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Neyite Mineral Data

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General Neyite Information

Help on Chemical  Formula: Chemical Formula: AgCu3Pb12.5Bi13S34
Help on Composition: Composition: Molecular Weight = 6,619.03 gm
   Copper    2.88 %  Cu
   Silver    1.63 %  Ag
   Bismuth  41.04 %  Bi
   Lead     37.88 %  Pb
   Sulfur   16.57 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: AgCu3Pb12.1Bi13S34.2
Help on Environment: Environment: Primary sulfide mineral in a porphyry molybdenum deposit.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Lime Creek Molybdenum deposit, Patsy Creek, Alice Arm, British Columbia, Canada Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Charles Stewart Ney (1918-1975 ), Geologist.
Help on Name Pronunciation: Name Pronunciation: Neyite Say NEYITE
Help on Synonym: Synonym: IMA1968-017

Neyite Image

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Comments: Black foliated metallic neyite on quartz.
Location: near Hope, British Columbia, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Neyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =9.2192:1:10.736
Help on Cell Dimensions: Cell Dimensions: a = 37.527, b = 4.0705, c = 43.701, Z = 4; beta = 108.801° V = 6,319.31 Den(Calc)= 6.96
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.92(1), 3.51(1), 3.72(1),

Physical Properties of Neyite

Help on Cleavage: Cleavage: None
Help on Color: Color: Lead gray, Gray blue, Yellow blue, Silver gray.
Help on Density: Density: 7.02
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: gray

Optical Properties of Neyite

Help on RL Anisotrophism: RL Anisotrophism: Moderate, light gray, yellow-green, and light reddish brown to gray-black.
Help on RL Color: RL Color: Galena white.

Calculated Properties of Neyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.79 gm/cc
note: Specific Gravity of Neyite =6.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PENeyite =1,500.32 barns/electron
U=PENeyite x rElectron Density=8,684.44 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Neyite is Not Radioactive

Neyite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.05.01)Dana Group Neyite AgCu3Pb12.5Bi13S34 C 2/m 2/m IMA2008-053! Cu7Pb27Bi25S68 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.JB.25i 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JB -Galena derivatives, with Pb
02.JB.25i Neyite AgCu3Pb12.5Bi13S34 C 2/m 2/m
02.JB.25i IMA2008-053! Cu7Pb27Bi25S68 C 2/m 2/m

Other Neyite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Neyite :
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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Dana No: Strunz No: 02.JB.25i





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