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Coiraite Mineral Data
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General Coiraite Information
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 Chemical Formula: |
(Pb,Sn)12.5As3Sn5FeS28 |
| Composition: |
Molecular Weight = 4,256.03 gm |
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Iron 1.44 % Fe |
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Silver 0.33 % Ag |
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Tin 17.29 % Sn |
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Arsenic 5.26 % As |
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Lead 54.57 % Pb |
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Sulfur 21.10 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb11.21Sn1.3As2.99Ag0.13Fe2+1.1Sn4.9S28 |
| Environment: |
Franckeite solid-solution series. Coiraite has two monoclinic sub-cells, Q (pseudotetragonal) and H (pseudohexagonal). |
| IMA Status: |
Approved IMA 2005 (Dana # Added) |
| Locality: |
Pirquitas mining district, Puna Region, Rinconada Department, Jujuy Province, Argentina. Link to MinDat.org Location Data. |
| Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) |
| Synonym: |
IMA2005-024 |
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Coiraite Image |
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Images:
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Coiraite
Comments: Dark grayish, micro-crystalline aggregates of coiraite with sphalerite.
Location: Mina Pirquitas, Dep. Rinconada, Province Jujuy, Argentina.
Scale: Not Given.
© Diederik Visser |
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Coiraite Crystallography
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| Axial Ratios: |
a:b:c =0.9965:1:2.9556 |
| Cell Dimensions: |
a = 5.84, b = 5.86, c = 17.32, Z = 1; beta = 94.14° V = 591.19 Den(Calc)= 11.95 |
| Crystal System: |
Monoclinic Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 2.876(1), 2.068(0.6), 4.34(0.4),3.46(0.3), 3.339(0.2), 5.78(0.2), |
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Physical Properties of Coiraite
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| Color: |
Gray. |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Colloform - Forming from a gel or colloidal mass. |
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. |
| Luster: |
Metallic |
| Streak: |
black |
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Calculated Properties of Coiraite
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| Electron Density: |
Bulk Density (Electron Density)=10.2 gm/cc
note: Specific Gravity of Coiraite =12.0 gm/cc.
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| Fermion Index: |
Fermion Index = 0.15
Boson Index = 0.85 |
| Photoelectric: |
PECoiraite =1,047.26 barns/electron
U=PECoiraite x rElectron Density=10648.07 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coiraite is Not Radioactive |
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Coiraite Classification
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| Dana Class: |
03.01.04.06 (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 Coiraite Information
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| References: |
NAME( MinMag, v72:1083) PHYS. PROP.(MinMag, v72:1083) OPTIC PROP.(MinMag, v72:1083) |
| See Also: |
Links to other databases for Coiraite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Coiraite
(Pb,Sn)12.5As3Sn5FeS28
Dana No: 03.01.04.06 Strunz No: 02.HF.25b
Locality:
Notes:
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