Jokokuite Mineral Data

General Jokokuite Information

Chemical Formula:

MnSO4•5(H2O)

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

Empirical Formula:

Mn²⁺(SO₄)•5(H₂O)

Environment:

Efflorescences in oxidized portions of mine workings, apparently deposited from mine waters at 25 deg C.

IMA Status:

Approved IMA 1978

Locality:

Jokoku and Inakuraishi mines, Hokkaido, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Jokokuite + Pronunciation

Synonym:

ICSD 41202

PDF 31-836

Jokokuite Image

Images:

Jokokuite

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

Axial Ratios:

a:b:c =0.5914:1:0.5691

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

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 5.84(1), 2.72(0.72), 4.98(0.61),

Physical Properties of Jokokuite

Cleavage:

None

Color:

Light pink.

Density:

2.03

Diaphaneity:

Transparent to Translucent

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Jokokuite

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

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

Electron Density:

Bulk Density (Electron Density)=2.12 gm/cc
note: Specific Gravity of Jokokuite =2.08 gm/cc.

Fermion Index:

Fermion Index = 0.0012905543
Boson Index = 0.9987094457

Photoelectric:

PE_Jokokuite= 6.44 barns/electron
U=PE_Jokokuite x rElectron Density= 13.67 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jokokuite is Not Radioactive

Jokokuite Classification

Dana Class:

29.06.07.04 (29)Hydrated Acid and Sulfates

(29.06)where A XO4 ï¿½ x(H2O)

(29.06.07)Chalchanthite Group (Triclinic: P-1)

29.06.07.01 Chalcanthite CuSO4•5(H2O) P1 1

29.06.07.02 Siderotil FeSO4•5(H2O) P1 1

29.06.07.03 Pentahydrite MgSO4•5(H2O) P1 1

29.06.07.04 Jokokuite MnSO4•5(H2O) P1 1

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

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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
15 - WWW-MINCRYST

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

Jokokuite

MnSO4•5(H2O)
Dana No: 29.06.07.04 Strunz No: 07.CB.20
Locality:

Notes:

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