Hydromolysite Mineral Data

General Hydromolysite Information

Chemical Formula:

FeCl3•6(H2O)

Composition:

Molecular Weight = 270.30 gm

Iron 20.66 % Fe 29.54 % Fe₂O₃

Hydrogen 4.47 % H 39.99 % H₂O

Chlorine 39.35 % Cl 39.35 % Cl

- % Cl -8.88 % -O=Cl₂

Oxygen 35.52 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺Cl₃•6(H₂O)

Environment:

Sea water alteration of pyrite.

IMA Status:

Discredited IMA 1968

Locality:

Rio Marina, Elba, Italy. Link to MinDat.org Location Data.

Name Origin:

Named in 1965 for the composition.

Name Pronunciation:

Hydromolysite + Pronunciation

Synonym:

Discredited

ICSD 30453

PDF 33-645

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Hydromolysite Crystallography

Axial Ratios:

a:b:c =1.6835:1:0.8468

Cell Dimensions:

a = 11.834, b = 7.029, c = 5.9524, Z = 2; beta = 100.47° V = 486.88 Den(Calc)= 1.84

Crystal System:

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

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

By Intensity(I/I_o): 5.824(1), 5.866(0.8), 3.163(0.15),

Physical Properties of Hydromolysite

Color:

Orange red.

Density:

1.84

Streak:

yellow orange

Calculated Properties of Hydromolysite

Electron Density:

Bulk Density (Electron Density)=1.87 gm/cc
note: Specific Gravity of Hydromolysite =1.84 gm/cc.

Fermion Index:

Fermion Index = 0.0045573942
Boson Index = 0.9954426058

Photoelectric:

PE_{Hydromolysite}= 8.55 barns/electron
U=PE_{Hydromolysite} x rElectron Density= 15.94 barns/cc.

Radioactivity:

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

Hydromolysite Classification

Dana Class:

09.03.02.01 (09)Anhydrous and Hydrated Halides

(09.03)Dana Type

(09.03.02)Dana Group

09.03.02.01 Hydromolysite? FeCl3•6(H2O) C 2/m 2/m

Strunz Class:

03.XX.00 03 - Halogenides

03.X - Unclassified Strunz Halogenides

03.XX -Chloride, Hydrated

03.XX.00 Hydrophilite? CaCl2 Pnnm 2/m 2/m 2/m

03.XX.00 Hydromolysite? FeCl3•6(H2O) C 2/m 2/m

03.XX.00 Lorettoite? Pb7O6Cl2 pseudo-TET Ortho

03.XX.00 Yttrocerite* CaF2(Y,Ce)F3 Unk Cubic

03.XX.00 IMA2009-014 SrF2 F m3m 4/m 3 2/m

03.XX.00 IMA2009-015 NaSrCeF6 P 6₃/m 6/m

Other Hydromolysite Information

References:

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

See Also:

Links to other databases for Hydromolysite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Hydromolysite

FeCl3•6(H2O)
Dana No: 09.03.02.01 Strunz No: 03.XX.00
Locality:

Notes: