Chenite Mineral Data

Chenite Mineral Data

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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 - PedialH-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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Hess H , Keller P , Riffel H , Neues Jahrbuch fur Mineralogie, Monatshefte , 1988 (1988) p.259-264, The crystal structure of chenite, Pb4Cu(OH)6(SO4)2, Locality: Leadhills, Scotland

Physical Properties of Chenite

Cleavage:

[100] Good, [001] Indistinct

Color:

Sky blue.

Density:

5.98

Diaphaniety:

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= -0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1517,KPDmeas= 0.1509,KC= 0.1508

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:

r_electron=5.11 gm/cc
note: r_Chenite=5.98 gm/cc.

Fermion Index

Fermion Index = 0.15486
Boson Index = 0.84514

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chenite is Not Radioactive

Chenite Classification

Dana Class:

30.1.16.1 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

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

(30.1.16)Dana Group

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

Strunz Class:

VI/B.10-30 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. cations of medium size

VI/B.10 - Linarite - Mammothite series

VI/B.10-10 Linarite PbCu(SO4)(OH)2 P 2₁/m 2/m

VI/B.10-20 Schmiederite Pb2Cu2(SeO3)(SeO4)(OH)4 P 2₁/m 2/m

VI/B.10-30 Chenite Pb4Cu(SO4)2(OH)6 P1 1

VI/B.10-40 Elyite Pb4Cu(SO4)O2(OH)4·(H2O) P 2₁/c 2/m

VI/B.10-50 Mammothite Pb6Cu4AlSbO2(SO4)2Cl4(OH)16 C 2/m 2/m

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Chenite

Pb4Cu(SO4)2(OH)6
Dana No: 30.1.16.1 Strunz No: VI/B.10-30
Locality:

Notes: