Mineralogy Database

Mottramite Mineral Data

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General Mottramite Information

Help on Chemical  Formula: Chemical Formula: PbCu(VO4)(OH)
Help on Composition: Composition: Molecular Weight = 402.69 gm
   Vanadium  12.65 %  V    22.58 % V2O5
   Copper    15.78 %  Cu   19.75 % CuO
   Hydrogen   0.25 %  H     2.24 % H2O
   Lead      51.45 %  Pb   55.43 % PbO
   Oxygen    19.87 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbCu(VO4)(OH)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1876
Help on Locality: Locality: Mottram, St. Andrews, Cheshire, England. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Mottramite + Pronunciation Say MOTTRAMITE
Help on Synonym: Synonym: Cuprodescloizite
  ICSD 72457
  PDF 43-1463

Mottramite Image

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  Mottramite   Beaverite

Comments: Specimen of quartz with a thick druse of green mottramite (cuprodescloizite) crystals and a scattered grouping of micro beaverite crystals (lemon yellow in color).
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: 3.3 x 2.5 cm.
© John Veevaert

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Comments: Botryoidal green mottramite on white calcite.
Location: Tsumeb Mine,Tsumeb, Namibia. Scale: 7.5 cm by 8 cm.
© Kevin Ward

Mottramite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8262:1:0.6472
Help on Cell Dimensions: Cell Dimensions: a = 7.685, b = 9.301, c = 6.02, Z = 4; V = 430.30 Den(Calc)= 6.22
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.24(1), 2.87(0.8), 5.07(0.8),

Physical Properties of Mottramite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Brown red, Brownish black, Green, Dark green.
Help on Density: Density: 5.9 - 6, Average = 5.95
Help on Diaphaneity: Diaphaneity: Transparent to Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Plumose - "Mica-like" minerals forming aggregates of plume-like forms.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: light brownish green

Optical Properties of Mottramite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.125 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.076 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2063,KPDmeas= 0.2157,KC= 0.1917
Ncalc = 2.13 - 2.19
Help on Optical Data: Optical Data: Biaxial (-), a=2.21, b=2.31, g=2.33, bire=0.1200, 2V(Calc)=46, 2V(Meas)=73.

Calculated Properties of Mottramite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.41 gm/cc
note: Specific Gravity of Mottramite =6.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PEMottramite = 919.10 barns/electron
U=PEMottramite x rElectron Density=4,968.74 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mottramite is Not Radioactive

Mottramite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.02)Descloizite Group Descloizite PbZn(VO4)(OH) Pnam 2/m 2/m 2/m Mottramite PbCu(VO4)(OH) Pnam 2/m 2/m 2/m Pyrobelonite PbMn(VO4)(OH) Pnam 2/m 2/m 2/m Cechite Pb(Fe,Mn)(VO4)(OH) Pnam 2/m 2/m 2/m Duftite-alpha PbCu(AsO4)(OH) P 212121 2 2 2
Help on  Strunz Class: Strunz Class: 08.BH.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
08.BH.40 Descloizite PbZn(VO4)(OH) Pnam 2/m 2/m 2/m
08.BH.40 Cechite Pb(Fe,Mn)(VO4)(OH) Pnam 2/m 2/m 2/m
08.BH.40 Duhamelite? Pb2Cu4Bi(VO4)4(OH)3•8(H2O) Unk Ortho
08.BH.40 Pyrobelonite PbMn(VO4)(OH) Pnam 2/m 2/m 2/m
08.BH.40 Mottramite PbCu(VO4)(OH) Pnam 2/m 2/m 2/m

Other Mottramite Information

Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Sinkankas66)
Help on See Also: See Also: Links to other databases for Mottramite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Glendale Community College
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
18 - YupRocks

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Dana No: Strunz No: 08.BH.40





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