Mineralogy Database

Mathewrogersite Mineral Data

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General Mathewrogersite Information

Help on Chemical  Formula: Chemical Formula: Pb7(Fe,Cu)Al3GeSi12O36•(OH,H2O)6
Help on Composition: Composition: Molecular Weight = 2,678.79 gm
   Aluminum    3.02 %  Al    5.71 % Al2O3
   Iron        1.56 %  Fe    2.01 % FeO
   Copper      0.59 %  Cu    0.74 % CuO
   Silicon    12.58 %  Si   26.92 % SiO2
   Germanium   2.71 %  Ge    3.91 % GeO2
   Hydrogen    0.30 %  H     2.69 % H2O
   Lead       54.14 %  Pb   58.32 % PbO
   Oxygen     25.09 %  O
             ______        ______ 
             100.00 %      100.30 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb7Fe2+0.75Cu0.25Al3GeSi12O36(OH)4•2(H2O)
Help on Environment: Environment: Corroded Pb-Zn ores of the lower oxidation zone.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named to honor Mathew Rogers, first European prospector at Tsumeb, Namibia.
Help on Name Pronunciation: Name Pronunciation: Mathewrogersite + Pronunciation Say MATHEWROGERSITE

Mathewrogersite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:5.43573
Help on Cell Dimensions: Cell Dimensions: a = 8.457, c = 45.97, Z = 3; V = 2,847.33 Den(Calc)= 4.69
Help on Crystal System: Crystal System: Trigonal Space Group: R 3,R 3-,R 32,R 3m,R 3m-
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.257(1), 15.3(0.7), 2.03(0.7),1.762(0.6), 2.766(0.6), 7.68(0.6), 4.08(0.5),

Physical Properties of Mathewrogersite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Colorless, White, Light green yellow.
Help on Density: Density: 4.7
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Mathewrogersite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1658,KPDmeas= 0.1654,KC= 0.1661
Ncalc = 1.78
Help on Optical Data: Optical Data: Uniaxial (-), e=1.745, w=1.81, bire=0.0650.

Calculated Properties of Mathewrogersite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.14 gm/cc
note: Specific Gravity of Mathewrogersite =4.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.12
Boson Index = 0.88
Help on Photoelectric: Photoelectric: PEMathewrogersite = 943.67 barns/electron
U=PEMathewrogersite x rElectron Density=3,911.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mathewrogersite is Not Radioactive

Mathewrogersite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.03)possible cyclosilicates
  (78.03.01)Dana Group Mathewrogersite Pb7(Fe,Cu)Al3GeSi12O36•(OH,H2O)6 R 3,R 3-,R 32,R 3m,R 3m- Trig
Help on  Strunz Class: Strunz Class: 09.CJ.55 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CJ -[Si6O18]12- 6-membered single rings (sechser-Einfachringe),
09.CJ.55 Mathewrogersite Pb7(Fe,Cu)Al3GeSi12O36•(OH,H2O)6 R 3,R 3-,R 32,R 3m,R 3m- Trig

Other Mathewrogersite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.72,p1025,1987)
Help on See Also: See Also: Links to other databases for Mathewrogersite :
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: 09.CJ.55





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