Chvaleticeite Mineral Data

Chvaleticeite Mineral Data

General Chvaleticeite Information

Chemical Formula:

(Mn++,Mg)SO4·6(H2O)

Composition:

Molecular Weight = 251.44 gm

Magnesium 2.42 % Mg 4.01 % MgO

Manganese 16.39 % Mn 21.16 % MnO

Hydrogen 4.81 % H 42.99 % H₂O

Sulfur 12.75 % S 31.84 % SO₃

Oxygen 63.63 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_0.75Mg_0.25(SO₄)·6(H₂O)

Environment:

Found in the oxidation zone of a pyrite-manganese silicate deposit.

IMA Status:

Approved IMA 1986

Locality:

Chvaletice and Jachymov (Joachimsthal), Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Chvaleticeite Image

Images:

Chvaleticeite

Comments: Powdery mass of chvaleticeite.
Location: Chvaletice, Bohemia, Vychodocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Chvaleticeite Crystallography

Axial Ratios:

a:b:c =1.3881:1:3.3563

Cell Dimensions:

a = 10.05, b = 7.24, c = 24.3, Z = 8; beta = 98° V = 1,750.91 Den(Calc)= 1.91

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): 4.91(1), 4.47(0.8), 5.45(0.8),

Physical Properties of Chvaleticeite

Color:

Yellow green, White, Pink.

Density:

1.84

Diaphaniety:

Translucent

Habit:

Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation.

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Chvaleticeite

Gladstone-Dale:

CI meas= -0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2521,KPDmeas= 0.2617,KC= 0.2522

Optical Data:

Biaxial (?), a=1.457, g=1.506, bire=0.0490

Calculated Properties of Chvaleticeite

Electron Density:

r_electron=1.97 gm/cc
note: r_{Chvaleticeite}=1.91 gm/cc.

Fermion Index

Fermion Index = 0.00368
Boson Index = 0.99632

Photoelectric:

PE_{Chvaleticeite}= 4.88 barns/electron
U=PE_{Chvaleticeite} x r_electron= 9.62 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chvaleticeite is Not Radioactive

Chvaleticeite Classification

Dana Class:

29.6.8.6 (29)Hydrated Acid and Sulfates

(29.6)where A XO4 · x(H2O)

(29.6.8)Hexahydrite Group (Space Group: C2/c)

29.6.8.1 Hexahydrite MgSO4·6(H2O) A2/a 2/m

29.6.8.2 Bianchite (Zn,Fe)(SO4)·6(H2O) C 2/c 2/m

29.6.8.3 Ferrohexahydrite FeSO4·6(H2O) C 2/c 2/m

29.6.8.4 Nickelhexahydrite (Ni,Mg,Fe)(SO4)·6(H2O) C 2/c 2/m

29.6.8.5 Moorhouseite (Co,Ni,Mn)SO4·6(H2O) C 2/c 2/m

29.6.8.6 Chvaleticeite (Mn,Mg)SO4·6(H2O) C 2/c 2/m

Strunz Class:

VI/C.05-30 VI - Sulfates,Chromates,Molybdates and Tungstates

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

VI/C.05 - Hexahydrite group

VI/C.05-10 Hexahydrite MgSO4·6(H2O) A2/a 2/m

VI/C.05-20 Ferrohexahydrite FeSO4·6(H2O) C 2/c 2/m

VI/C.05-30 Chvaleticeite (Mn,Mg)SO4·6(H2O) C 2/c 2/m

VI/C.05-40 Moorhouseite (Co,Ni,Mn)SO4·6(H2O) C 2/c 2/m

VI/C.05-50 Nickelhexahydrite (Ni,Mg,Fe)(SO4)·6(H2O) C 2/c 2/m

VI/C.05-60 Bianchite (Zn,Fe)(SO4)·6(H2O) C 2/c 2/m

VI/C.05-70 Retgersite NiSO4·6(H2O) P 4₁2₁2,P 4₃2₁2 4 2 2

Other Chvaleticeite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.72,p1023,1987) OPTIC PROP.(Am.Min.,Vol.72,p1023,1987)

See Also:

Links to other databases for Chvaleticeite :
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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Chvaleticeite

(Mn++,Mg)SO4·6(H2O)
Dana No: 29.6.8.6 Strunz No: VI/C.05-30
Locality:

Notes: