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Mikasaite

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Formula:
Fe2(SO4)3
Colour:
White to light brown
Lustre:
Dull
Hardness:
2
Specific Gravity:
3.06 (Calculated)
Crystal System:
Trigonal
Name:
From the type locality.
A sublimation formed from coal-gas escape; gas temperature was 307°C (Mineral. Rec. 27, 203).

A monoclinic dimorph is known as a synthetic phase.


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Classification of MikasaiteHide

Approved
7.AB.05

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

Physical Properties of MikasaiteHide

Comment:
Semitransparent
Colour:
White to light brown
Streak:
White to light brown
Hardness:
Density:
3.06 g/cm3 (Calculated)

Optical Data of MikasaiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.504() 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.
Surface Relief:
Low

Chemical Properties of MikasaiteHide

Formula:
Fe2(SO4)3
IMA Formula:
Fe3+2(SO4)3
Common Impurities:
Mn

Crystallography of MikasaiteHide

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

Type Occurrence of MikasaiteHide

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.

Synonyms of MikasaiteHide

Other Language Names for MikasaiteHide

German:Mikasait
Spanish:Mikasaita

Related Minerals - Nickel-Strunz GroupingHide

7.AB.DravertiteCuMg(SO4)2Mon. 2/m
7.AB.05Millosevichite(Al,Fe)2(SO4)3Tric.
7.AB.10ChalcocyaniteCuSO4Orth. mmm (2/m 2/m 2/m)
7.AB.10ZinkositeZnSO4Orth.
7.AB.10FerrotelluriteFe(TeO4) (?)

Related Minerals - Dana Grouping (8th Ed.)Hide

28.4.5.1Millosevichite(Al,Fe)2(SO4)3Tric.

Other InformationHide

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.

References for MikasaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hirama, T. (1994). Mikasaite,(Fe 3+,A1)2(SO4)3, sulphate mineral from Mikasa city, Hokkaido, Japan. Mineralogical Magazine, 58, 649-653.
New Minerals (1997), New Minerals 1990-1994.

Internet Links for MikasaiteHide

Localities for MikasaiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany
 
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
Hungary
 
  • Baranya Co.
    • Mecsek Mts
      • Pécs
Geoda 2012/I.
Japan (TL)
 
  • Hokkaido
    • Sorachi Province
      • Mikasa City
[Mineralogical Magazine(1994) 58, 649-653; MinRec 27:203]
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Kłodzko District
      • Nowa Ruda (Neurode)
        • Słupiec Mine (John Mine)
Ciesielczukk, J., Kruszewski, Ł., Fabiańska, M.J., Misz-Kennan, M., Kowalski, A., Mysza, B., 2014: Efflorescences and gas composition emitted from the burning coal-waste dump in Słupiec, Lower Silesian Coal Basin, Poland. Proceedings of the International Symposium CEMC 2014, Skalský Dvůr, April 23-26th, 26-27
  • Upper Silesia (Śląskie)
    • Upper Silesian Coal Basin
      • Rybnik Coal Area
        • Radlin
Łukasz Kruszewski (2012) Unique chloride assemblage of exhalative origin from burning coal-mining dump in Radlin (Rybnik Coal Area, S Poland). Mineralogical Society of Poland Special Papers 40
Russia
 
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
Mineral and/or Locality  
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