Mineralogy Database

Coiraite Mineral Data

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General Coiraite Information

Help on Chemical  Formula: Chemical Formula: (Pb,Sn)12.5As3Sn5FeS28
Help on Composition: Composition: Molecular Weight = 4,256.03 gm
   Iron      1.44 %  Fe
   Silver    0.33 %  Ag
   Tin      17.29 %  Sn
   Arsenic   5.26 %  As
   Lead     54.57 %  Pb
   Sulfur   21.10 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Pb11.21Sn1.3As2.99Ag0.13Fe2+1.1Sn4.9S28
Help on Environment: Environment: Franckeite solid-solution series. Coiraite has two monoclinic sub-cells, Q (pseudotetragonal) and H (pseudohexagonal).
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Pirquitas mining district, Puna Region, Rinconada Department, Jujuy Province, Argentina. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Help on Synonym: Synonym: IMA2005-024

Coiraite Image

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Comments: Dark grayish, micro-crystalline aggregates of coiraite with sphalerite.
Location: Mina Pirquitas, Dep. Rinconada, Province Jujuy, Argentina. Scale: Not Given.
© Diederik Visser

Coiraite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9965:1:2.9556
Help on Cell Dimensions: Cell Dimensions: a = 5.84, b = 5.86, c = 17.32, Z = 1; beta = 94.14° V = 591.19 Den(Calc)= 11.95
Help on Crystal System: Crystal System: Monoclinic Space Group: Unk
Help on X Ray Diffraction: 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),

Physical Properties of Coiraite

Help on Color: Color: Gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Colloform - Forming from a gel or colloidal mass.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Calculated Properties of Coiraite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=10.2 gm/cc
note: Specific Gravity of Coiraite =12.0 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PECoiraite =1,047.26 barns/electron
U=PECoiraite x rElectron Density=10648.07 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coiraite is Not Radioactive

Coiraite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.01)where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.01.04)Cylindrite Group Cylindrite Pb3Sn4FeSb2S14 P1 1 Franckeite (Pb,Sn)6FeSn2Sb2S14 P1 1 Incaite Pb4Sn4FeSb2S15 P1 ? 1 Potosiite Pb6Sn2FeSb2S14 P 1 ? 1 Abramovite! Pb2SnInBiS7 P1 1 Coiraite! (Pb,Sn)12.5As3Sn5FeS28 Unk Mono
Help on  Strunz Class: Strunz Class: 02.HF.25b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HF -With SnS and PbS archetype structure units
02.HF.25b Franckeite (Pb,Sn)6FeSn2Sb2S14 P1 1
02.HF.25b Incaite Pb4Sn4FeSb2S15 P1 ? 1
02.HF.25b Potosiite Pb6Sn2FeSb2S14 P 1 ? 1
02.HF.25b Coiraite! (Pb,Sn)12.5As3Sn5FeS28 Unk Mono

Other Coiraite Information

Help on References: References: NAME( MinMag, v72:1083) PHYS. PROP.(MinMag, v72:1083) OPTIC PROP.(MinMag, v72:1083)
Help on See Also: 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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Dana No: Strunz No: 02.HF.25b





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