Chvaleticeite Mineral Data

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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

Diaphaneity:

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
Ncalc = 1.46 - 1.48

Optical Data:

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

Calculated Properties of Chvaleticeite

Electron Density:

Bulk Density (Electron Density)=1.97 gm/cc
note: Specific Gravity of Chvaleticeite =1.91 gm/cc.

Fermion Index:

Fermion Index = 0.0036857683
Boson Index = 0.9963142317

Photoelectric:

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

Radioactivity:

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

Chvaleticeite Classification

Dana Class:

29.06.08.06 (29)Hydrated Acid and Sulfates

(29.06)where A XO4 · x(H2O)

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

29.06.08.01 Hexahydrite MgSO4•6(H2O) A2/a 2/m

29.06.08.02 Bianchite (Zn,Fe)(SO4)•6(H2O) C 2/c 2/m

29.06.08.03 Ferrohexahydrite FeSO4•6(H2O) C 2/c 2/m

29.06.08.04 Nickelhexahydrite (Ni,Mg,Fe)(SO4)•6(H2O) C 2/c 2/m

29.06.08.05 Moorhouseite (Co,Ni,Mn)SO4•6(H2O) C 2/c 2/m

29.06.08.06 Chvaleticeite (Mn,Mg)SO4•6(H2O) C 2/c 2/m

Strunz Class:

07.CB.25 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CB -With only medium-sized cations

07.CB.25 Bianchite (Zn,Fe)(SO4)•6(H2O) C 2/c 2/m

07.CB.25 Ferrohexahydrite FeSO4•6(H2O) C 2/c 2/m

07.CB.25 Chvaleticeite (Mn,Mg)SO4•6(H2O) C 2/c 2/m

07.CB.25 Hexahydrite MgSO4•6(H2O) A2/a 2/m

07.CB.25 Moorhouseite (Co,Ni,Mn)SO4•6(H2O) C 2/c 2/m

07.CB.25 Nickelhexahydrite (Ni,Mg,Fe)(SO4)•6(H2O) C 2/c 2/m

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 - 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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Ask about Chvaleticeite here :
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Mindat.org's Discussion Groups
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Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Chvaleticeite

(Mn++,Mg)SO4•6(H2O)
Dana No: 29.06.08.06 Strunz No: 07.CB.25
Locality:

Notes: