Mineralogy Database

Kosmochlor Mineral Data

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General Kosmochlor Information

Help on Chemical  Formula: Chemical Formula: NaCr+++Si2O6
Help on Composition: Composition: Molecular Weight = 227.15 gm
   Sodium    10.12 %  Na   13.64 % Na2O
   Chromium  22.89 %  Cr   33.46 % Cr2O3
   Silicon   24.73 %  Si   52.90 % SiO2
   Oxygen    42.26 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCrSi2O6
Help on Environment: Environment: A major constituent of some jadeitites; an accessory constituent of some iron meteorites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1894
Help on Locality: Locality: In the Toluca, Coahuila, Hex River Mountains, and Canyon Diablo meteorites. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the German kosmisch, for cosmic, in allusion to its meteoritic occurrence, and the Greek chlor, for green.
Help on Name Pronunciation: Name Pronunciation: Kosmochlor + Pronunciation Say KOSMOCHLOR
Help on Synonym: Synonym: Cosmochlore
  ICSD 9670
  PDF 26-1484

Kosmochlor Image

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Comments: Green resinous massive kosmochlor, variety ureyite, in serpentinite.
Location: Myanmar. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kosmochlor Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0989:1:0.6043
Help on Cell Dimensions: Cell Dimensions: a = 9.574, b = 8.712, c = 5.265, Z = 4; beta = 107.49° V = 418.84 Den(Calc)= 3.60
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): 2.958(1), 2.87(0.65), 2.511(0.4),

Physical Properties of Kosmochlor

Help on Cleavage: Cleavage: {110} Good
Help on Color: Color: Emerald green.
Help on Density: Density: 3.6
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light green

Optical Properties of Kosmochlor

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.078 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.078 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2149,KPDmeas= 0.2149,KC= 0.233
Ncalc = 1.84
Help on Optical Data: Optical Data: Biaxial (?), a=1.766, g=1.781, bire=0.0150

Calculated Properties of Kosmochlor

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Kosmochlor =3.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEKosmochlor = 6.21 barns/electron
U=PEKosmochlor x rElectron Density= 21.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kosmochlor is Not Radioactive

Kosmochlor Classification

Help on  Dana Class: Dana Class: 65.01.03c.04 (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.01)with chains P=2
  (65.01.03c)C2/c clinopyroxenes (Na clinopyroxenes)
65.01.03c.01 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m
65.01.03c.02 Aegirine NaFeSi2O6 C 2/c 2/m
65.01.03c.03 Namansilite NaMn(Si2O6) C 2/c 2/m
65.01.03c.04 Kosmochlor NaCrSi2O6 C 2/c 2/m
65.01.03c.05 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m
65.01.03c.06 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.DA.25 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DA -Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
09.DA.25 Aegirine NaFeSi2O6 C 2/c 2/m
09.DA.25 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m
09.DA.25 Kosmochlor NaCrSi2O6 C 2/c 2/m
09.DA.25 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m
09.DA.25 Namansilite NaMn(Si2O6) C 2/c 2/m
09.DA.25 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m

Other Kosmochlor 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 Kosmochlor :
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: 65.01.03c.04 Strunz No: 09.DA.25





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