Orschallite
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About Orschallite
Formula:
Ca3(SO3)2(SO4) · 12H2O
Hardness:
4
Specific Gravity:
1.90
Crystal System:
Trigonal
Name:
In honour of P. Orschall, Cologne, Germany, who discovered the mineral.
This page provides mineralogical data about Orschallite.
Classification of Orschallite
Approved
Approval Year:
1990
4/K.05-15
4.JE.15
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
E : Sulfites
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
E : Sulfites
34.8.7.1
34 : SELENITES, TELLURITES AND SULFITES
8 : Compound Selenites, Tellurites and Sulfites
34 : SELENITES, TELLURITES AND SULFITES
8 : Compound Selenites, Tellurites and Sulfites
Physical Properties of Orschallite
Hardness:
4 on Mohs scale
Density:
1.90(3) g/cm3 (Measured) 1.87 g/cm3 (Calculated)
Optical Data of Orschallite
Type:
Uniaxial (+)
RI values:
nω = 1.494 nε = 1.496
Max Birefringence:
δ = 0.002

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:
Moderate
Chemical Properties of Orschallite
Formula:
Ca3(SO3)2(SO4) · 12H2O
IMA Formula:
Ca3(S4+O3)2(SO4) · 12H2O
Elements listed:
Crystallography of Orschallite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3c
Setting:
R3c
Cell Parameters:
a = 11.35 Å, c = 28.32 Å
Ratio:
a:c = 1 : 2.495
Unit Cell V:
3,159.48 ų (Calculated from Unit Cell)
Z:
6
Type Occurrence of Orschallite
Place of Conservation of Type Material:
University of Vienna, Austria
Geological Setting of Type Material:
Submarine pillow basalts.
Associated Minerals at Type Locality:
Synonyms of Orschallite
Other Language Names for Orschallite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Nickel-Strunz Grouping
4.JE.X | Albertiniite | Fe2+(SO3)·3H2O | Mon. 2/m |
4.JE.05 | Gravegliaite | Mn2+SO3 · 3H2O | Orth. |
4.JE.10 | Hannebachite | CaSO3 · H2O | Orth. mmm (2/m 2/m 2/m) |
4.JE.20 | Scotlandite | PbSO3 | Mon. 2/m |
Other Information
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 Orschallite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Weidenthaler, C., Tillmanns, E., Hentschel, G. (1993): Orschallite, Ca3(SO3)2SO4.12H2O, a new calcium-sulfite-sulfate-hydrate mineral. Mineralogy and Petrology, 48, 167-177.
Frost, R. L. and Keeffe, E. C. (2009): Raman spectroscopic study of the sulphite bearing minerals scotlandite, hannebachite and orschallite – implications for the desulphation of soils. Journal of Raman Spectroscopy, 40, 244-248.
Internet Links for Orschallite
mindat.org URL:
https://www.mindat.org/min-3022.html
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Localities for Orschallite
Locality List




All localities listed without proper references should be considered as questionable.
Canada | |
| Reiner Mielke 2015 |
Reiner Mielke 2016 | |
France | |
| Eytier J.R. & Ch., Favreau G., Devouard B., Vigier J. (2004), Minéraux de pyrométamorphisme de Lapanouse-de Sévérac (Aveyron), Cahier des Micromonteurs, n°85, pp: 3-58 |
Germany (TL) | |
| Weidenthaler, C., Tillmanns, E., Hentschel, G. (1993): Orschallite, Ca3(SO3)2SO4*12H2O, a new calcium-sulfite-sulfate-hydrate mineral. Mineralogy and Petrology, 48, 167-177 ; NM 90-94 (1997) |
USA | |
| Kasatkin, A.V., Plášil, J., Marty, J., Belakovskiy, D.I., Lykova, I.S. (2014): Nestolaite, CaSeO3·H2O, a new mineral from the Little Eva mine, Grand County, Utah, USA. Mineralogical Magazine, 78, 497-505. |
Shaft #8, Nipissing 404, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada