Apuanite Mineral Data

Apuanite Mineral Data +

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General Apuanite Information

Chemical Formula:

Fe++Fe+++4Sb+++4O12S

Composition:

Molecular Weight = 990.29 gm

Iron 28.20 % Fe 7.26 % FeO / 32.25 % Fe₂O₃

Antimony 49.18 % Sb 58.87 % Sb₂O₃

Sulfur 3.24 % S 3.24 % S^2-

- % S -1.62 % -O=S

Oxygen 19.39 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺Fe³⁺₄Sb₄O₁₂S

Environment:

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

IMA Status:

Approved IMA 1978

Locality:

Buca della Vena mine, northeast of Stazzema, Apuan Alps, Tuscany, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 100541

PDF 33-642

Apuanite Image

Images:

Apuanite

Comments: Black tabular crystal of apuanite on matrix.
Location: Buca della Vena Mine, Stazzema, Versilia Valley, Apuan Alps, Tuscany, Italy. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Apuanite Crystallography

Axial Ratios:

a:c = 1:2.1464

Cell Dimensions:

a = 8.367, c = 17.959, Z = 4; V = 1,257.25 Den(Calc)= 5.23

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4₁/mbc

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

By Intensity(I/I_o): 3.168(1), 1.922(0.47), 2.957(0.43),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
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Mellini M , Merlino S , American Mineralogist , 64 (1979) p.1235-1242, Versliaite and apuanite: Derivative structures related to schafarzikite

Physical Properties of Apuanite

Cleavage:

[110] Perfect

Color:

Black.

Density:

5.33

Diaphaniety:

Opaque

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

4-5 - Fluorite-Apatite

Luster:

Metallic

Streak:

black

Optical Properties of Apuanite

Optical Data:

Uniaxial (?).

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Apuanite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	19.10	20.80
546 nm	21.90	19.60
589 nm	21.60	18.40
650 nm	19.60	16.90

**Calculated Relative Intensity Colors of Apuanite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	450%	490%
R₁
R₂

Calculated Properties of Apuanite

Electron Density:

r_electron=4.71 gm/cc
note: r_Apuanite=5.23 gm/cc.

Fermion Index

Fermion Index = 0.00631
Boson Index = 0.99369

Photoelectric:

PE_Apuanite= 169.84 barns/electron
U=PE_Apuanite x r_electron= 800.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Apuanite is Not Radioactive

Apuanite Classification

Dana Class:

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

(45.1)with miscellaneous formulae

(45.1.9)Dana Group

45.1.9.1 Apuanite FeFe4Sb4O12S P 4₁/mbc 4/m 2/m 2/m

Strunz Class:

IV/B.06-40 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 Apuanite Information

References:

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

See Also:

Links to other databases for Apuanite :
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 Apuanite Specimen Label here :

Apuanite

Fe++Fe+++4Sb+++4O12S
Dana No: 45.1.9.1 Strunz No: IV/B.06-40
Locality:

Notes: