Mineralogy Database

Molybdomenite Mineral Data

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General Molybdomenite Information

Help on Chemical  Formula: Chemical Formula: PbSeO3
Help on Composition: Composition: Molecular Weight = 334.16 gm
   Lead      62.01 %  Pb   66.79 % PbO
   Selenium  23.63 %  Se   33.21 % SeO2
   Oxygen    14.36 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbSeO3
Help on Environment: Environment: Alteration product of clausthalite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1882
Help on Locality: Locality: Cerro de Cachueta, Mendoza, Argentina. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition of lead (Greek - molybdos) and selenium (Greek - mene "moon").
Help on Name Pronunciation: Name Pronunciation: Molybdomenite + Pronunciation Say MOLYBDOMENITE
Help on Synonym: Synonym: ICSD 9380
  Kerstenite - (of Dana) = molybdomenite
  PDF 15-462

Molybdomenite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2518:1:0.8211
Help on Cell Dimensions: Cell Dimensions: a = 6.86, b = 5.48, c = 4.5, Z = 2; beta = 112.7° V = 156.06 Den(Calc)= 7.11
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.756(1), 3.32(0.9), 3.43(0.7),

Physical Properties of Molybdomenite

Help on Cleavage: Cleavage: {001} Good, {h0l} Fair
Help on Color: Color: Colorless, Yellowish white.
Help on Density: Density: 7.07
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Molybdomenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1589,KPDmeas= 0.1598,KC= 0.1536
Ncalc = 2.09
Help on Optical Data: Optical Data: Biaxial (-), a=2.12, g=2.14, bire=0.0200, 2V(Meas)=80.

Calculated Properties of Molybdomenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.96 gm/cc
note: Specific Gravity of Molybdomenite =7.11 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PEMolybdomenite =1,155.81 barns/electron
U=PEMolybdomenite x rElectron Density=6,885.95 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Molybdomenite is Not Radioactive

Molybdomenite Classification

Help on  Dana Class: Dana Class: (34)Selenites - Tellurites - Sulfites
  (34.01)as A++ XO3
  (34.01.01)Dana Group Molybdomenite PbSeO3 P 21/m 2/m Scotlandite PbSO3 P 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.JF.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JF -Selenites without additional anions, without H2O
04.JF.05 Molybdomenite PbSeO3 P 21/m 2/m

Other Molybdomenite Information

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





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