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Mendipite

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About MendipiteHide

Formula:
Pb3Cl2O2
Colour:
Colourless, white, grey, often tinged yellow, blue, red; nearly colourless in transmitted light
Lustre:
Adamantine, Resinous, Silky, Pearly
Hardness:
2½ - 3
Specific Gravity:
7.24
Crystal System:
Orthorhombic
Name:
After the type locality at the Mendip Hills, Somerset, England, UK.
Chemically similar to damaraite. Compare UM1990-25-O:ClPbS.


Classification of MendipiteHide

Approved, 'Grandfathered' (first described prior to 1959)
3.DC.70

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
10.3.1.1

10 : OXYHALIDES AND HYDROXYHALIDES
3 : A3(O,OH)2Xq
8.8.5

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

Physical Properties of MendipiteHide

Adamantine, Resinous, Silky, Pearly
Transparency:
Transparent, Translucent
Colour:
Colourless, white, grey, often tinged yellow, blue, red; nearly colourless in transmitted light
Streak:
White
Hardness:
2½ - 3 on Mohs scale
Cleavage:
Perfect
On {110} perfect; {100} and {010} less perfect.
Fracture:
Irregular/Uneven, Conchoidal
Density:
7.24 g/cm3 (Measured)    7.22 g/cm3 (Calculated)

Optical Data of MendipiteHide

Type:
Biaxial (+/-)
RI values:
nα = 2.240 nβ = 2.270 nγ = 2.310
2V:
Measured: 90° , Calculated: 84°
Max Birefringence:
δ = 0.070
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
relatively strong

Chemical Properties of MendipiteHide

Formula:
Pb3Cl2O2
IMA Formula:
Pb3O2Cl2

Crystallography of MendipiteHide

Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
P21 21 21
Cell Parameters:
a = 9.52 Å, b = 11.87 Å, c = 5.87 Å
Ratio:
a:b:c = 0.802 : 1 : 0.495
Unit Cell V:
663.32 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Fibrous or columnar masses, often radiated.

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
7.40 Å(6)
3.78 Å(6)
3.51 Å(7)
3.08 Å(6)
3.04 Å(8)
2.78 Å(10)
2.64 Å(9)

Type Occurrence of MendipiteHide

Synonyms of MendipiteHide

Other Language Names for MendipiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
33 photos of Mendipite associated with ChloroxiphitePb3CuO2Cl2(OH)2
15 photos of Mendipite associated with MereheaditePb47Cl25(OH)13O24(CO3)(BO3)2
12 photos of Mendipite associated with DiaboleitePb2CuCl2(OH)4
11 photos of Mendipite associated with CredneriteCuMnO2
9 photos of Mendipite associated with ParkinsonitePb7MoO9Cl2
7 photos of Mendipite associated with ParalaurionitePbCl(OH)
4 photos of Mendipite associated with Plumboan Aragonite(Ca,Pb)CO3
4 photos of Mendipite associated with CalciteCaCO3
4 photos of Mendipite associated with CerussitePbCO3
2 photos of Mendipite associated with HydrocerussitePb3(CO3)2(OH)2

Related Minerals - Nickel-Strunz GroupingHide

3.DC.05LaurionitePbCl(OH)Orth. mmm (2/m 2/m 2/m)
3.DC.05ParalaurionitePbCl(OH)Mon. 2/m : B2/m
3.DC.10FiedleritePb3FCl4(OH) · H2OMon. 2/m
3.DC.15PenfielditePb2Cl3(OH)Hex. 6 : P6
3.DC.20LaurelitePb7F12Cl2Hex. 6 : P6
3.DC.25BismocliteBiOClTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
3.DC.25Daubréeite(BiO)(OH,Cl)Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
3.DC.25MatlockitePbFClTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
3.DC.25RorisiteCaFClTet.
3.DC.25Zavaritskite(BiO)FTet.
3.DC.25ZhangpeishaniteBaFClTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
3.DC.30NadoritePbSbClO2Orth. mmm (2/m 2/m 2/m) : Cmcm
3.DC.30PeritePbBiClO2Orth. mmm (2/m 2/m 2/m) : Cmcm
3.DC.35AravaipaitePb3AlF9 · H2OTric.
3.DC.37CalcioaravaipaitePbCa2AlF9Tric. 1
3.DC.40ThorikositePb3Cl2(OH)(SbO3,AsO3)Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.DC.45MereheaditePb47Cl25(OH)13O24(CO3)(BO3)2Mon. m
3.DC.50BlixitePb8O5(OH)2Cl4Orth.
3.DC.55PinalitePb3WO5Cl2Orth.
3.DC.60SymesitePb10(SO4)O7Cl4 · H2OTric. 1 : P1
3.DC.65EcdemitePb6Cl4(As2O7)Mon. 2 : P21
3.DC.65HeliophyllitePb6Cl4(As2O7)Orth.
3.DC.75DamaraitePb3Cl(OH)O2Orth. mm2 : Pmc21
3.DC.80OnoratoiteSb8Cl2O11Tric. 1 : P1
3.DC.85CotunnitePbCl2Orth. mmm (2/m 2/m 2/m)
3.DC.90PseudocotunniteK2PbCl4Orth.
3.DC.95BarstowitePb4Cl6(CO3) · H2OMon. 2/m : P21/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.8.1AbhuriteSn21Cl16(OH)14O6Trig.
8.8.2MatlockitePbFClTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.8.3LaurelitePb7F12Cl2Hex. 6 : P6
8.8.4CotunnitePbCl2Orth. mmm (2/m 2/m 2/m)
8.8.6DamaraitePb3Cl(OH)O2Orth. mm2 : Pmc21
8.8.7LaurionitePbCl(OH)Orth. mmm (2/m 2/m 2/m)
8.8.8ParalaurionitePbCl(OH)Mon. 2/m : B2/m
8.8.9PenfielditePb2Cl3(OH)Hex. 6 : P6
8.8.10FiedleritePb3FCl4(OH) · H2OMon. 2/m
8.8.11BlixitePb8O5(OH)2Cl4Orth.
8.8.12PseudocotunniteK2PbCl4Orth.
8.8.13DiaboleitePb2CuCl2(OH)4Tet. 4mm : P4mm
8.8.14PseudoboleitePb31Cu24Cl62(OH)48Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.8.15ChloroxiphitePb3CuO2Cl2(OH)2Mon. 2/m : P21/m
8.8.17BideauxitePb2AgCl3(F,OH)2Iso. m3m (4/m 3 2/m) : Fd3m
8.8.18BoleiteKPb26Ag9Cu24(OH)48Cl62Iso. m3m (4/m 3 2/m) : Pm3m
8.8.19AravaipaitePb3AlF9 · H2OTric.
8.8.20YedlinitePb6Cr3+Cl6(O,OH,H2O)8Trig. 3 : R3
8.8.21KolaritePbTeCl2Orth.
8.8.22HematophanitePb4Fe3O8(OH,Cl)Tet. 4/mmm (4/m 2/m 2/m)

Other InformationHide

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

References for MendipiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Berzelius (1823) Svenska Vetenskapsakademien, Stockholm, Handlingar: 184.
Berzelius (1824) Edinburgh Journal of Science: 1: 379.
Haidinger (1825) Mohs: 2: 151.
Beudant, F.S. (1832) Traité élémentaire de Minéralogie, second edition, 2 volumes: 2: 502.
Breithaupt, A. (1832) Vollständige Characteristik etc. 2nd. Ed.: 61 (as Chlor-Spath).
Lévy, A. (1837) Description d’une collection de minéraux formée par M. Henri Heuland, et appartenant à M. Ch. H. Turner, de Rooksnest, dans le comté de Surrey en Angleterre. 3 volumes and atlas of 85 plates, London: 2: 448 (as Berzélite).
Glocker, E.F. (1839) Handbuch der Mineralogie, 2nd. edition, Nürnberg.: 604.
Dufrénoy (1856) 3: 280.
Rimann (1918) Anal. soc. quim. argentina: 6: 326 (as Pseudomendipite).
Spencer (1923) Mineralogical Magazine: 20: 67.
Bannister (1934) Mineralogical Magazine: 23: 596.
Palache, Charles, Harry Berman & Clifford Frondel (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: 56-58.
Gabrielson, O. (1958) The crystal structure of mendipite, Pb3O2Cl2. Arkiv Mineral. Geol., 2(16), 299–304.
Arkiv för Mineralogi och Geologi (1969) 4: 523.
Vincent, H. and Perrault, G. (1971) Structure cristalline de l’oxychlorure de plomb synthétique Pb3O2Cl2. Bulletin de la Société française de Minéralogie et de Cristallographie 94, 323–331.
Symes, R.F. and Embrey, P.G. (1977) Mendipite and other rare oxychloride minerals from the Mendip Hills, Somerset, England. Mineral. Record, 8, 298–303.
Neues Jahrbuch für Mineralogie, Monatshefte (2000) 563-569.
Krivovichev, Sergey V.; Burns, Peter C. (2001) Crystal chemistry of lead oxide chlorides. I. Crystal structures of synthetic mendipite, Pb3O2Cl2, and synthetic damaraite, Pb3O2(OH)Cl. Eur. J. Mineral. 13, 801-809.

Internet Links for MendipiteHide

Localities for MendipiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Asia
 
Pilipenko, P. P. (1915): Mineralogy of the Western Altai. Bull. Imp. Tomsk University, Tomsk, no. 63.
Australia
 
  • New South Wales
    • Robinson Co.
      • Cobar
Scott, K. M. (1994): Lead oxychlorides at Elura, western NSW, Australia. Mineralogical Magazine 58, 336-338.; Chapman, J. & Scott, K. (2005): Supergene minerals from the oxidised zone of the Elura (Endeavor) lead-zinc-silver deposit. Australian Journal of Mineralogy, 11, 83-90. ; Loidl, Gernot C. (2012) The Elura Orebody: a multidisciplinary study investigating geochemical mineralogical & geometallurgical ore characteristics. PhD thesis Adelaide University; Leverett, P., McKinnon, A. R., & Williams, P. A. (2005). Supergene geochemistry of the Endeavor ore body, Cobar, NSW, and relationships to other deposits in the Cobar basin. Regolith 2005–Ten Years of CRC LEME, 191-194.
  • South Australia
    • Mt Lofty Ranges
      • South Mt Lofty Ranges (Adelaide Hills)
        • Chandlers Hill
Bywater, S. (1987): Minerals from the Mount Malvern mine. Mineralogical News (Journal of the Mineralogical Society of South Australia), 7 (1), 41.; Kolitsch, U. and Elliott, P. (1999): Mineralogy of the Mount Malvern Mine near Clarendon, South Australia. Australian J. Mineral. 5, 3-17.
Germany
 
  • North Rhine-Westphalia
    • Arnsberg
      • Hochsauerlandkreis
        • Brilon
Rhodius, R. (1847): Justus Liebig's Annalen der Chemie und Pharmacie 62, 373, Naumann, Zirkel: "Elemente der Mineralogie", 13th Ed., Engelmann (Leipzig), 1898; 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.
    • The Ruhr
      • Marl
        • Marl-Hüls
Weiss, S. (1990) Mineralfundstellen Atlas, Deutschland West. Weise Verlag, München, 320 pages.
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
Schnorrer-Köhler, G. (1980): Mendipit Pb3Cl2O2 - Neufund für Lavrion, Griechenland. Der Aufschluss, 31 (5), 153-155.
          • Passa Limani area
Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals of the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
          • Sounion area
Laurion The mineralsin the ancient slags by Piet Gelaude etc.
          • Thorikos area
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
Sweden
 
  • Värmland County
    • Filipstad
Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
UK
 
  • England
    • Bristol
      • Westbury on Trym
BMS Database
    • Cornwall
      • Crantock
BMS Newsletter 79, March 2010 (http://britishmicromountsociety.homestead.com/Gannell-Smelter.html)
    • Somerset
      • Mendip
Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; 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.
        • Cranmore
Symes, R.F. (1977) Datolite and apophyllite from the Mendips. Mineralogical Magazine: 41 (319): 410-411.; Jambor, J.L., Pertsev, N.N., and Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 1195-1198.; Turner, R.W. (2006) A mechanism for the formation of the mineralised Mn deposits at Merehead Quarry, Cranmore, Somerset, England. Mineralogical Magazine: 70(6): 629-653.; Turner, R.W. and Rumsey, M.S. (2010) Mineral relationships in the Mendip Hills. Journal of the Russell Society: 13: 3-46.
        • Nunney
BMS Database
        • 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: 57; Mineralogical Record: 27: 253.
USA
 
  • Massachusetts
    • Hampshire Co.
      • Easthampton
Gleba, 1978. Massachusetts Mineral & Fossil Localities
  • Pennsylvania
    • Chester Co.
      • Schuylkill Township
MinRec 20:369-386
 
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