Ferrohexahydrite Mineral Data

General Ferrohexahydrite Information

Chemical Formula:

Fe++SO4•6(H2O)

Composition:

Molecular Weight = 260.00 gm

Iron 21.48 % Fe 27.63 % FeO

Hydrogen 4.65 % H 41.57 % H₂O

Sulfur 12.33 % S 30.79 % SO₃

Oxygen 61.54 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺(SO₄)•6(H₂O)

IMA Status:

Approved IMA 1962

Locality:

Sofiya Mine, Nikitovka Deposit, Novyy Donbass, Gorlovka, Doneck Oblast', Ukraine Link to MinDat.org Location Data.

Name Origin:

Named for the composition, FERROus iron and HEXAHYDrate in allusion to the six water molecules in the crystal structure.

Name Pronunciation:

Ferrohexahydrite + Pronunciation

Ferrohexahydrite Image

Images:

Ferrohexahydrite

Comments: White to light brownish crust of ferrohexahydrite on matrix.
Location: Sohland, Bautzen, Oberlausitz, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Ferrohexahydrite Crystallography

Axial Ratios:

a:b:c =1.3846:1:3.3777

Cell Dimensions:

a = 10.08, b = 7.28, c = 24.59, Z = 8; beta = 98.3° V = 1,785.57 Den(Calc)= 1.93

Crystal System:

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

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

By Intensity(I/I_o): 4.43(1), 2.93(0.7), 2.97(0.7),

Physical Properties of Ferrohexahydrite

Color:

Colorless.

Density:

1.934

Diaphaneity:

Transparent

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Ferrohexahydrite

Gladstone-Dale:

CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2503,KPDmeas= 0.2497,KC= 0.2478
Ncalc = 1.48

Optical Data:

Biaxial (?), a=1.468, g=1.498, bire=0.0300

Calculated Properties of Ferrohexahydrite

Electron Density:

Bulk Density (Electron Density)=1.99 gm/cc
note: Specific Gravity of Ferrohexahydrite =1.93 gm/cc.

Fermion Index:

Fermion Index = 0.0057809601
Boson Index = 0.9942190399

Photoelectric:

PE_{Ferrohexahydrite}= 6.93 barns/electron
U=PE_{Ferrohexahydrite} x rElectron Density= 13.82 barns/cc.

Radioactivity:

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

Ferrohexahydrite Classification

Dana Class:

29.06.08.03 (29)Hydrated Acid and Sulfates

(29.06)where A XO4 ï¿½ 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 Ferrohexahydrite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ferrohexahydrite :
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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Ferrohexahydrite

Fe++SO4•6(H2O)
Dana No: 29.06.08.03 Strunz No: 07.CB.25
Locality:

Notes:

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