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Apuanite Mineral Data
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General Apuanite Information
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 Chemical Formula: |
Fe++Fe+++4Sb+++4O12S |
| Composition: |
Molecular Weight = 990.29 gm |
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Iron 28.20 % Fe 7.26 % FeO / 32.25 % Fe2O3 |
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Antimony 49.18 % Sb 58.87 % Sb2O3 |
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Sulfur 3.24 % S 3.24 % S2- |
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- % S -1.62 % -O=S |
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Oxygen 19.39 % O |
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______ ______ |
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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. |
| Name Pronunciation: |
Apuanite  |
| Synonym: |
ICSD 100541 |
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PDF 33-642 |
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Apuanite Image |
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Images:
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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 |
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Apuanite Crystallography
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| 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 Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 41/mbc |
| X Ray Diffraction: |
By Intensity(I/Io): 3.168(1), 1.922(0.47), 2.957(0.43), |
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Physical Properties of Apuanite
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| Cleavage: |
{110} Perfect |
| Color: |
Black. |
| Density: |
5.33 |
| Diaphaneity: |
Opaque |
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
| Hardness: |
4-5 - Fluorite-Apatite |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Apuanite
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| Optical Data: |
Uniaxial (?). |
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NCalc= 2.23 - from Gladstone-Dale relationship (KC = 0.2347) where Ncalc=Dcalc*KC+1
NCalc= 2.25 - from Gladstone-Dale relationship (KC = 0.2347) where Ncalc=Dmeas*KC+1
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| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Apuanite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 470 nm |
19.10 |
20.80 |
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| 546 nm |
21.90 |
19.60 |
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| 589 nm |
21.60 |
18.40 |
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| 650 nm |
19.60 |
16.90 |
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Calculated Relative Intensity Colors of Apuanite in Air
Relative
Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
450% |
490% |
| R1 |
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| R2 |
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Calculated Properties of Apuanite
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| Electron Density: |
Bulk Density (Electron Density)=4.71 gm/cc
note: Specific Gravity of Apuanite =5.23 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0063137157
Boson Index = 0.9936862843 |
| Photoelectric: |
PEApuanite = 169.84 barns/electron
U=PEApuanite x rElectron Density= 800.10 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Apuanite is Not Radioactive |
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Apuanite Classification
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| Dana Class: |
45.01.09.01 (45)Acid and normal Antimonites, Arsenites and Phosphites |
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(45.01)with miscellaneous formulae |
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(45.01.09)Dana Group |
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45.01.09.01 Apuanite FeFe4Sb4O12S P 41/mbc 4/m 2/m 2/m |
| Strunz Class: |
04.JA.25 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.J - Arsenites, Antimonites, Bismuthites, Sulfites, |
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04.JA -Arsenites, antimonites, bismuthites; without additional anions, without H2O |
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04.JA.25 Apuanite FeFe4Sb4O12S P 41/mbc 4/m 2/m 2/m |
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Other Apuanite Information
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| 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 - 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
15 - WWW-MINCRYST
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Apuanite
Fe++Fe+++4Sb+++4O12S
Dana No: 45.01.09.01 Strunz No: 04.JA.25
Locality:
Notes:
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