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Chloroxiphite

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Torr Works Quarry (Merehead Quarry), Cranmore, Somerset, England, UK
© Peter Haas

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Formula:
Pb
 
3
CuO
 
2
Cl
 
2
(OH)
 
2
System:MonoclinicColour:Dull olive green
Lustre:Adamantine, ResinousHardness:2½
Name:From the Greek χλωρός, green and ζιφος, a blade or sword, in allusion to its color and crystal habit.
This page provides mineralogical data about Chloroxiphite.

Classification of Chloroxiphite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:3/D.12-60
Nickel-Strunz 10th (pending) edition ID:3.DB.30

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
B : With Pb, Cu, etc.
Dana 8th edition ID:10.6.4.1

10 : OXYHALIDES AND HYDROXYHALIDES
6 : AmBn(O,OH)pXq
Hey's CIM Ref.:8.8.15

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
8 : Halides of Pb
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Type Occurrence of Chloroxiphite

Type Locality:Higher Pitts Mine, Priddy, Somerset, England, UK
Year of Discovery:1923
Associated Minerals at type locality:
MendipiteDiaboleite

Physical Properties of Chloroxiphite

Lustre:Adamantine, Resinous
Colour:Dull olive green
Streak:Light green yellow
Hardness (Mohs):2½
Tenacity:Very brittle
Cleavage:Perfect
On {_101} perfect; {100} distinct.
Density (measured):6.76 - 6.93 g/cm3
Density (calculated):7.07 g/cm3

Crystallography of Chloroxiphite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/m {P1 1 21/m} {P21/m} {P1 21/m 1}
Cell Parameters:a = 6.6972(8) Å, b = 5.7538(5) Å, c = 10.4686(14) Å
β = 97.747(10)°
Ratio:a:b:c = 1.164 : 1 : 1.819
Unit Cell Volume:V 399.72 ų
Morphology:Crystals bladed, elongated [010] and flattened {_101}. Subparallel groups. {_101} roughly striated [010].

Optical Data of Chloroxiphite

Type:Biaxial (-)
RI values: nα = 2.160 nβ = 2.240 nγ = 2.250
2V:Measured: 70° , Calculated: 36°
Maximum Birefringence:δ = 0.090

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:extreme
Pleochroism:Visible
Comments:X ≈ perpendicular to {_101}
Y = brown
Z = b = green

Chemical Properties of Chloroxiphite

Formula:
Pb
 
3
CuO
 
2
Cl
 
2
(OH)
 
2
Essential elements:Cl, Cu, H, O, Pb
All elements listed in formula:Cl, Cu, H, O, Pb

Relationship of Chloroxiphite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.DB.05Diaboleite
Pb
 
2
CuCl
 
2
(OH)
 
4
3.DB.10Pseudoboleite
Pb
 
31
Cu
 
24
Cl
 
62
(OH)
 
48
3.DB.15Boleite
KPb
 
26
Ag
 
9
Cu
 
24
(OH)
 
48
Cl
 
62
3.DB.20Cumengeite
Pb
 
21
Cu
 
20
Cl
 
42
(OH)
 
40
·6H
 
2
O
3.DB.25Bideauxite
Pb
 
2
Ag[(F,OH)
 
2
|Cl
 
3
]
3.DB.35Hematophanite
Pb
 
4
Fe
 
3
O
 
8
(OH,Cl)
3.DB.40Asisite
Pb
 
7
[O
 
4
|SiO
 
4
|Cl
 
2
]
3.DB.40Parkinsonite
(Pb,Mo,[])
 
8
O
 
8
Cl
 
2
3.DB.45Murdochite
PbCu
 
6
O
 
8-x
(Cl,Br)
 
2x
 x<=0.5
3.DB.50Yedlinite
Pb
 
6
(Cl,OH)
 
6
Cr
3+
 
(OH,O)
 
8
Related Minerals - Hey's Index Grouping:

- +
8.8.1Abhurite
Sn
 
21
Cl
 
16
(OH)
 
14
O
 
6
8.8.2Matlockite
PbFCl
8.8.3Laurelite
Pb(F,Cl,OH)
 
2
8.8.4Cotunnite
PbCl
 
2
8.8.5Mendipite
Pb
 
3
[O
 
2
|Cl
 
2
]
8.8.6Damaraite
Pb
 
3
[O
 
2
|OH|Cl]
8.8.7Laurionite
PbClOH
8.8.8Paralaurionite
PbClOH
8.8.9Penfieldite
Pb
 
2
[OH|Cl
 
3
]
8.8.10Fiedlerite
Pb
 
3
Cl
 
4
F(OH)·H
 
2
O
8.8.11Blixite
Pb
 
2
[(O,OH)
 
2
|Cl]
8.8.12Pseudocotunnite
K
 
2
PbCl
 
4
8.8.13Diaboleite
Pb
 
2
CuCl
 
2
(OH)
 
4
8.8.14Pseudoboleite
Pb
 
31
Cu
 
24
Cl
 
62
(OH)
 
48
8.8.17Bideauxite
Pb
 
2
Ag[(F,OH)
 
2
|Cl
 
3
]
8.8.18Boleite
KPb
 
26
Ag
 
9
Cu
 
24
(OH)
 
48
Cl
 
62
8.8.19Aravaipaite
Pb
 
3
[F
 
3
|AlF
 
6
] · H
 
2
O
8.8.20Yedlinite
Pb
 
6
(Cl,OH)
 
6
Cr
3+
 
(OH,O)
 
8
8.8.21Kolarite
PbTeCl
 
2
8.8.22Hematophanite
Pb
 
4
Fe
 
3
O
 
8
(OH,Cl)

Other Names for Chloroxiphite

Synonyms:
Chloro-ziphite
Other Languages:
German:Chloroxiphit
Russian:Хлороксифит
Spanish:Chloroxiphita

Other Information

Other Information:Soluble in nitric acid.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Chloroxiphite

Reference List:Spencer (1923) Mineralogical Magazine: 20: 76.

American Mineralogist (1924): 9: 96.

Palache, C., Berman, H. & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged

Mineralogical Magazine: 41: 357-361.

Slidra, O.I., S.V.Krivivichev, R.W. Turner, & M.S. Rumsey (2008). Chloroxiphite Pb3CuO2(OH)2Cl2: structure refinement and description in terms of oxocentred OPb4 tetrahedra. Mineralogical Magazine 72(3), 793-798(2008)

Internet Links for Chloroxiphite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Chloroxiphite in the Natural History Museum (London) online catalogue
  • Chloroxiphite details from Handbook of Mineralogy (PDF)
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    Localities for Chloroxiphite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    China
     
    • Xinjiang (Xinjiang-Uygur) Autonomous Region
      • Hami (Kumul; Qumul) Prefecture
        • Hami (Kumul; Qumul) Co.
    		http://pubs.usgs.gov/of/2005/1060/PorCu.txt
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
    		Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian, Laurion: The Minerals in the Ancient Slags
    UK
     
    • England
      • Somerset
        • Cranmore
    		Turner, R.W., (2006) A Mechanism for the formation of the Mineralised Mn Deposits at Merehead Quarry, Cranmore, Somerset, England. Min. Mag. vol. 70, no. 6, pp 629 - 653; Mineralogical Magazine 1977 41 : 410-411
        • Holwell
    		BMS Database
        • Mendip Hills
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 57.
        • Priddy
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 83, 85; Mineralogical Magazine (1923): 20, 67-92 (the mineral 75-77); Clark, 1993 - "Hey's Mineral Index"] [MinRec 27:253]
        • Westbury on Trym
    		BMS Database
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 22nd Oct 2009 21:06:12