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Matlockite

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Formula:
PbFCl
System:
Tetragonal
Colour:
Colourless, light yellow ...
Hardness:
2½ - 3
Name:
After the locality near Matlock, Derbyshire, England.
Matlockite Group.

An extremely rare secondary lead mineral.
May be confused with platy phosgenite.

Classification of Matlockite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
3.DC.25

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
9.2.11.1

9 : NORMAL HALIDES
2 : AX2
8.8.2

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
8 : Halides of Pb
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http://www.mindat.org/min-2593.html
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First Recorded Occurrence of Matlockite

Year of Discovery:
1851
Associated Minerals at First Recorded Locality:

Physical Properties of Matlockite

Adamantine, Pearly
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, light yellow to light golden-yellow, greenish
Hardness (Mohs):
2½ - 3
Cleavage:
Perfect
On {001}.
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
7.12 g/cm3 (Measured)    7.16 g/cm3 (Calculated)

Crystallography of Matlockite

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P4/nmm
Cell Parameters:
a = 4.11Å, c = 7.23Å
Ratio:
a:c = 1 : 1.759
Unit Cell Volume:
V 122.13 ų (Calculated from Unit Cell)
Morphology:
Crystals usually tabular {001}; also as stout pyramidal crystals with smal prism faces. Subparallel aggregates of platy crystals; as hemispherical, rosette-like groups. Massive; coarsely lamellar.

Optical Data of Matlockite

Type:
Uniaxial (-)
RI values:
nω = 2.150 nε = 2.040
Max Birefringence:
δ = 0.110
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Comments:
Biaxial with small 2V at times, the result of subparallel growth or strain.

Chemical Properties of Matlockite

Formula:
PbFCl
Essential elements:
All elements listed in formula:

Relationship of Matlockite to other Species

Other Members of Group:
Bismoclite(BiO)Cl
Daubréeite(BiO)(OH,Cl)
LaurionitePbCl(OH)
ParalaurionitePbCl(OH)
RorisiteCaFCl
Zavaritskite(BiO)F
3.DC.05LaurionitePbCl(OH)
3.DC.05ParalaurionitePbCl(OH)
3.DC.10FiedleritePb3FCl4(OH) · H2O
3.DC.15PenfielditePb2Cl3(OH)
3.DC.20LaurelitePb7F12Cl2
3.DC.25Bismoclite(BiO)Cl
3.DC.25Daubréeite(BiO)(OH,Cl)
3.DC.25RorisiteCaFCl
3.DC.25Zavaritskite(BiO)F
3.DC.25ZhangpeishaniteBaFCl
3.DC.30NadoritePbSbClO2
3.DC.30PeritePbBiClO2
3.DC.35AravaipaitePb3F3[AlF6] · H2O
3.DC.37CalcioaravaipaitePbCa2AlF9
3.DC.40ThorikositePb3Cl2(OH)(SbO3,AsO3)
3.DC.45MereheaditePb47Cl25(OH)13O24(CO3)(BO3)2
3.DC.50BlixitePb2(O,OH)2Cl
3.DC.55PinalitePb3WO5Cl2
3.DC.60SymesitePb10(SO4)O7Cl4 · H2O
3.DC.65EcdemitePb6Cl4(As2O7)
3.DC.65HeliophyllitePb6Cl4(As2O7)
3.DC.70MendipitePb3Cl2O2
3.DC.75DamaraitePb3Cl(OH)O2
3.DC.80OnoratoiteSb8Cl2O11
3.DC.85CotunnitePbCl2
3.DC.90PseudocotunniteK2PbCl4
3.DC.95BarstowitePb4Cl6(CO3) · H2O
8.8.1AbhuriteSn21Cl16(OH)14O6
8.8.3LaurelitePb7F12Cl2
8.8.4CotunnitePbCl2
8.8.5MendipitePb3Cl2O2
8.8.6DamaraitePb3Cl(OH)O2
8.8.7LaurionitePbCl(OH)
8.8.8ParalaurionitePbCl(OH)
8.8.9PenfielditePb2Cl3(OH)
8.8.10FiedleritePb3FCl4(OH) · H2O
8.8.11BlixitePb2(O,OH)2Cl
8.8.12PseudocotunniteK2PbCl4
8.8.13DiaboleitePb2CuCl2(OH)4
8.8.14PseudoboleitePb31Cu24Cl62(OH)48
8.8.15ChloroxiphitePb3CuO2Cl2(OH)2
8.8.17BideauxitePb2AgCl3(F,OH)2
8.8.18BoleiteKPb26Ag9Cu24(OH)48Cl62
8.8.19AravaipaitePb3F3[AlF6] · H2O
8.8.20YedlinitePb6Cr3+Cl6(O,OH,H2O)8
8.8.21KolaritePbTeCl2
8.8.22HematophanitePb4Fe3O8(OH,Cl)

Other Names for Matlockite

Name in Other Languages:

Other Information

Thermal Behaviour:
Melting point 601°.
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 Matlockite

Reference List:
Greg, R.P. (1851): A Description of Matlockite, a New Oxychloride of Lead. The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science: 2: 120-121.

Rammelsberg (1852) Annalen der Physik, Halle, Leipzig: 85: 141.

Sandonnini (1911) Gazzetta chimica italiana, Rome: 41: 144.

Goldschmidt, V. (1920) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 6: 12.

Nieuwenkamp (1933) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 86: 470.

Bannister (1934) Mineralogical Magazine: 23: 587.

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: 59-60.

Pasero, M. & Perchiazzi, N.(1996): Crystal structure refinement of matlockite. Mineralogical Magazine: 60: 833-836.

Internet Links for Matlockite

Localities for Matlockite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Australia
 
  • Tasmania
    • Zeehan district
      • Zeehan mineral field
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
Austria
 
  • Carinthia
    • Friesach - Hüttenberg area
      • Hüttenberg
        • Waitschach
U. Kolitsch and H. Pristacz (2009): An orthorhombic dimorph of barstowite, Pb4Cl6(CO3)•H2O, from slags at Maria Waitschach, Austria, and Lavrion, Greece. Poster, Joint MinPet 2009 and 4th MSCC, Budapest, Hungary, September 7-11; abstract in Mitt. Österr. Mineral. Ges. 155, 83.; Kolitsch, U., Brandstätter, F., Schreiber, F., Fink, R. & Auer, C. (2013): Die Mineralogie der weltweit einzigartigen Schlacken von Waitschach, Kärnten. Annalen des Naturhistorischen Museums in Wien, Serie A, 115, 19-87 (in German).
Chile
 
  • Antofagasta Region
    • Antofagasta Province
      • Sierra Gorda District
        • Caracoles
Berman, Frondel & Palache
  • Tarapacá Region
    • El Tamarugal Province
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: 60.
China
 
  • Shandong Province
    • Linyi Prefecture
      • Yimeng Mts (Yimeng Shan)
        • Mengyin Co.
          • Mengyin Kimberlite field
            • Changma Kimberlite belt
              • Wangcun deposit
Gorshkov, A.I., Titkov, S.V., Yan Nan Bao, Ryabchikov, I.D., and Magazina, L.O. (2006): Geology of Ore Deposits 48(4), 326-334.
France
 
  • Languedoc-Roussillon
    • Lozère
      • Marvejols
        • St Léger-de-Peyre
Galvier J. et al. (1997), La mine de Sainte Lucie, Lozère (France), Le Règne Minéral, n° 18, pp: 5-36; Mineralogical Record 2011 42:0-32
Germany
 
  • North Rhine-Westphalia
    • Ruhr Coal Mining area
      • Essen
Weiss: "Mineralfundstellen, Deutschland West", 1990
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
No reference listed
Grolig, H. & Grolig, E. (1978): Lavrion in Attika. Lapis, 3 (5), 16-25; 40 (in German).
        • Oxygon area
No reference listed
        • 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
Elmar Lackner collection
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian, (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Thorikos area
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Vrissaki area
Lacroix, A. & De Schulten, A. (1908): Note sur des minéraux plombifères des scories athéniennes du Laurion. Bulletin de la Société française de Minéralogie et de Cristallographie, 31, 79-90 (in French).; Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands; Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (II). Mineralien-Welt 25 (2), 82-95 (in German).
Italy
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
M. Russo & I. Campostrini (2011): Ammineite, matlockite and post 1944 eruption fumarolic minerals at Vesuvius. Plinius 37, 312.
  • Tuscany
    • Livorno Province
      • Campiglia Marittima
Int. Assoc. of Collectors of Slag Minerals, 10 (2), 4-6.
        • Sassetta
Jansen, H. & van den Berg, W. (1998): Slakkenmineralen in Toscane (Italië). Gea, no. 4, 109-117 (in Dutch).
      • Piombino
Cerutti, G. and Preite, D. (1995): Mineralien der etruskischen Schlacken von Baratti, Toskana. Lapis, 20 (4), 13-18; 50 (in German).
Luigi Chiappino data
South Africa
 
  • Mpumalanga Province
    • Nkangala District
      • Delmas
Minerals of South Africa
UK
 
  • England
    • Cornwall
      • St Agnes District
        • Crantock
BMS Newsletter 79, March 2010 (http://britishmicromountsociety.homestead.com/Gannell-Smelter.html)
    • Derbyshire
Greg, R.P. (1851): A Description of Matlockite, a New Oxychloride of Lead. The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science: 2: 120-121. Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.;
Jones, J. (1982): Bulletin of the Peak District Mines Historical Society 8(4), 260-261; Ford, T.D., Sarjeant, W.A.S., and Smith, M.E. (1993): UK Journal of Mines and Minerals 13, 16-55
    • Staffordshire
      • Ecton
        • Back of Ecton
XRD Univesity of Manitoba 2011
USA
 
  • Arizona
    • Gila Co.
      • Globe-Miami District
        • Globe Hills District
          • Globe Hills
            • Burch area
              • Radium
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 141, 146, 291; Bideaux, R.A., et al (1960), Some new occurrences of minerals of Arizona, AZ Geol. Soc. Digest: 3: 53-56.
    • Pima Co.
      • Tohono O'odom (Papago) Indian Reservation
        • Comobabi Mts
          • Cababi District (Comobabi District)
            • Ko Vaya
              • Mildren Mine group
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 278, 291.
    • Pinal Co.
      • Mammoth District
        • Tiger
          • St. Anthony deposit
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 135, 141; Williams, S.A. (1970a), Bideauxite, a new Arizona mineral, Min.Mag.: 37: 637-640; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 44.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 291; Bideaux, R.A. (1980), Tiger, Arizona, Min.Rec.: 11: 155-181; Fahey, J.J., et al (1950), Wherryite, a new mineral from the Mammoth mine, AZ, Am.Min.: 35: 93-98.
  • Nevada
    • Elko Co.
      • Spruce Mountain District
NBMG Spec. Pub. 31 Minerals of Nevada
  • South Dakota
    • Lawrence Co.
R&M 75:3 pp 156-169
        • Spearfish
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
Zimbabwe
 
  • Mashonaland West
    • Kadoma District
Vetter, U., Weck, H.-D., Weale, T., Klosa, D., Wittich, C. and Hoffmann, K. (1999): A provisional inventory of the Sanyati oxide-zone minerals, Zimbabwe. Z. Angew. Geol. 45, 15-21.
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