Minium Mineral Data

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General Minium Information

Chemical Formula:

Pb++2Pb++++O4

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

Empirical Formula:

Pb₂PbO₄

Environment:

Oxidized portions of lead ore deposits.

IMA Status:

Valid Species (Pre-IMA) Prehistoric

Locality:

The river Minius located in NW Spain. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Minium

Synonym:

ICSD 22325

PDF 41-1494

Red oxide of lead

Minium Image

Images:

Minium

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

Axial Ratios:

a:c = 1:0.74475

Cell Dimensions:

a = 8.815, c = 6.565, Z = 4; V = 510.13 Den(Calc)= 8.93

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4₁/mbc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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Dinnebier R E , Carlson S , Hanfland M , Jansen M , American Mineralogist , 88 (2003) p.996-1002, Bulk modulus and high-pressure crystal structures of minium, Pb3O4,, determined by X-ray powder diffraction, Sample: Phase III of Pb3O4 at 13.3 GPa

Physical Properties of Minium

Cleavage:

{110} Perfect, {010} Perfect

Color:

Light red, Brownish red, Vivid red, Yellowish red.

Density:

8.2

Diaphaneity:

Subtransparent to opaque

Fracture:

Earthy - Dull, clay-like fractures with no visible crystalline affinities, (e.g. howlite).

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Scaly - Morphology like fish scales.

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Hardness:

2.5-3 - Finger Nail-Calcite

Luminescence:

Non-fluorescent.

Luster:

Adamantine

Magnetism:

Nonmagnetic

Streak:

yellowish orange

Optical Properties of Minium

Dichroism (w):

nearly colorless.

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

Optical Data:

Uniaxial (?), a=2.4.

Calculated Properties of Minium

Electron Density:

Bulk Density (Electron Density)=7.24 gm/cc
note: Specific Gravity of Minium =8.93 gm/cc.

Fermion Index:

Fermion Index = 0.2
Boson Index = 0.8

Photoelectric:

PE_Minium=1,716.22 barns/electron
U=PE_Minium x rElectron Density=12428.83 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Minium is Not Radioactive

Minium Classification

Dana Class:

07.02.08.01 (07)Multiple Oxides

(07.02)(A+ B++)2 X4 Spinel group

(07.02.08)Dana Group

07.02.08.01 Minium Pb2PbO4 P 4₁/mbc 4/m 2/m 2/m

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

References:

NAME( Duda&Rejl90) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)

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
16 - WWW-MINCRYST

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Ask about Minium here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Minium Specimen Label here :

Minium

Pb++2Pb++++O4
Dana No: 07.02.08.01 Strunz No: 04.BD.05
Locality:

Notes: