Versiliaite Mineral Data

Versiliaite Mineral Data +

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General Versiliaite Information

Chemical Formula:

Fe++4Fe+++8Sb+++12O23S2

Composition:

Molecular Weight = 2,563.28 gm

Iron 26.14 % Fe 11.21 % FeO / 24.92 % Fe₂O₃

Antimony 57.00 % Sb 68.23 % Sb₂O₃

Sulfur 2.50 % S 2.50 % S^2-

- % S -1.25 % -O=S

Oxygen 14.36 % O

______ ______

100.00 % 105.62 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺₄Fe³⁺₈Sb₁₂O₂₃S₂

Environment:

In an iron deposit in barite formed by metasomatic processes at the contact between phyllites and dolostones.

IMA Status:

Approved IMA 1979

Locality:

Buca della Vena mine, Versilia valley, Apuan Alps, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 100540

PDF 33-698

Versiliaite Image

Images:

Versiliaite

Comments: Black sub-metallic versiliaite masses in marble.
Location: Bucca della Vena Mine, Val di Castello Carducci, Tuscany, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Versiliaite Crystallography

Axial Ratios:

a:b:c =1.0207:1:1.4334

Cell Dimensions:

a = 8.499, b = 8.326, c = 11.935, Z = 1; V = 844.55 Den(Calc)= 5.04

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbam ?

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

By Intensity(I/I_o): 3.196(1), 3.16(0.97), 2.972(0.81),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Mellini M , Merlino S , American Mineralogist , 64 (1979) p.1235-1242, Versiliaite and apuanite: Derivative structures related to schafarzikite

Physical Properties of Versiliaite

Cleavage:

[110] Perfect

Color:

Black.

Density:

5.12

Diaphaniety:

Opaque

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

5 - Apatite

Luster:

Metallic

Streak:

black

Optical Properties of Versiliaite

Optical Data:

Uniaxial (?).

NCalc= 2.09 - from Gladstone-Dale relationship (KC = 0.217) where Ncalc=Dcalc*KC+1
NCalc= 2.11 - from Gladstone-Dale relationship (KC = 0.217) where Ncalc=Dmeas*KC+1

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Versiliaite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	18.50	19.40
546 nm	18.50	17.80
589 nm	18.30	16.90
650 nm	17.70	16.20

**Calculated Relative Intensity Colors of Versiliaite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	520%
R₁
R₂

Calculated Properties of Versiliaite

Electron Density:

r_electron=4.48 gm/cc
note: r_Versiliaite=5.04 gm/cc.

Fermion Index

Fermion Index = 0.00579
Boson Index = 0.99421

Photoelectric:

PE_Versiliaite= 197.10 barns/electron
U=PE_Versiliaite x r_electron= 883.60 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Versiliaite is Not Radioactive

Versiliaite Classification

Dana Class:

45.1.10.1 (45)Acid and normal Antimonites, Arsenites and Phosphites

(45.1)with miscellaneous formulae

(45.1.10)Dana Group

45.1.10.1 Versiliaite Fe4Fe8Sb12O23S2 Pbam ? 2/m 2/m 2/m

Strunz Class:

IV/B.06-30 IV - Oxides

IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related)

IV/B.06 - Trippkeite - Minium series

IV/B.06-10 Trippkeite CuAs2O4 P 4₁/mbc 4/m 2/m 2/m

IV/B.06-15 Kusachiite CuBi2O4 P 4/ncc 4/m 2/m 2/m

IV/B.06-20 Schafarzikite FeSb2O4 P 4₁/mbc 4/m 2/m 2/m

IV/B.06-30 Versiliaite Fe4Fe8Sb12O23S2 Pbam ? 2/m 2/m 2/m

IV/B.06-40 Apuanite FeFe4Sb4O12S P 4₁/mbc 4/m 2/m 2/m

IV/B.06-50 Minium Pb2PbO4 P 4₁/mbc 4/m 2/m 2/m

Other Versiliaite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Versiliaite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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

Versiliaite

Fe++4Fe+++8Sb+++12O23S2
Dana No: 45.1.10.1 Strunz No: IV/B.06-30
Locality:

Notes: