Chloroxiphite Mineral Data

Chloroxiphite Mineral Data

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General Chloroxiphite Information

Chemical Formula:

Pb3CuCl2(OH)2O2

Composition:

Molecular Weight = 822.06 gm

Copper 7.73 % Cu 9.68 % CuO

Hydrogen 0.25 % H 2.19 % H₂O

Lead 75.61 % Pb 81.45 % PbO

Chlorine 8.63 % Cl 8.63 % Cl

- % Cl -1.95 % -O=Cl₂

Oxygen 7.78 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₃CuCl₂(OH)₂O₂

IMA Status:

Valid Species (Pre-IMA) 1923

Locality:

Higher Pitts, Mendip Hills, Somersetshire, England. Link to MinDat.org Location Data.

Synonym:

ICSD 200123

PDF 33-467

Chloroxiphite Image

Images:

Click Here for Larger Chloroxiphite Image

Chloroxiphite Mendipite Crednerite

Comments: Green, opaque granular chloroxiphite with mendipite and black crednerite.
Location: Higher Pitts Farm, Priddy, Mendip Hills, Somerset, England. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Chloroxiphite Mendipite Crednerite

Comments: Radiating compact with clear to white crystalline mendipite with black crednerite and green chloroxiphite.
Location: Mendip Hills, Somerset, England. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Chloroxiphite Crystallography

Axial Ratios:

a:b:c =1.8187:1:1.1639

Cell Dimensions:

a = 10.458, b = 5.75, c = 6.693, Z = 2; beta = 97.79° V = 398.76 Den(Calc)= 6.85

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 2.872(1), 2.829(0.78), 10.361(0.69),

Crystal Structure:

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Finney J J , Graeber E J , Rosenzweig A , Hamilton R D , Mineralogical Magazine , 41 (1977) p.357-361, The structure of chloroxiphite, Pb3CuO2(OH)2Cl2, Locality: Mendip Hills, Somerset, England

Physical Properties of Chloroxiphite

Cleavage:

[001] Perfect, [010] Distinct

Color:

Dull olive green, Pistachio green.

Density:

6.76

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2.5 - Finger Nail

Luster:

Adamantine - Resinous

Streak:

light yellow green

Optical Properties of Chloroxiphite

Gladstone-Dale:

CI meas= -0.128 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.114 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1776,KPDmeas= 0.18,KC= 0.1595

Optical Data:

Biaxial (-), a=2.16, b=2.24, g=2.25, bire=0.0900, 2V(Calc)=36, 2V(Meas)=70.

Pleochroism (x):

bright emerald green.

Pleochroism (y):

yellowish brown.

Calculated Properties of Chloroxiphite

Electron Density:

r_electron=5.72 gm/cc
note: r_{Chloroxiphite}=6.85 gm/cc.

Fermion Index

Fermion Index = 0.16714
Boson Index = 0.83286

Photoelectric:

PE_{Chloroxiphite}=1,395.54 barns/electron
U=PE_{Chloroxiphite} x r_electron=7,977.23 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chloroxiphite is Not Radioactive

Chloroxiphite Classification

Dana Class:

10.6.4.1 (10)Oxyhalides and Hydroxyhalides

(10.6)where Am Bn (O,OH)p Xq

(10.6.4)Dana Group

10.6.4.1 Chloroxiphite Pb3CuCl2(OH)2O2 P 2₁/m 2/m

Strunz Class:

III/D.12-60 III - Halogenides

III/D - Oxi-halogenides with Pb - Bi - Sb and related compounds

III/D.12 - Boleite - Yedlinite series

III/D.12-10 Boleite KPb26Ag9Cu24Cl62(OH)48 P m3m 4/m 3 2/m

III/D.12-20 Pseudoboleite Pb5Cu4Cl10(OH)8·2(H2O) I 4/mmm 4/m 2/m 2/m

III/D.12-40 Cumengite Pb21Cu20Cl42(OH)40 I 4/mmm 4/m 2/m 2/m

III/D.12-50 Diaboleite Pb2CuCl2(OH)4 P 4mm 4mm

III/D.12-60 Chloroxiphite Pb3CuCl2(OH)2O2 P 2₁/m 2/m

III/D.12-70 Hematophanite Pb4Fe3O8(OH,Cl) P 4mm 4mm

III/D.12-80 Bideauxite Pb2AgCl3(F,OH)2 F d3m 4/m 3 2/m

III/D.12-90 Yedlinite Pb6CrCl6(O,OH)8 R 3 3

Other Chloroxiphite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Chloroxiphite :
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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Chloroxiphite

Pb3CuCl2(OH)2O2
Dana No: 10.6.4.1 Strunz No: III/D.12-60
Locality:

Notes: