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Leiteite Mineral Data

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General Leiteite Information

Help on Chemical  Formula: Chemical Formula: ZnAs+++2O4
Help on Composition: Composition: Molecular Weight = 279.23 gm
   Zinc     23.42 %  Zn   29.15 % ZnO
   Arsenic  53.66 %  As   70.85 % As2O3
   Oxygen   22.92 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: ZnAs2O4
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Tsumeb, Namibia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Luis Texeira-Leite (1942-), Portuguese mineral dealer who discovered the mineral.
Help on Name Pronunciation: Name Pronunciation: Leiteite Say LEITEITE
Help on Synonym: Synonym: ICSD 202249
  PDF 29-740

Leiteite Image

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Comments: Specimen of leiteite with inclusions of ludlockite. This Leiteite specimen varies from 1 to 3.5 mm in thickness.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: 3.7 x 1.3 cm.
© John Veevaert

Leiteite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9044:1:3.5039
Help on Cell Dimensions: Cell Dimensions: a = 4.542, b = 5.022, c = 17.597, Z = 4; beta = 90.81° V = 401.35 Den(Calc)= 4.62
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.133(1), 3.163(0.76), 1.685(0.49),

Physical Properties of Leiteite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Brown, Colorless, Pearl white.
Help on Density: Density: 4.31
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Leiteite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.073 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.197,KPDmeas= 0.2111,KC= 0.2126
Ncalc = 1.92 - 1.98
Help on Optical Data: Optical Data: Biaxial (+), a=1.87, b=1.88, g=1.98, bire=0.1100, 2V(Calc)=38, 2V(Meas)=27. Dispersion r < v very strong.

Calculated Properties of Leiteite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.95 gm/cc
note: Specific Gravity of Leiteite =4.31 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0097113529
Boson Index = 0.9902886471
Help on Photoelectric: Photoelectric: PELeiteite = 50.04 barns/electron
U=PELeiteite x rElectron Density= 197.72 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Leiteite is Not Radioactive

Leiteite Classification

Help on  Dana Class: Dana Class: (45)Acid and normal Antimonites, Arsenites and Phosphites
  (45.01)with miscellaneous formulae
  (45.01.07)Dana Group Leiteite ZnAs2O4 P 21/c 2/m
Help on  Strunz Class: Strunz Class: 04.JA.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JA -Arsenites, antimonites, bismuthites; without additional anions, without H2O
04.JA.05 Leiteite ZnAs2O4 P 21/c 2/m

Other Leiteite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Leiteite :
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: 04.JA.05





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