Mineralogy Database

Khibinskite Mineral Data

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General Khibinskite Information

Help on Chemical  Formula: Chemical Formula: K2ZrSi2O7
Help on Composition: Composition: Molecular Weight = 337.59 gm
   Potassium  23.16 %  K    27.90 % K2O
   Zirconium  27.02 %  Zr   36.50 % ZrO2
   Silicon    16.64 %  Si   35.60 % SiO2
   Oxygen     33.18 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2ZrSi2O7
Help on Environment: Environment: Aegirine-rich metasomatic rocks.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: Gakman Valley, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Khibinskite + Pronunciation Say KHIBINSKITE
Help on Synonym: Synonym: ICSD 20100
  PDF 26-928

Khibinskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7315:1:1.2702
Help on Cell Dimensions: Cell Dimensions: a = 19.22, b = 11.1, c = 14.1, Z = 16; beta = 116.5° V = 2,692.07 Den(Calc)= 3.33
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: B2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.76(1), 2.95(0.7), 1.63(0.65),

Physical Properties of Khibinskite

Help on Cleavage: Cleavage: {001} Perfect, {100} Perfect, {111} Perfect
Help on Color: Color: White, Light yellow, Colorless.
Help on Density: Density: 3.3 - 3.4, Average = 3.34
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Even - Flat surfaces (not cleavage) fractured in an even pattern.
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Stellate - Occurs as spherical, radial aggregates radiating from a "star" like point.
Help on Hardness: Hardness: 4.5-5.5 - Near Apatite
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white

Optical Properties of Khibinskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2097,KPDmeas= 0.2085,KC= 0.2057
Ncalc = 1.68 - 1.7
Help on Optical Data: Optical Data: Biaxial (-), a=1.665, b=1.715, g=1.715, bire=0.0500, 2V(Calc)=0, 2V(Meas)=6-16.

Calculated Properties of Khibinskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Khibinskite =3.35 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEKhibinskite = 39.22 barns/electron
U=PEKhibinskite x relectron= 126.09 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 320.74 (Gamma Ray American Petroleum Institute Units)
Concentration of Khibinskite per GRapi unit = 0.31 (%)

Estimated Radioactivity from Khibinskite - barely detectable


Khibinskite Classification

Help on  Dana Class: Dana Class: (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions
  (55.02)with cations in [6] coordination
  (55.02.02)Keldyshite group Keldyshite Na2-xHxZrSi2O7•n(H2O) P1 1 Khibinskite K2ZrSi2O7 B2/m 2/m Parakeldyshite Na2ZrSi2O7 P1 1
Help on  Strunz Class: Strunz Class: 09.BC.10 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BC -Si2O7 groups, without non-tetrahedral anions;
09.BC.10 Khibinskite K2ZrSi2O7 B2/m 2/m
09.BC.10 Keldyshite Na2-xHxZrSi2O7•n(H2O) P1 1
09.BC.10 Parakeldyshite Na2ZrSi2O7 P1 1

Other Khibinskite Information

Help on References: References: NAME( Dana8) 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 Khibinskite :
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.BC.10





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