Kosmochlor Mineral Data

[Thumbnails] [Miniatures] [Cabinets] [About Us] [FAQ]
Welcome To Mason's Minerals
Your Source for Beautiful Minerals and Crystals
We offer a no-questioned-asked Satisfaction Guarantee

General Kosmochlor Information

Chemical Formula:

NaCr+++Si2O6

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

Empirical Formula:

NaCrSi₂O₆

Environment:

A major constituent of some jadeitites; an accessory constituent of some iron meteorites.

IMA Status:

Valid Species (Pre-IMA) 1894

Locality:

In the Toluca, Coahuila, Hex River Mountains, and Canyon Diablo meteorites. Link to MinDat.org Location Data.

Name Origin:

From the German kosmisch, for cosmic, in allusion to its meteoritic occurrence, and the Greek chlor, for green.

Name Pronunciation:

Kosmochlor + Pronunciation

Synonym:

Cosmochlore

ICSD 9670

PDF 26-1484

Ureyite

Kosmochlor Image

Images:

Kosmochlor

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

Kosmochlor Crystallography

Axial Ratios:

a:b:c =1.0989:1:0.6043

Cell Dimensions:

a = 9.574, b = 8.712, c = 5.265, Z = 4; beta = 107.49° V = 418.84 Den(Calc)= 3.60

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.958(1), 2.87(0.65), 2.511(0.4),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Cameron M , Sueno S , Prewitt C T , Papike J J , American Mineralogist , 58 (1973) p.594-618, High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite,, spodumene, and ureyite, T = 24 C, pyroxene

View Additional jPOWD Structure files for Kosmochlor
[1] [10] [11] [12] [13] [14] [15] [2] [3] [4] [5] [6] [7] [8] [9]

Physical Properties of Kosmochlor

Cleavage:

{110} Good

Color:

Emerald green.

Density:

3.6

Diaphaneity:

Transparent to Translucent

Hardness:

6-7 - Orthoclase-Quartz

Luster:

Vitreous (Glassy)

Streak:

light green

Optical Properties of Kosmochlor

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

Optical Data:

Biaxial (?), a=1.766, g=1.781, bire=0.0150

Calculated Properties of Kosmochlor

Electron Density:

Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Kosmochlor =3.60 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Kosmochlor= 6.21 barns/electron
U=PE_Kosmochlor x rElectron Density= 21.83 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kosmochlor is Not Radioactive

Kosmochlor Classification

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

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

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Kosmochlor using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Kosmochlor :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Kosmochlor Mineral Data :

Ask about Kosmochlor here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Kosmochlor Specimen Label here :

Kosmochlor

NaCr+++Si2O6
Dana No: 65.01.03c.04 Strunz No: 09.DA.25
Locality:

Notes: