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Minium Mineral Data

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General Minium Information

Help on Chemical  Formula: Chemical Formula: Pb++2Pb++++O4
Help on Composition: Composition: Molecular Weight = 685.60 gm
   Lead    90.67 %  Pb   65.11 % PbO / 34.89 % PbO2
   Oxygen   9.33 %  O
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2PbO4
Help on Environment: Environment: Oxidized portions of lead ore deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) Prehistoric
Help on Locality: Locality: The river Minius located in NW Spain. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Minium Say MINIUM
Help on Synonym: Synonym: ICSD 22325
  PDF 41-1494
  Red oxide of lead

Minium Image

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Comments: Bright orange minium with curved, conchoidal surfaces.
Location: Santa Fé Mine, Bolaños, Mun. de Bolaños, Jalisco, Mexico. Scale: 33x22x14 mm.
© John Betts - Fine Minerals

Minium Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.74475
Help on Cell Dimensions: Cell Dimensions: a = 8.815, c = 6.565, Z = 4; V = 510.13 Den(Calc)= 8.93
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 41/mbc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.38(1), 2.903(0.5), 2.787(0.45),1.76(0.3), 2.63(0.3), 1.91(0.2), 3.12(0.2), 6.23(0.2),

Physical Properties of Minium

Help on Cleavage: Cleavage: {110} Perfect, {010} Perfect
Help on Color: Color: Light red, Brownish red, Vivid red, Yellowish red.
Help on Density: Density: 8.2
Help on Diaphaneity: Diaphaneity: Subtransparent to opaque
Help on Fracture: Fracture: Earthy - Dull, clay-like fractures with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: yellowish orange

Optical Properties of Minium

Help on Dichroism (w): Dichroism (w): nearly colorless.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.385 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.272 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1568,KPDmeas= 0.1707,KC= 0.1232
Ncalc = 2.01 - 2.1
Help on Optical Data: Optical Data: Uniaxial (?), a=2.4.

Calculated Properties of Minium

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.24 gm/cc
note: Specific Gravity of Minium =8.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.2
Boson Index = 0.8
Help on Photoelectric: Photoelectric: PEMinium =1,716.22 barns/electron
U=PEMinium x rElectron Density=12428.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Minium is Not Radioactive

Minium Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.02)(A+ B++)2 X4 Spinel group
  (07.02.08)Dana Group Minium Pb2PbO4 P 41/mbc 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.BD.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.B - Metal:Oxygen = 3:4 and similar
  04.BD -With only large cations
04.BD.05 Minium Pb2PbO4 P 41/mbc 4/m 2/m 2/m

Other Minium Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Minium :
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 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 04.BD.05





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