Cobaltkieserite Mineral Data

Cobaltkieserite Mineral Data

General Cobaltkieserite Information

Chemical Formula:

CoSO4·H2O

Composition:

Molecular Weight = 175.01 gm

Cobalt 33.00 % Co 41.96 % CoO

Silicon 0.16 % Si 0.34 % SiO₂

Arsenic 2.57 % As 3.94 % As₂O₅

Hydrogen 1.15 % H 10.29 % H₂O

Sulfur 17.41 % S 39.12 % S₂O₅

Oxygen 45.71 % O

______ ______

100.00 % 95.66 % = TOTAL OXIDE

Empirical Formula:

Co_0.98S_0.95As_0.06Si_0.01O₄·(H₂O)

Environment:

Oxidation products on a museum specimen of copper-cobalt ore collected from the Bastnas deposit.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Bastnas, near Riddarhyttan, Skinnskatteberg, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named as the Co analog of kieserite.

Synonym:

IMA2002-004

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Cobaltkieserite Crystallography

Axial Ratios:

a:b:c =0.9198:1:1.0067

Cell Dimensions:

a = 6.98, b = 7.588, c = 7.639, Z = 4; beta = 118.65° V = 355.06 Den(Calc)= 3.27

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 3.405(1)(112), 3.062(0.56)(200), 2.513(0.49)(022),3.339(0.34)(111), 4.829(0.33)(111), 3.291(0.32), 2.567(0.3),

Crystal Structure:

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Wildner M , Giester G , Neues Jahrbuch fur Mineralogie, Monatshefte , 1991 (1991) p.296-306, The crystal structures of kieserite-type compounds., I. Crystal structures of Me(II)SO4*H2O (Me = Mn,Fe,Co,Ni,Zn), Locality: synthetic

Physical Properties of Cobaltkieserite

Color:

Pink.

Diaphaniety:

Translucent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Powdery - Forms a loose, poorly-coherent pulverulent mass.

Habit:

Water Soluble - Water soluble mineral.

Hardness:

2-3 - Gypsum-Calcite

Luster:

Earthy (Dull)

Streak:

pale pink

Optical Properties of Cobaltkieserite

Optical Data:

Biaxial (+)

NCalc= 1.38 - from Gladstone-Dale relationship (KC = 0.1172) where Ncalc=Dcalc*KC+1

Calculated Properties of Cobaltkieserite

Electron Density:

r_electron=3.21 gm/cc
note: r_{Cobaltkieserite}=3.27 gm/cc.

Fermion Index

Fermion Index = 0.0016
Boson Index = 0.9984

Photoelectric:

PE_{Cobaltkieserite}= 13.83 barns/electron
U=PE_{Cobaltkieserite} x r_electron= 44.32 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cobaltkieserite is Not Radioactive

Cobaltkieserite Classification

Dana Class:

29.6.2.7 (29)Hydrated Acid and Sulfates

(29.6)where A XO4 · x(H2O)

(29.6.2)Kieserite Group (Mono-hydrates)

29.6.2.1 Kieserite MgSO4·(H2O) C 2/c 2/m

29.6.2.2 Szomolnokite FeSO4·(H2O) A2/a 2/m

29.6.2.3 Szmikite MnSO4·(H2O) A2/a 2/m

29.6.2.4 Poitevinite (Cu,Fe,Zn)SO4·(H2O) P1 1

29.6.2.5 Gunningite (Zn,Mn)SO4·(H2O) A2/a 2/m

29.6.2.6 Dwornikite (Ni,Fe)SO4·(H2O) C 2/c 2/m

29.6.2.7 Cobaltkieserite ! CoSO4·H2O C 2/c 2/m

Strunz Class:

VI/C.01-35 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium size

VI/C.01 - Kieserite group

VI/C.01-10 Kieserite MgSO4·(H2O) C 2/c 2/m

VI/C.01-20 Szomolnokite FeSO4·(H2O) A2/a 2/m

VI/C.01-30 Szmikite MnSO4·(H2O) A2/a 2/m

VI/C.01-35 Cobaltkieserite CoSO4·H2O C 2/c 2/m

VI/C.01-40 Dwornikite (Ni,Fe)SO4·(H2O) C 2/c 2/m

VI/C.01-50 Poitevinite (Cu,Fe,Zn)SO4·(H2O) P1 1

VI/C.01-60 Gunningite (Zn,Mn)SO4·(H2O) A2/a 2/m

VI/C.01-70 Sanderite MgSO4·2(H2O) Mono ? Mono

Other Cobaltkieserite Information

References:

NAME( AmMin, 41:931) PHYS. PROP.(AmMin, 41:931) OPTIC PROP.(AmMin, 41:931)

See Also:

Links to other databases for Cobaltkieserite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Cobaltkieserite

CoSO4·H2O
Dana No: 29.6.2.7 Strunz No: VI/C.01-35
Locality:

Notes: