Mineralogy Database

Clinoenstatite Mineral Data

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General Clinoenstatite Information

Help on Chemical  Formula: Chemical Formula: Mg2Si2O6
Help on Composition: Composition: Molecular Weight = 200.78 gm
   Magnesium  24.21 %  Mg   40.15 % MgO
   Silicon    27.98 %  Si   59.85 % SiO2
   Oxygen     47.81 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg2Si2O6
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1906
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the monoclinic polymorph of enstatite.
Help on Synonym: Synonym: Clinohypersthene
  ICSD 71835
  PDF 35-610
 

Clinoenstatite Image

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  Clinoenstatite

Comments: Crystalline massive clinoenstatite.
Location: Cape Vogel, Papua New Guinea. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Clinoenstatite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0898:1:0.5863
Help on Cell Dimensions: Cell Dimensions: a = 9.6065, b = 8.8146, c = 5.1688, Z = 4; beta = 108.335° V = 415.46 Den(Calc)= 3.21
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.88(1), 2.98(0.95), 3.17(0.6),
 

Physical Properties of Clinoenstatite

Help on Cleavage: Cleavage: {???} Perfect, {???} Indistinct
Help on Color: Color: Colorless, Green, Greenish yellow, Yellow brown.
Help on Density: Density: 3.2 - 3.6, Average = 3.4
Help on Diaphaneity: Diaphaneity: Transparent to translucent to opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: greenish gray
 

Optical Properties of Clinoenstatite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.059 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.204,KPDmeas= 0.1926,KC= 0.2048
Ncalc = 1.66 - 1.74
Help on Optical Data: Optical Data: Biaxial (+), a=1.651, b=1.654, g=1.66, bire=0.0090
 

Calculated Properties of Clinoenstatite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.20 gm/cc
note: Specific Gravity of Clinoenstatite =3.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEClinoenstatite = 1.61 barns/electron
U=PEClinoenstatite x rElectron Density= 5.15 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Clinoenstatite is Not Radioactive
 

Clinoenstatite Classification

Help on  Dana Class: Dana Class: 65.01.01.01 (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.01)with chains P=2
  (65.01.01)P2/c clinopyroxenes
 
65.01.01.01 Clinoenstatite Mg2Si2O6 P 21/c 2/m
 
65.01.01.02 Clinoferrosilite (Fe,Mg)2Si2O6 P 21/c 2/m
 
65.01.01.03 Kanoite (Mn,Mg)2Si2O6 P 21/c 2/m
 
65.01.01.04 Pigeonite (Mg,Fe,Ca)(Mg,Fe)Si2O6 P 21/c 2/m
Help on  Strunz Class: Strunz Class: 09.DA.10 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.10 Clinoenstatite Mg2Si2O6 P 21/c 2/m
 
09.DA.10 Clinoferrosilite (Fe,Mg)2Si2O6 P 21/c 2/m
 
09.DA.10 Kanoite (Mn,Mg)2Si2O6 P 21/c 2/m
 
09.DA.10 Pigeonite (Mg,Fe,Ca)(Mg,Fe)Si2O6 P 21/c 2/m
 

Other Clinoenstatite 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 Clinoenstatite :
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
15 - WWW-MINCRYST

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Clinoenstatite

Mg2Si2O6
Dana No: 65.01.01.01 Strunz No: 09.DA.10
Locality:

 

Notes:

 

 
   
 


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