Glaucochroite Mineral Data + Say GLAUCOCHROITE

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General Glaucochroite Information

Help on Chemical  Formula: Chemical Formula: CaMnSiO4
Help on Composition: Composition: Molecular Weight = 187.10 gm
   Calcium    21.42 %  Ca   29.97 % CaO
   Manganese  29.36 %  Mn   37.91 % MnO
   Silicon    15.01 %  Si   32.11 % SiO2
   Oxygen     34.21 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMn2+SiO4
Help on Environment: Environment: Metamorphosed limestone containing manganese minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1899
Help on Locality: Locality: Franklin Furnace, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 100650
  PDF 14-376
 

Glaucochroite Image

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Glaucochroite   Zincite   Willemite

Comments: Pinkish gray crystalline glaucochroite intermixed with pale green willemite, with dark red zincite and white calcite.
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glaucochroite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4416:1:0.5834
Help on Cell Dimensions: Cell Dimensions: a = 4.92, b = 11.14, c = 6.5, Z = 4; V = 356.26 Den(Calc)= 3.49
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.85(1), 2.63(0.8), 2.69(0.8),
Click Here for Large Glaucochroite Structure Window Crystal Structure:

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Lager G A , Meagher E P , American Mineralogist , 63 (1978) p.365-377, High-temperature structural study of six olivines, T = 25 deg C

View Additional jPOWD Structure files for Glaucochroite
[1] [2] [3]
 

Physical Properties of Glaucochroite

Help on Cleavage: Cleavage: [001] Indistinct
Help on Color: Color: Green, White, Pinkish.
Help on Density: Density: 3.4
Help on Diaphaniety: Diaphaniety: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Glaucochroite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.024 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2039,KPDmeas= 0.2093,KC= 0.2044
Help on Optical Data: Optical Data: Biaxial (-), a=1.679-1.686, b=1.716-1.723, g=1.729-1.736, bire=0.0500, 2V(Calc)=60, 2V(Meas)=61. Dispersion medium, r > v.
 

Calculated Properties of Glaucochroite

Help on Electron Density: Electron Density:

relectron=3.39 gm/cc
note: rGlaucochroite =3.49 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00746
Boson Index = 0.99254
Help on Photoelectric: Photoelectric:

PEGlaucochroite = 10.73 barns/electron
U=PEGlaucochroite x relectron= 36.42 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Glaucochroite is Not Radioactive

 

Glaucochroite Classification

Help on  Dana Class: Dana Class: 51.3.2.3 (51)Nesosilicate Insular SiO4 Groups Only
  (51.3)with all cations in octahedral [6] coordination
  (51.3.2)Monticellite - Kirschsteinite series
 
51.3.2.1 Monticellite CaMgSiO4 P nma 2/m 2/m 2/m
 
51.3.2.2 Kirschsteinite CaFeSiO4 Pbmn 2/m 2/m 2/m
 
51.3.2.3 Glaucochroite CaMnSiO4 Pbnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/A.05-30 VIII - Silicates
  VIII/A - Nesosilicates with [SiO4]4-groups, cations of octahedral orientation [6]
  VIII/A.05 - Monticellite - Glaucochroite series
 
VIII/A.05-10 Monticellite CaMgSiO4 P nma 2/m 2/m 2/m
 
VIII/A.05-20 Kirschsteinite CaFeSiO4 Pbmn 2/m 2/m 2/m
 
VIII/A.05-30 Glaucochroite CaMnSiO4 Pbnm 2/m 2/m 2/m
 

Other Glaucochroite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Glaucochroite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 - Franklin Minerals(Dunn) 5 - Franklin Minerals(Palache) 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (MinSocAm) 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 - WWW-MINCRYST 16 -École des Mines de Paris

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Glaucochroite

CaMnSiO4
Dana No: 51.3.2.3 Strunz No: VIII/A.05-30
Locality:

 

Notes:

 

 
   
 
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