Okhotskite-(Mn++) Mineral Data + Say OKHOTSKITE-(MN++)


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General Okhotskite-(Mn++) Information

Help on Chemical  Formula: Chemical Formula: Ca2(Mn++,Mg)(Mn+++,Al,Fe+++)Si3O10(OH)4
Help on Composition: Composition: Molecular Weight = 530.54 gm
   Calcium    14.35 %  Ca   20.08 % CaO
   Magnesium   1.37 %  Mg    2.28 % MgO
   Manganese  18.64 %  Mn    9.36 % MnO / 16.37 % Mn2O3
   Aluminum    2.54 %  Al    4.80 % Al2O3
   Iron        4.21 %  Fe    6.02 % Fe2O3
   Silicon    15.88 %  Si   33.98 % SiO2
   Hydrogen    0.78 %  H     6.96 % H2O
   Oxygen     42.22 %  O
             ______        ______ 
             100.00 %       99.85 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.9Mn2+0.7Mg0.3Mn3+1.1Al0.5Fe3+0.4Si3O9.9(OH)4.1
Help on Environment: Environment: In network veinlets cutting hematite-rich ores.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: From the Kokuriki mine, at Hiyoshi, about 20 km north of Kitami City, Hikkaido, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1987 by Togari and Akasaka for the Sea of Okhotsk, along which the mine is located.
 

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Okhotskite-(Mn++) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4811:1:3.255
Help on Cell Dimensions: Cell Dimensions: a = 8.887, b = 6, c = 19.53, Z = 4; beta = 97.08° V = 1,033.44 Den(Calc)= 3.41
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.961(1), 2.72(0.7), 3.87(0.7),
 

Physical Properties of Okhotskite-(Mn++)

Help on Cleavage: Cleavage: [???] Distinct
Help on Color: Color: Orange.
Help on Diaphaniety: Diaphaniety: Transparent
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: pale orange
 

Optical Properties of Okhotskite-(Mn++)

Help on Optical Data: Optical Data: Biaxial (-), a=1.782, b=1.82, g=1.827, bire=0.0450
 

Calculated Properties of Okhotskite-(Mn++)

Help on Electron Density: Electron Density:

relectron=3.36 gm/cc
note: rOkhotskite-(Mn++) =3.41 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01008
Boson Index = 0.98992
Help on Photoelectric: Photoelectric:

PEOkhotskite-(Mn++) = 8.44 barns/electron
U=PEOkhotskite-(Mn++) x relectron= 28.38 barns/cc.

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

Okhotskite-(Mn++) is Not Radioactive

 

Okhotskite-(Mn++) Classification

Help on  Dana Class: Dana Class: 58.2.2.4 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
  (58.2)with cations in [6] and higher coordination; single and double groups (n=1,2)
  (58.2.2)Pumpellyite group
 
58.2.2.1 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2·(H2O) C 2/m 2/m
 
58.2.2.2 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2·(H2O) A2/m 2/m
 
58.2.2.3 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2·(H2O) Mono
 
58.2.2.4 Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m
 
58.2.2.5 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
 
58.2.2.6 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2·(H2O) A2/m 2/m
 
58.2.2.7 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
 
58.2.2.8 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2·(H2O) A2/m 2/m
 
58.2.2.9 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/C.24-80* VIII - Silicates
  VIII/C - Sorosilicates, mixed structure with [SiO4]2- "inseln" and [Si2O7]6- groups
  VIII/C.24 - Pumpellyite group
 
VIII/C.24-10 Macfallite Ca2(Mn,Al)3(SiO4)(Si2O7)(OH)3 P 21/m 2/m
 
VIII/C.24-20 Sursassite Mn2Al3(SiO4)(Si2O7)(OH)3 P 21/m 2/m
 
VIII/C.24-30 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
 
VIII/C.24-40 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
 
VIII/C.24-42 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2·(H2O) A2/m 2/m
 
VIII/C.24-50 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2·(H2O) A2/m 2/m
 
VIII/C.24-60 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2·(H2O) C 2/m 2/m
 
VIII/C.24-61 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2·(H2O) A2/m 2/m
 
VIII/C.24-70 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
 
VIII/C.24-80 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2·(H2O) Mono
 
VIII/C.24-80* Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m
 
VIII/C.24-90 Samfowlerite Ca14Mn3Zn2(Be,Zn)2Be6(SiO4)6(Si2O7)4(OH,F)6 P 21/c 2/m
 

Other Okhotskite-(Mn++) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Okhotskite-(Mn++) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Print or Cut-and-Paste your Okhotskite-(Mn++) Specimen Label here :

Okhotskite-(Mn++)

Ca2(Mn++,Mg)(Mn+++,Al,Fe+++)Si3O10(OH)4
Dana No: 58.2.2.4 Strunz No: VIII/C.24-80*
Locality:

 

Notes:

 

 
   
 
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