Orschallite Mineral Data

Orschallite Mineral Data +

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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.

Synonym:

ICSD 73997

IMA1990-041

PDF 45-1484

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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 ScalenohedralH-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),

Crystal Structure:

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Weidenthaler C , Tillmanns E , Hentschel G , Mineralogy and Petrology , 48 (1993) p.167-177, Orschallite, Ca3(SO3)2SO4*12H2O, a new, calcium-sulfite-sulfate-hydrate mineral, Locality: Hannebacher Ley, Hannebach, Eifel, Germany

Physical Properties of Orschallite

Cleavage:

None

Color:

Colorless.

Density:

1.9

Diaphaniety:

Transparent

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Orschallite

Optical Data:

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

Calculated Properties of Orschallite

Electron Density:

r_electron=1.94 gm/cc
note: r_Orschallite=1.87 gm/cc.

Fermion Index

Fermion Index = 0.00178
Boson Index = 0.99822

Photoelectric:

PE_Orschallite= 3.45 barns/electron
U=PE_Orschallite x r_electron= 6.70 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Orschallite is Not Radioactive

Orschallite Classification

Dana Class:

34.8.7.1 (34)Selenites - Tellurites - Sulfites

(34.8)Dana Type

(34.8.7)Dana Group

34.8.7.1 Orschallite Ca3(SO3)2SO4·12(H2O) R 3c 3 2/m

Strunz Class:

IV/K.05-15 IV - Oxides

IV/K - Sulfides, selenides, tellurides with [XO3]2- groups and related structures

IV/K.05 - Gravegliaite - sophiite series

IV/K.05-05 Gravegliaite Mn(SO3)·3(H2O) P nma 2/m 2/m 2/m

IV/K.05-10 Hannebachite 2CaSO3·(H2O) Pbna 2/m 2/m 2/m

IV/K.05-15 Orschallite Ca3(SO3)2SO4·12(H2O) R 3c 3 2/m

IV/K.05-20 Graemite CuTeO3·(H2O) Pcmm 2/m 2/m 2/m

IV/K.05-30 Choloalite CuPb(TeO3)2 Unk Cubic

IV/K.05-40 Sophiite Zn2(SeO3)Cl2 Pccn 2/m 2/m 2/m

IV/K.05-70 Burnsite! KCdCu7O2(SeO3)2Cl9 P 6₃/mmc 6/m 2/m 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Orschallite Specimen Label here :

Orschallite

Ca3(SO3)2SO4·12(H2O)
Dana No: 34.8.7.1 Strunz No: IV/K.05-15
Locality:

Notes: