Mikasaite
A valid IMA mineral species
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About Mikasaite
Formula:
Fe2(SO4)3
Colour:
White to light brown
Lustre:
Dull
Hardness:
2
Specific Gravity:
3.06 (Calculated)
Crystal System:
Trigonal
Name:
Named for Mikasa City, Japan near the type locality.
A sublimation formed from coal-gas escape; gas temperature was 307°C (Mineral. Rec. 27, 203). The Fe analogue of millosevichite.
A monoclinic dimorph is known as a synthetic phase.
A monoclinic dimorph is known as a synthetic phase.
Unique Identifiers
Mindat ID:
2709
Long-form identifier:
mindat:1:1:2709:6
GUID
(UUID V4):
(UUID V4):
993d888b-f4b5-403d-8091-af7d9919f94e
Classification of Mikasaite
Approved
First published:
1994
Type description reference:
7.AB.05
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
B : With medium-sized cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
B : With medium-sized cations
28.4.5.2
28 : ANHYDROUS ACID AND NORMAL SULFATES
4 : Miscellaneous
28 : ANHYDROUS ACID AND NORMAL SULFATES
4 : Miscellaneous
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Mik | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Mikasaite
Dull
Comment:
Semitransparent
Colour:
White to light brown
Streak:
White to light brown
Hardness:
2 on Mohs scale
Density:
3.06 g/cm3 (Calculated)
Optical Data of Mikasaite
Type:
Uniaxial (+)
RI values:
nω = 1.504(2) nε = 1.518(3)
Max Birefringence:
δ = 0.014
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Chemical Properties of Mikasaite
Formula:
Fe2(SO4)3
IMA Formula:
Fe3+2(SO4)3
Elements listed:
Common Impurities:
Mn
Crystallography of Mikasaite
Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 8.14(1) Å, c = 21.99(8) Å
Ratio:
a:c = 1 : 2.701
Unit Cell V:
1,261.84 ų (Calculated from Unit Cell)
Z:
6
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0010786 | Mikasaite | Christidis P C, Rentzeperis P J (1976) The crystal structure of rhombohedral Fe2(SO4)3 Zeitschrift fur Kristallographie 144 341-352 | 1976 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.56 Å | (100) |
5.99 Å | (28) |
4.35 Å | (23) |
2.97 Å | (20) |
2.72 Å | (20) |
2.64 Å | (11) |
2.35 Å | (7) |
Comments:
Ikushunbetsu, Japan. Data from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 10b: Anthropogenic minerals | <10 Ka |
54 : Coal and other mine fire minerals (see also #51 and #56) |
Type Occurrence of Mikasaite
General Appearance of Type Material:
Aggregates of porous spherical crystals.
Place of Conservation of Type Material:
Department of Geology and Mineralogy, Faculty of Science, Hokkaido University, Sapporo, Japan.
Geological Setting of Type Material:
From fracture near burning coal seam.
Reference:
Miura, H., Niida, K., Hirama, T. (1994) Mikasaite, (Fe3+,Al)2(SO4)3, a new ferric sulphate mineral from Mikasa city, Hokkaido, Japan. Mineralogical Magazine: 58: 649-653.
Synonyms of Mikasaite
Other Language Names for Mikasaite
Related Minerals - Strunz-mindat Grouping
7.AB. | Dravertite | CuMg(SO4)2 |
7.AB. | Dagenaisite | Zn3Te6+O6 |
7.AB. | Andymcdonaldite | Fe2TeO6 |
7.AB.05 | Millosevichite | Al2(SO4)3 |
7.AB.05 | Koryakite | NaKMg2Al2(SO4)6 |
7.AB.10 | Chalcocyanite | CuSO4 |
7.AB.10 | Zinkosite | ZnSO4 |
7.AB.15 | Hermannjahnite | CuZn(SO4)2 |
7.AB.25 | Ottoite | Pb2TeO5 |
7.AB.55 | Mcalpineite | Cu3(Te6+O6) |
Other Information
Notes:
Deliquescent, dissolving in adsorbed water.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Mikasaite
mindat.org URL:
https://www.mindat.org/min-2709.html
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Please feel free to link to this page.
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References for Mikasaite
Reference List:
Localities for Mikasaite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Germany | |
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Hungary | |
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Japan (TL) | |
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Lebanon | |
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Poland | |
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Russia | |
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Ikushunbetsu, Mikasa City, Sorachi Subprefecture, Hokkaidō Prefecture, Japan