General Incaite Information
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 Chemical Formula: |
Pb4Sn4FeSb2S15 |
| Composition: |
Molecular Weight = 2,083.98 gm |
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Iron 2.68 % Fe |
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Tin 22.79 % Sn |
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Antimony 11.68 % Sb |
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Lead 39.77 % Pb |
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Sulfur 23.08 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb4Sn4Fe2+Sb2S15 |
| Environment: |
In hydrothermal Ag-Sn ores. |
| IMA Status: |
Approved IMA 1974 |
| Locality: |
Poopo, Bolivia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the Inca people, pre-European rulers of Chile, Bolivia, and Peru. |
| Name Pronunciation: |
Incaite  |
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Incaite Image |
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Images:
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Incaite
Comments: Formless gray lump of incaite, sawn on 2 sides. Former Franz Bauer (Munich) collection.
Location: The label says "Mejillones, Chile" which is certainly wrong, but Mejillones is a railhead and port which served exports from Pirquitas Ag-Sn Deposit, Rinconada Department, Jujuy, Argentina.
Scale: Lump size 2 mm.
© Richard Dale / Dale Minerals |
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Incaite Crystallography
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| Axial Ratios: |
a:b:c =2.9861:1:1.0069 |
| Cell Dimensions: |
a = 17.29, b = 5.79, c = 5.83, Z = 1; alpha = 90°, beta = 90°, gamma = 90° V = 583.64 Den(Calc)= 5.93 |
| Crystal System: |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 ? |
| X Ray Diffraction: |
By Intensity(I/Io): 2.86(1), 2.03(0.8), 3.43(0.7),4.31(0.6), 2.06(0.4), 3.12(0.4), 3.23(0.4), 3.83(0.4), |
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Physical Properties of Incaite
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| Cleavage: |
{100} Perfect |
| Color: |
Lead gray. |
| Diaphaneity: |
Opaque |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
2 - Gypsum |
| Luster: |
Metallic |
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Optical Properties of Incaite
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| RL Anisotrophism: |
Distinct in greenish brown and brownish gray. |
| RL Color: |
Grayish white. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Incaite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 480 nm |
29.80 |
33.70 | |
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| 540 nm |
29.00 |
33.20 |
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| 600 nm |
28.60 |
32.90 |
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| 640 nm |
28.10 |
32.50 |
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Calculated Relative Intensity Colors of Incaite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
310% |
| R1 |
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| R2 |
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Calculated Properties of Incaite
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| Electron Density: |
Bulk Density (Electron Density)=5.10 gm/cc
note: Specific Gravity of Incaite =5.93 gm/cc.
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| Fermion Index: |
Fermion Index = 0.12
Boson Index = 0.88 |
| Photoelectric: |
PEIncaite = 825.20 barns/electron
U=PEIncaite x rElectron Density=4,207.82 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Incaite is Not Radioactive |
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Incaite Classification
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| Dana Class: |
03.01.04.03 (03)Sulfides - Sulfosalts |
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(03.01)where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.01.04)Cylindrite Group |
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03.01.04.01 Cylindrite Pb3Sn4FeSb2S14 P1 1 |
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03.01.04.02 Franckeite (Pb,Sn)6FeSn2Sb2S14 P1 1 |
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03.01.04.03 Incaite Pb4Sn4FeSb2S15 P1 ? 1 |
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03.01.04.04 Potosiite Pb6Sn2FeSb2S14 P 1 ? 1 |
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03.01.04.05 Abramovite! Pb2SnInBiS7 P1 1 |
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03.01.04.06 Coiraite! (Pb,Sn)12.5As3Sn5FeS28 Unk Mono |
| Strunz Class: |
02.HF.25b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HF -With SnS and PbS archetype structure units |
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02.HF.25b Franckeite (Pb,Sn)6FeSn2Sb2S14 P1 1 |
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02.HF.25b Incaite Pb4Sn4FeSb2S15 P1 ? 1 |
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02.HF.25b Potosiite Pb6Sn2FeSb2S14 P 1 ? 1 |
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02.HF.25b Coiraite! (Pb,Sn)12.5As3Sn5FeS28 Unk Mono |
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Other Incaite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Incaite :
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
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Print or Cut-and-Paste your Incaite Specimen Label here :
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Incaite
Pb4Sn4FeSb2S15
Dana No: 03.01.04.03 Strunz No: 02.HF.25b
Locality:
Notes:
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