Okhotskite-(Mn++) Mineral Data

Okhotskite-(Mn++) Mineral Data +

[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974

General Okhotskite-(Mn++) Information

Chemical Formula:

Ca2(Mn++,Mg)(Mn+++,Al,Fe+++)Si3O10(OH)4

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

Empirical Formula:

Ca_1.9Mn²⁺_0.7Mg_0.3Mn³⁺_1.1Al_0.5Fe³⁺_0.4Si₃O_9.9(OH)_4.1

Environment:

In network veinlets cutting hematite-rich ores.

IMA Status:

Approved IMA 1987

Locality:

From the Kokuriki mine, at Hiyoshi, about 20 km north of Kitami City, Hikkaido, Japan. Link to MinDat.org Location Data.

Name Origin:

Named in 1987 by Togari and Akasaka for the Sea of Okhotsk, along which the mine is located.

Search for Okhotskite-(Mn ) Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Okhotskite-(Mn++) Crystallography

Axial Ratios:

a:b:c =1.4811:1:3.255

Cell Dimensions:

a = 8.887, b = 6, c = 19.53, Z = 4; beta = 97.08° V = 1,033.44 Den(Calc)= 3.41

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/m

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

By Intensity(I/I_o): 2.961(1), 2.72(0.7), 3.87(0.7),

Physical Properties of Okhotskite-(Mn++)

Cleavage:

[???] Distinct

Color:

Orange.

Diaphaniety:

Transparent

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

pale orange

Optical Properties of Okhotskite-(Mn++)

Optical Data:

Biaxial (-), a=1.782, b=1.82, g=1.827, bire=0.0450

Calculated Properties of Okhotskite-(Mn++)

Electron Density:

r_electron=3.36 gm/cc
note: r_{Okhotskite-(Mn++)}=3.41 gm/cc.

Fermion Index

Fermion Index = 0.01008
Boson Index = 0.98992

Photoelectric:

PE_{Okhotskite-(Mn++)}= 8.44 barns/electron
U=PE_{Okhotskite-(Mn++)} x r_electron= 28.38 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Okhotskite-(Mn++) is Not Radioactive

Okhotskite-(Mn++) Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)

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

Search for Okhotskite-(Mn++) using:

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

Visit our Advertisers for Okhotskite-(Mn++) :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Okhotskite-(Mn++) Mineral Data :

Ask about Okhotskite-(Mn++) 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 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: