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

Environment:

Secondary mineral associated with lead- and copper-bearing pods in Mn-Fe deposits developed along fissures in dolomitic conglomerate and limestone.

IMA Status:

Valid Species (Pre-IMA) 1923

Locality:

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

Name Origin:

Named fom the Greek for green and blade or straight sword, for the typical crystal habit.

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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drag2 - RMB Resize/Rotate
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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

Diaphaneity:

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
Ncalc = 2.08 - 2.09

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:

Bulk Density (Electron Density)=5.72 gm/cc
note: Specific Gravity of Chloroxiphite =6.85 gm/cc.

Fermion Index:

Fermion Index = 0.16
Boson Index = 0.84

Photoelectric:

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

Radioactivity:

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

Chloroxiphite Classification

Dana Class:

10.06.04.01 (10)Oxyhalides and Hydroxyhalides

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

(10.06.04)Dana Group

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

Strunz Class:

03.DB.30 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DB -With Pb, Cu, etc.

03.DB.30 Chloroxiphite Pb3CuCl2(OH)2O2 P 2₁/m 2/m

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 - 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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Ask about Chloroxiphite 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 Chloroxiphite Specimen Label here :

Chloroxiphite

Pb3CuCl2(OH)2O2
Dana No: 10.06.04.01 Strunz No: 03.DB.30
Locality:

Notes: