Chenite Mineral Data

General Chenite Information

Chemical Formula:

Pb4Cu(SO4)2(OH)6

Composition:

Molecular Weight = 1,186.52 gm

Copper 5.36 % Cu 6.70 % CuO

Hydrogen 0.51 % H 4.55 % H₂O

Lead 69.85 % Pb 75.25 % PbO

Sulfur 5.41 % S 13.50 % SO₃

Oxygen 18.88 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₄Cu(SO₄)₂(OH)₆

Environment:

On partially oxidized galena and chalcopyrite.

IMA Status:

Approved IMA 1986

Locality:

Susanna mine, Leadhills, Scotland. Link to MinDat.org Location Data.

Name Origin:

Named for Tzong T. Chen (1942-), Canadian mineralogist.

Synonym:

ICSD 63253

IMA1983-069

PDF 39-350

Chenite Image

Images:

Chenite

Comments: Sky blue crystalline coating of chenite on matrix.
Location: Silberhutte, Altenau, Harz Mountains, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Chenite Crystallography

Axial Ratios:

a:b:c =0.7293:1:1.0045

Cell Dimensions:

a = 5.791, b = 7.94, c = 7.976, Z = 1; alpha = 112.02°, beta = 97.73°, gamma = 100.45° V = 331.31 Den(Calc)= 5.95

Crystal System:

Triclinic - Pedial H-M Symbol (1) Space Group: P1

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

By Intensity(I/I_o): 3.6(1), 3.41(0.9), 5.55(0.7),

Physical Properties of Chenite

Cleavage:

{100} Good, {001} Indistinct

Color:

Sky blue.

Density:

5.98

Diaphaneity:

Transparent to Translucent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

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

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Resinous

Streak:

pale blue

Optical Properties of Chenite

Gladstone-Dale:

CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1494,KPDmeas= 0.1509,KC= 0.1508
Ncalc = 1.9 - 1.91

Optical Data:

Biaxial (-), a=1.871, b=1.909, g=1.927, bire=0.0560, 2V(Calc)=66, 2V(Meas)=67. Dispersion very strong, r > v.

Calculated Properties of Chenite

Electron Density:

Bulk Density (Electron Density)=5.11 gm/cc
note: Specific Gravity of Chenite =5.98 gm/cc.

Fermion Index:

Fermion Index = 0.15
Boson Index = 0.85

Photoelectric:

PE_Chenite=1,257.76 barns/electron
U=PE_Chenite x rElectron Density=6,427.80 barns/cc.

Radioactivity:

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

Chenite Classification

Dana Class:

30.01.16.01 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.01)where (A B)m (XO4)p Zq where m:p>2:1

(30.01.16)Dana Group

30.01.16.01 Chenite Pb4Cu(SO4)2(OH)6 P1 1

Strunz Class:

07.BC.70 07 - SULFATES (SELENATES, TELLURATES)

07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O

07.BC -With medium-sized and large cations

07.BC.70 Chenite Pb4Cu(SO4)2(OH)6 P1 1

Other Chenite Information

References:

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

See Also:

Links to other databases for Chenite :
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
15 - WWW-MINCRYST

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

Chenite

Pb4Cu(SO4)2(OH)6
Dana No: 30.01.16.01 Strunz No: 07.BC.70
Locality:

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