Mineralogy Database

Jokokuite Mineral Data

Search Webmineral :

General Jokokuite Information

Help on Chemical  Formula: Chemical Formula: MnSO4•5(H2O)
Help on Composition: Composition: Molecular Weight = 241.08 gm
   Manganese  22.79 %  Mn   29.43 % MnO
   Hydrogen    4.18 %  H    37.36 % H2O
   Sulfur     13.30 %  S    33.21 % SO3
   Oxygen     59.73 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+(SO4)•5(H2O)
Help on Environment: Environment: Efflorescences in oxidized portions of mine workings, apparently deposited from mine waters at 25 deg C.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Jokoku and Inakuraishi mines, Hokkaido, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Jokokuite + Pronunciation Say JOKOKUITE
Help on Synonym: Synonym: ICSD 41202
  PDF 31-836

Jokokuite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: Pale pink stalactic mass of jokokuite.
Location: Jokoku Mine, Haminokuni, Hokkaido, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jokokuite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5914:1:0.5691
Help on Cell Dimensions: Cell Dimensions: a = 6.37, b = 10.77, c = 6.13, Z = 2; alpha = 98.767°, beta = 109.967°, gamma = 77.833° V = 381.88 Den(Calc)= 2.10
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.84(1), 2.72(0.72), 4.98(0.61),

Physical Properties of Jokokuite

Help on Cleavage: Cleavage: None
Help on Color: Color: Light pink.
Help on Density: Density: 2.03
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Jokokuite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2444,KPDmeas= 0.2504,KC= 0.2438
Ncalc = 1.49 - 1.51
Help on Optical Data: Optical Data: Biaxial (-), a=1.498, b=1.51, g=1.517, bire=0.0190, 2V(Calc)=74, 2V(Meas)=70-80.

Calculated Properties of Jokokuite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.12 gm/cc
note: Specific Gravity of Jokokuite =2.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0012905543
Boson Index = 0.9987094457
Help on Photoelectric: Photoelectric: PEJokokuite = 6.44 barns/electron
U=PEJokokuite x rElectron Density= 13.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jokokuite is Not Radioactive

Jokokuite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.06)where A XO4 � x(H2O)
  (29.06.07)Chalchanthite Group (Triclinic: P-1) Chalcanthite CuSO4•5(H2O) P1 1 Siderotil FeSO4•5(H2O) P1 1 Pentahydrite MgSO4•5(H2O) P1 1 Jokokuite MnSO4•5(H2O) P1 1
Help on  Strunz Class: Strunz Class: 07.CB.20 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CB -With only medium-sized cations
07.CB.20 Chalcanthite CuSO4•5(H2O) P1 1
07.CB.20 Jokokuite MnSO4•5(H2O) P1 1
07.CB.20 Pentahydrite MgSO4•5(H2O) P1 1
07.CB.20 Siderotil FeSO4•5(H2O) P1 1

Other Jokokuite Information

Help on References: References: NAME( AntBidBlaNic5) 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 Jokokuite :
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

Search for Jokokuite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Jokokuite :

Ask about Jokokuite 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 Espaol

Print or Cut-and-Paste your Jokokuite Specimen Label here :


Dana No: Strunz No: 07.CB.20





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.