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Okhotskite-(Mn++) Mineral Data

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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.
Help on Name Pronunciation: Name Pronunciation: Okhotskite-(Mn++) + Pronunciation Say OKHOTSKITE-(MN++)
 

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 - Prismatic H-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 Diaphaneity: Diaphaneity: 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 Gladstone-Dale: Gladstone-Dale: CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2374,KC= 0.2377
Ncalc = 1.81
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: Bulk Density (Electron Density)=3.36 gm/cc
note: Specific Gravity of Okhotskite-(Mn++) =3.41 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEOkhotskite-(Mn++) = 8.44 barns/electron
U=PEOkhotskite-(Mn++) x rElectron Density= 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: 58.02.02.04 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
  (58.02)with cations in [6] and higher coordination; single and double groups (n=1,2)
  (58.02.02)Pumpellyite group
 
58.02.02.01 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2•(H2O) C 2/m 2/m
 
58.02.02.02 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2•(H2O) A2/m 2/m
 
58.02.02.03 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2•(H2O) Mono
 
58.02.02.04 Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m
 
58.02.02.05 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
58.02.02.06 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2•(H2O) A2/m 2/m
 
58.02.02.07 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
58.02.02.08 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2•(H2O) A2/m 2/m
 
58.02.02.09 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
58.02.02.10 Poppiite! Ca2(V,Fe,Mg)(V,Al)2(Si,Al)3(O,OH)14 C 2/m 2/m
 
58.02.02.11 Pumpellyite-(Al)! Ca2(Al,Fe,Mg)Al2(SiO4)(Si2O7)(OH,O)2•H2O A2/m 2/m
Help on  Strunz Class: Strunz Class: 09.BG.20 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;
 
09.BG.20 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2•(H2O) C 2/m 2/m
 
09.BG.20 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2•(H2O) A2/m 2/m
 
09.BG.20 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
09.BG.20 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2•(H2O) Mono
 
09.BG.20 Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m
 
09.BG.20 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2•(H2O) A2/m 2/m
 
09.BG.20 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
09.BG.20 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2•(H2O) A2/m 2/m
 
09.BG.20 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
09.BG.20 Pumpellyite-(Al)! Ca2(Al,Fe,Mg)Al2(SiO4)(Si2O7)(OH,O)2•H2O A2/m 2/m
 
09.BG.20 Poppiite! Ca2(V,Fe,Mg)(V,Al)2(Si,Al)3(O,OH)14 C 2/m 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 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Okhotskite-(Mn++)

Ca2(Mn++,Mg)(Mn+++,Al,Fe+++)Si3O10(OH)4
Dana No: 58.02.02.04 Strunz No: 09.BG.20
Locality:

 

Notes:

 

 
   
 


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