Veenite Mineral Data

General Veenite Information

Chemical Formula:

Pb2(Sb,As)2S5

Composition:

Molecular Weight = 776.08 gm

Antimony 17.26 % Sb

Arsenic 8.69 % As

Lead 53.40 % Pb

Sulfur 20.66 % S

______

100.00 %

Empirical Formula:

Pb₂Sb_1.1As_0.9S₅

Environment:

As small masses, stringers, and disseminated grains in marbles developed in a sequence of Precambrian metasediments near a contact with plutonic granitic gneiss.

IMA Status:

Approved IMA 1967

Locality:

Madoc, Ontario, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for R. W. Van der Veen (1883-1925), Dutch economic geologist and metallographer.

Name Pronunciation:

Veenite

Synonym:

IMA1966-016

Veenite Crystallography

Axial Ratios:

a:b:c =0.161:1:0.3015

Cell Dimensions:

a = 4.22, b = 26.2, c = 7.9, Z = 4; V = 873.46 Den(Calc)= 5.90

Crystal System:

Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P 2₁cn

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

By Intensity(I/I_o): 3.81(1), 3.03(0.9), 3.42(0.8),

Physical Properties of Veenite

Cleavage:

None

Color:

Steel gray.

Density:

5.92

Diaphaneity:

Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Streak:

black

Optical Properties of Veenite

RL Anisotrophism:

Weak, white to pale pinkish brown.

RL Color:

White.

RL Pleochroism:

Moderate.

Calculated Properties of Veenite

Electron Density:

Bulk Density (Electron Density)=5.01 gm/cc
note: Specific Gravity of Veenite =5.90 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Veenite=1,032.01 barns/electron
U=PE_Veenite x rElectron Density=5,174.96 barns/cc.

Radioactivity:

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

Veenite Classification

Dana Class:

03.05.09.02 (03)Sulfides - Sulfosalts

(03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.05.09)Cosalite Group

03.05.09.01 Cosalite Pb2Bi2S5 Pbnm 2/m 2/m 2/m

03.05.09.02 Veenite Pb2(Sb,As)2S5 P 2₁cn mm2

03.05.09.03 Dufrenoysite Pb2As2S5 P 2₁/m 2/m

Strunz Class:

02.HC.05d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.H - Sulfosalts of SnS Archetype

02.HC -With only Pb

02.HC.05d Dufrenoysite Pb2As2S5 P 2₁/m 2/m

02.HC.05d Rathite Pb8Pb4-x(Tl2As2)x(Ag2As2)As16S40 P 2₁/n 2/m

02.HC.05d Veenite Pb2(Sb,As)2S5 P 2₁cn mm2

Other Veenite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Veenite :
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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Print or Cut-and-Paste your Veenite Specimen Label here :

Veenite

Pb2(Sb,As)2S5
Dana No: 03.05.09.02 Strunz No: 02.HC.05d
Locality:

Notes:

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