Mikasaite Mineral Data

General Mikasaite Information

Chemical Formula:

Fe+++2(SO4)3

Composition:

Molecular Weight = 399.88 gm

Iron 27.93 % Fe 39.93 % Fe₂O₃

Sulfur 24.06 % S 60.07 % SO₃

Oxygen 48.01 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺₂(SO₄)₃

Environment:

As a sublimation product around a coal-gas escape fracture in a coal-bearing formation.

IMA Status:

Approved IMA 1994

Locality:

Ikushunbetsu, Mikasa City, Hokkaido, Japan. Link to MinDat.org Location Data.

Name Origin:

For its locality.

Name Pronunciation:

Mikasaite + Pronunciation

Synonym:

ICSD 21018

IMA1992-015

PDF 47-1774

Mikasaite Image

Images:

Mikasaite

Comments: Pale yellow to white platy crystalline mikasaite cluster.
Location: Ikushunbetsu, Mikassa, Hokkaido, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mikasaite Crystallography

Axial Ratios:

a:c = 1:2.70147

Cell Dimensions:

a = 8.14, c = 21.99, Z = 6; V = 1,261.84 Den(Calc)= 3.16

Crystal System:

Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 3.56(1), 5.99(0.28), 4.35(0.23),

Physical Properties of Mikasaite

Color:

White, Light brown.

Density:

3.06

Diaphaneity:

Transparent

Fracture:

Unknown - Minerals too small to observe fractures.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Mikasaite

Gladstone-Dale:

CI meas= 0.281 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.303 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1617,KPDmeas= 0.167,KC= 0.2321
Ncalc = 1.71 - 1.73

Optical Data:

Uniaxial (+), w=1.504, e=1.518, bire=0.0140.

Calculated Properties of Mikasaite

Electron Density:

Bulk Density (Electron Density)=3.00 gm/cc
note: Specific Gravity of Mikasaite =3.06 gm/cc.

Fermion Index:

Fermion Index = 0.0079561772
Boson Index = 0.9920438228

Photoelectric:

PE_Mikasaite= 9.78 barns/electron
U=PE_Mikasaite x rElectron Density= 29.32 barns/cc.

Radioactivity:

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

Mikasaite Classification

Dana Class:

28.04.05.02 (28)Anhydrous Acid and Sulfates

(28.04)with miscellaneous formulae

(28.04.05)Dana Group

28.04.05.01 Millosevichite (Al,Fe)2(SO4)3 R 3 3

28.04.05.02 Mikasaite Fe2(SO4)3 R 3 3

Strunz Class:

07.AB.05 07 - SULFATES (SELENATES, TELLURATES)

07.A - Sulfates (selenates, etc.) without Additional Anions, without H2O

07.AB -With medium-sized cations

07.AB.05 Millosevichite (Al,Fe)2(SO4)3 R 3 3

07.AB.05 Mikasaite Fe2(SO4)3 R 3 3

Other Mikasaite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p846,1995) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Mikasaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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

Mikasaite

Fe+++2(SO4)3
Dana No: 28.04.05.02 Strunz No: 07.AB.05
Locality:

Notes:

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