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About OrschalliteHide

Ca3(SO3)2(SO4) · 12H2O
Specific Gravity:
Crystal System:
In honour of P. Orschall, Cologne, Germany, who discovered the mineral.
This page provides mineralogical data about Orschallite.

Classification of OrschalliteHide

Approval Year:

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
E : Sulfites

8 : Compound Selenites, Tellurites and Sulfites

Physical Properties of OrschalliteHide

1.90(3) g/cm3 (Measured)    1.87 g/cm3 (Calculated)

Optical Data of OrschalliteHide

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.
Surface Relief:

Chemical Properties of OrschalliteHide

Ca3(SO3)2(SO4) · 12H2O
IMA Formula:
Ca3(S4+O3)2(SO4) · 12H2O

Crystallography of OrschalliteHide

Crystal System:
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
Cell Parameters:
a = 11.35 Å, c = 28.32 Å
a:c = 1 : 2.495
Unit Cell V:
3,159.48 ų (Calculated from Unit Cell)

Type Occurrence of OrschalliteHide

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 OrschalliteHide

Other Language Names for OrschalliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
6 photos of Orschallite associated with DolomiteCaMg(CO3)2
6 photos of Orschallite associated with PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
1 photo of Orschallite associated with BismuthBi

Related Minerals - Nickel-Strunz GroupingHide

4.JE.XAlbertiniiteFe2+(SO3)·3H2OMon. 2/m
4.JE.05GravegliaiteMn2+SO3 · 3H2OOrth.
4.JE.10HannebachiteCaSO3 · H2OOrth. mmm (2/m 2/m 2/m)
4.JE.20ScotlanditePbSO3Mon. 2/m

Other InformationHide

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 OrschalliteHide

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 OrschalliteHide

Localities for OrschalliteHide

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.
  • Ontario
    • Timiskaming District
      • Cobalt-Gowganda region
        • Cobalt area
          • Coleman Township
Reiner Mielke 2015
Reiner Mielke 2016
  • Occitanie
    • Aveyron
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)
  • Rhineland-Palatinate
    • Ahrweiler
      • Brohltal
        • Niederzissen
          • Hannebach
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)
  • Utah
    • Grand Co.
      • Thompsons Mining District
        • Yellow Cat Mesa
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. ; Kasatkin, A. V., Plasil, J., Pekov, I. V., Belakovskiy, D. I., Nestola, F., Cejka, J., ... & Thorne, B. (2015). Karpenkoite, Co3 (V2O7)(OH) 2· 2H2O, a cobalt analogue of martyite from the Little Eva mine, Grand County, Utah, USA. Journal of Geosciences, 60(4), 251-257.
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