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Orschallite

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Formula:
Ca
 
3
(SO
 
3
)
 
2
(SO
 
4
) · 12H
 
2
O
System:TrigonalHardness:4
This page provides mineralogical data about Orschallite.

Classification of Orschallite

IMA status:Approved 1990
Strunz 8th edition ID:4/K.05-15
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:34.8.7.1

34 : SELENITES, TELLURITES AND SULFITES
8 : Compound Selenites, Tellurites and Sulfites
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Type Occurrence of Orschallite

Type Locality:Hannebacher Ley (Hannebacher Lay), Hannebach, Niederzissen, Eifel, Rhineland-Palatinate, Germany
Year of Discovery:1990

Physical Properties of Orschallite

Hardness (Mohs):4

Crystallography of Orschallite

Crystal System:Trigonal
Cell Parameters:a = 11.35Å, c = 28.32Å
Ratio:a:c = 1 : 2.495
Unit Cell Volume:V 3,159.48 ų (Calculated from Unit Cell)

Optical Data of Orschallite

Type:Uniaxial (+)
RI values: nω = 1.494 nε = 1.496
Maximum Birefringence:δ = 0.002

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Orschallite

Formula:
Ca
 
3
(SO
 
3
)
 
2
(SO
 
4
) · 12H
 
2
O
Essential elements:Ca, H, O, S
All elements listed in formula:Ca, H, O, S

Relationship of Orschallite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JE.05Gravegliaite
Mn
2+
 
SO
 
3
 · 3H
 
2
O
4.JE.10Hannebachite
CaSO
 
3
 · H
 
2
O
4.JE.20Scotlandite
PbSO
 
3

Other Names for Orschallite

Synonyms:
IMA1990-041
Other Languages:
German:Orschallit
Russian:Оршаллит
Spanish:Orschallita

Other Information

Health Warning: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:

- +
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.

Internet Links for Orschallite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    • Localities for Orschallite

    The 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.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    France
     
    • Midi-Pyrénées
      • 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
     
    • Rhineland-Palatinate
      • Eifel
        • 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)
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