Mineralogy Database

Grumantite Mineral Data

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General Grumantite Information

Help on Chemical  Formula: Chemical Formula: NaHSi2O5•(H2O)
Help on Composition: Composition: Molecular Weight = 178.18 gm
   Sodium    12.90 %  Na   17.39 % Na2O
   Silicon   31.52 %  Si   67.44 % SiO2
   Hydrogen   1.70 %  H    15.17 % H2O
   Oxygen    53.88 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaHSi2O5•(H2O)
Help on Environment: Environment: Found as fine-grained compact veins with ussingite margins.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Mt. Alluaiev, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the old Russian name for the Spitzbergen Archipelago, Arctic Ocean.
Help on Name Pronunciation: Name Pronunciation: Grumantite + Pronunciation Say GRUMANTITE
Help on Synonym: Synonym: ICSD 39749
  PDF 42-1331

Grumantite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8755:1:0.3923
Help on Cell Dimensions: Cell Dimensions: a = 15.979, b = 18.25, c = 7.16, Z = 16; V = 2,087.98 Den(Calc)= 2.27
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): 3.006(1), 3.505(1), 6.2(1),

Physical Properties of Grumantite

Help on Cleavage: Cleavage: {110} Perfect
Help on Color: Color: White, Snow white.
Help on Density: Density: 2.21
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Compact - Occurs as a compact mass.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Fluorescent, Short UV=weak bluish white.
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white

Optical Properties of Grumantite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2238,KPDmeas= 0.2299,KC= 0.2249
Ncalc = 1.5 - 1.51
Help on Optical Data: Optical Data: Biaxial (+), a=1.494, b=1.507, g=1.523, bire=0.0290, 2V(Calc)=86, 2V(Meas)=85. Dispersion weak, r > v.

Calculated Properties of Grumantite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Grumantite =2.27 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGrumantite = 1.45 barns/electron
U=PEGrumantite x rElectron Density= 3.32 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Grumantite is Not Radioactive

Grumantite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.04)possible inosilicates
  (78.04.05)Dana Group Grumantite NaHSi2O5•(H2O) F dd2 mm2
Help on  Strunz Class: Strunz Class: 09.EH.10 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EH -Transitional structures between phyllosilicate and other silicate units
09.EH.10 Grumantite NaHSi2O5•(H2O) F dd2 mm2

Other Grumantite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Grumantite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.EH.10





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