Molysite Mineral Data +

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General Molysite Information
Chemical Formula:	Fe+++Cl3
Composition:	Molecular Weight = 162.21 gm
	Iron      34.43 %  Fe   49.23 % Fe2O3
	Chlorine  65.57 %  Cl   65.57 % Cl
	-   %  Cl  -14.80 % -O=Cl2
	______        ______
	100.00 %      100.00 % = TOTAL OXIDE
Empirical Formula:	Fe3+Cl3
Environment:	volcanic fumaroles.
IMA Status:	Valid Species (Pre-IMA) 1868
Locality:	Vesuvius, Italy Link to MinDat.org Location Data.
Molysite Image
Images:	Molysite Comments: Yellow earthy molysite coatings. Location: Sasso Pisano, Pisa, Tuscany, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Molysite Crystallography
Axial Ratios:	a:c = 1:2.91554
Cell Dimensions:	a = 5.92, c = 17.26, Z = 6; V = 523.86 Den(Calc)= 3.08
Crystal System:	Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3
X Ray Diffraction:	By Intensity(I/Io): 2.68(1), 2.08(0.4), 5.9(0.32),
Physical Properties of Molysite
Cleavage:	[0001] Perfect
Color:	Brownish red, Yellow, Purple red.
Density:	2.904
Habit:	Encrustations - Forms crust-like aggregates on matrix.
Streak:	brownish yellow
Optical Properties of Molysite
Gladstone-Dale:	CI meas= 0.43 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.462 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1948,KPDmeas= 0.2066,KC= 0.3623
Optical Data:	Uniaxial (-), w=1.6.
Calculated Properties of Molysite
Electron Density:	relectron=2.76 gm/cc note: rMolysite =2.90 gm/cc.
Fermion Index	Fermion Index = 0.00729 Boson Index = 0.99271
Photoelectric:	PEMolysite = 14.93 barns/electron U=PEMolysite x relectron= 41.17 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Molysite is Not Radioactive
Molysite Classification
Dana Class:	9.3.1.1 (9)Anhydrous and Hydrated Halides
	(9.3)Dana Type
	(9.3.1)Dana Group
	9.3.1.1 Molysite FeCl3 R 3 3
Strunz Class:	III/A.09-10 III - Halogenides
	III/A - Simple Halogenides, without water Metal : Halogen = 1 : 2, 1 : 3
	III/A.09 - Fluorite series and related compounds
	III/A.09-10 Molysite FeCl3 R 3 3
	III/A.09-20 Chlorocalcite KCaCl3 Unk Ortho
Other Molysite Information
References:	NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:	Links to other databases for Molysite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - WWW-MINCRYST Search for Molysite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Molysite : AA Mineral Specimens B & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals The GeoZone Wrights Rock Shop Translate Molysite Mineral Data : Ask about Molysite here : Ask-A-Mineralogist from the Mineralogical Society of America Mindat.org's Discussion Groups Original Rockhounds Discussion Group Rockhounds Discussion Group on Yahoo Groups Mineral Discussion Forum from Fabre Minerals - also available in Español Print or Cut-and-Paste your Molysite Specimen Label here : Molysite Fe+++Cl3 Dana No: 9.3.1.1 Strunz No: III/A.09-10 Locality:   Notes: