help on Photoelectric: Photoelectric: PEChesnokovite = 0.84 barns/electron
U=PEChesnokovite x relectron= 1.42 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Chesnokovite per GRapi unit = 23.44 (%)

Estimated Radioactivity from Chesnokovite - barely detectable


Chesnokovite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.14)Dana Group Spadaite MgSiO2(OH)2•(H2O)(?) Ortho Chesnokovite! Na2[SiO2(OH)2]•8H2O I bca 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.AC.20 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AC -Nesosilicates without additional anions;
09.AC.20 Chesnokovite! Na2[SiO2(OH)2]•8H2O I bca 2/m 2/m 2/m

Other Chesnokovite Information

Help on References: References: NAME( Geology of Ore Deposits v49:727) PHYS. PROP.(Geology of Ore Deposits v49:727) OPTIC PROP.(Geology of Ore Deposits v49:727)
Help on See Also: See Also: Links to other databases for Chesnokovite :
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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Dana No: Strunz No: 09.AC.20





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