Mineralogy Database

Namibite Mineral Data

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General Namibite Information

Help on Chemical  Formula: Chemical Formula: Cu++Bi2(VO4)O2
Help on Composition: Composition: Molecular Weight = 628.44 gm
   Vanadium   8.11 %  V    14.47 % V2O5
   Copper    10.11 %  Cu   12.66 % CuO
   Bismuth   66.51 %  Bi   74.14 % Bi2O3
   Oxygen    15.28 %  O
            ______        ______ 
            100.00 %      101.27 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CuBi2(VO4)O2
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Khorixas (formerly Welwitschia), northwestern Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the country in which it is found.
Help on Name Pronunciation: Name Pronunciation: Namibite Say NAMIBITE
Help on Synonym: Synonym: ICSD 89724
  PDF 47-1773

Namibite Image

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Comments: Dark green crystals of namibite on matrix.
Location: Pucher Shaft, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Namibite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.2099:1:2.0073
Help on Cell Dimensions: Cell Dimensions: a = 11.864, b = 3.696, c = 7.419, Z = 2; beta = 109.7° V = 306.28 Den(Calc)= 6.81
Help on Crystal System: Crystal System: Monoclinic Space Group: C 2/m,Cm,C 2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.018(1), 3.574(0.75), 5.58(0.7),

Physical Properties of Namibite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Dark green.
Help on Density: Density: 6.86
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Streak: Streak: pistachio green

Optical Properties of Namibite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.129 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.123 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1615,KPDmeas= 0.1603,KC= 0.1842
Ncalc = 2.25 - 2.26
Help on Optical Data: Optical Data: Biaxial (-), a=2.1, 2V(Meas)=moderate.
Help on Pleochroism (x): Pleochroism (x): yellow green.
Help on Pleochroism (y): Pleochroism (y): pistachio green.
Help on Pleochroism (z): Pleochroism (z): dark green.

Calculated Properties of Namibite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.76 gm/cc
note: Specific Gravity of Namibite =6.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002766353
Boson Index = 0.9997233647
Help on Photoelectric: Photoelectric: PENamibite =1,271.11 barns/electron
U=PENamibite x rElectron Density=7,327.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Namibite is Not Radioactive

Namibite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.05)with miscellaneous formulae
  (38.05.09)Dana Group Namibite CuBi2(VO4)O2 C 2/m,Cm,C 2 Mono Urusovite! Cu[AlAsO5] P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.BB.50 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1
08.BB.50 Namibite CuBi2(VO4)O2 C 2/m,Cm,C 2 Mono

Other Namibite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Namibite :
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: 08.BB.50





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