Orschallite Mineral Data

General Orschallite Information

Chemical Formula:

Ca3(SO3)2SO4•12(H2O)

Composition:

Molecular Weight = 592.61 gm

Calcium 20.29 % Ca 28.39 % CaO

Hydrogen 4.08 % H 36.48 % H₂O

Sulfur 16.23 % S 21.62 % SO₂ / 13.51 % SO₃

Oxygen 59.40 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₃(SO₃)₂(SO₄)•12(H₂O)

IMA Status:

Approved IMA 1993

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named for P. Orschall, Cologne, Germany, who discovered the mineral.

Name Pronunciation:

Orschallite + Pronunciation

Synonym:

ICSD 73997

IMA1990-041

PDF 45-1484

Orschallite Crystallography

Axial Ratios:

a:c = 1:2.49524

Cell Dimensions:

a = 11.35, c = 28.321, Z = 6; V = 3,159.59 Den(Calc)= 1.87

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.73(1), 2.69(0.8), 8.11(0.8),

Physical Properties of Orschallite

Cleavage:

None

Color:

Colorless.

Density:

1.9

Diaphaneity:

Transparent

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Orschallite

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2647,KPDmeas= 0.2606,KC= 0.2642
Ncalc = 1.49 - 1.5

Optical Data:

Uniaxial (+), w=1.4941, e=1.496, bire=0.0019.

Calculated Properties of Orschallite

Electron Density:

Bulk Density (Electron Density)=1.94 gm/cc
note: Specific Gravity of Orschallite =1.87 gm/cc.

Fermion Index:

Fermion Index = 0.0017825961
Boson Index = 0.9982174039

Photoelectric:

PE_Orschallite= 3.45 barns/electron
U=PE_Orschallite x rElectron Density= 6.70 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Orschallite is Not Radioactive

Orschallite Classification

Dana Class:

34.08.07.01 (34)Selenites - Tellurites - Sulfites

(34.08)Dana Type

(34.08.07)Dana Group

34.08.07.01 Orschallite Ca3(SO3)2SO4•12(H2O) R 3c 3 2/m

Strunz Class:

04.JE.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JE -Sulfites

04.JE.15 Orschallite Ca3(SO3)2SO4•12(H2O) R 3c 3 2/m

Other Orschallite Information

References:

PHYS. PROP.(Am.Min.,Vol.79,p572,1994) OPTIC PROP.(Am.Min.,Vol.79,p572,1994)

See Also:

Links to other databases for Orschallite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Orschallite

Ca3(SO3)2SO4•12(H2O)
Dana No: 34.08.07.01 Strunz No: 04.JE.15
Locality:

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