Matlockite
A valid IMA mineral species - grandfathered
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About Matlockite
Formula:
PbFCl
Colour:
Colourless, light yellow to light golden-yellow, greenish
Lustre:
Adamantine, Pearly
Hardness:
2½ - 3
Specific Gravity:
7.12
Crystal System:
Tetragonal
Member of:
Name:
After the locality near Matlock, Derbyshire, England.
Unique Identifiers
Mindat ID:
2593
Long-form identifier:
mindat:1:1:2593:1
GUID
(UUID V4):
(UUID V4):
8165fc87-9b6a-4ee2-b637-09c32997b9b8
IMA Classification of Matlockite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
PbClF
First published:
1851
Classification of Matlockite
3.DC.25
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
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
9 : NORMAL HALIDES
2 : AX2
8.8.2
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
8 : Halides of Pb
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
8 : Halides of Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Mtl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Matlockite
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Physical Properties of Matlockite
Adamantine, Pearly
Transparency:
Transparent
Colour:
Colourless, light yellow to light golden-yellow, greenish
Hardness:
2½ - 3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {001}.
On {001}.
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
7.12 g/cm3 (Measured) 7.16 g/cm3 (Calculated)
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.
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.
Chemistry of Matlockite
Mindat Formula:
PbFCl
Elements listed:
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 = 4.11 Å, c = 7.23 Å
Ratio:
a:c = 1 : 1.759
Unit Cell 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.
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0017948 | Matlockite | Nieuwenkamp W, Bijvoet J (1932) Die Kristallstruktur von Bleifluochlorid Pb F Cl _cod_database_code 1011046 Zeitschrift fur Kristallographie 81 469-473 | 1932 | 0 | 293 | ||
0011855 | Matlockite | Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 294-296 | 1963 | 0 | 293 | ||
0014434 | Matlockite | Bannister F A, Hey M H (1934) The crystal-structure and optical properties of matlockite (PbFCl) Mineralogical Magazine 23 587-597 | 1934 | Matlock, Derbyshire, England | 0 | 293 | |
0014521 | Matlockite | Pasero M, Perchiazzi N (1996) Crystal structure refinement of matlockite Mineralogical Magazine 60 833-836 | 1996 | Baratti beach, Tuscany, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.574 Å | (100) |
2.906 Å | (45) |
3.617 Å | (40) |
2.265 Å | (40) |
2.715 Å | (35) |
1.781 Å | (25) |
2.055 Å | (20) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
45b : [Other oxidized fumarolic minerals] | |
47a : [Near-surface hydration of prior minerals] |
Type Occurrence of Matlockite
Place of Conservation of Type Material:
Natural History Museum, London, England, 89055.
Associated Minerals at Type Locality:
Reference:
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.
Synonyms of Matlockite
Lead oxychloride (in part)
Other Language Names for Matlockite
Relationship of Matlockite to other Species
Member of:
Other Members of this group:
Bismoclite | BiOCl | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
Daubréeite | BiO(OH) | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
Laurionite | PbCl(OH) | Orth. mmm (2/m 2/m 2/m) |
Paralaurionite | PbCl(OH) | Mon. 2/m : B2/m |
Rorisite | CaFCl | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
Zavaritskite | (BiO)F | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
Common Associates
Associated Minerals Based on Photo Data:
12 photos of Matlockite associated with Diaboleite | Pb2CuCl2(OH)4 |
8 photos of Matlockite associated with Phosgenite | Pb2CO3Cl2 |
6 photos of Matlockite associated with Wherryite | Pb7Cu2(SO4)4(SiO4)2(OH)2 |
6 photos of Matlockite associated with Leadhillite | Pb4(CO3)2(SO4)(OH)2 |
4 photos of Matlockite associated with Paralaurionite | PbCl(OH) |
4 photos of Matlockite associated with Anglesite | PbSO4 |
3 photos of Matlockite associated with Galena | PbS |
2 photos of Matlockite associated with Laurionite | PbCl(OH) |
2 photos of Matlockite associated with Mammothite | Pb6Cu4AlSb5+O2(OH)16Cl4(SO4)2 |
2 photos of Matlockite associated with Mattheddleite | Pb5(SiO4)1.5(SO4)1.5(Cl,OH) |
Related Minerals - Strunz-mindat Grouping
3.DC. | Lucabindiite | (K,NH4)As4O6(Cl,Br) |
3.DC. | Torrecillasite | Na(As,Sb)3+4O6Cl |
3.DC. | Gajardoite | KCa0.5As3+4O6Cl2 · 5H2O |
3.DC. | Cuatrocapaite-(NH₄) | (NH4)3(NaMg◻)(As2O3)6Cl6 · 16H2O |
3.DC. | Cuatrocapaite-(K) | K3(NaMg◻)(As2O3)6Cl6 · 16H2O |
3.DC. | Napoliite | Pb2OFCl |
3.DC.05 | Laurionite | PbCl(OH) |
3.DC.05 | Paralaurionite | PbCl(OH) |
3.DC.05 | Russoite | (NH4)ClAs2O3(H2O)0.5 |
3.DC.05 | Mauriziodiniite | (NH4)(As2O3)2I |
3.DC.10 | Fiedlerite | Pb3FCl4(OH) · H2O |
3.DC.15 | Penfieldite | Pb2Cl3(OH) |
3.DC.15 | Telluroperite | Pb3TeO4Cl2 |
3.DC.20 | Laurelite | Pb7F12Cl2 |
3.DC.25 | Bismoclite | BiOCl |
3.DC.25 | Rorisite | CaFCl |
3.DC.25 | Zavaritskite | (BiO)F |
3.DC.25 | Zhangpeishanite | BaFCl |
3.DC.30 | Nadorite | PbSbClO2 |
3.DC.30 | Perite | PbBiClO2 |
3.DC.40 | Thorikosite | Pb3Cl2(OH)(SbO3,AsO3) |
3.DC.45 | Mereheadite | Pb47Cl25(OH)13O24(CO3)(BO3)2 |
3.DC.50 | Blixite | Pb8O5(OH)2Cl4 |
3.DC.52 | Rumseyite | Pb2OClF |
3.DC.55 | Pinalite | Pb3WO5Cl2 |
3.DC.55 | Vladkrivovichevite | [Pb32O18][Pb4Mn2O]Cl14(BO3)8 · 2H2O |
3.DC.57 | Yeomanite | Pb2O(OH)Cl |
3.DC.60 | Lorettoite | Pb7O6Cl2 |
3.DC.60 | Symesite | Pb10(SO4)O7Cl4 · H2O |
3.DC.62 | Sarawakite (of Frenzel) | Sb, O, Cl (?) |
3.DC.65 | Ecdemite | Pb6Cl4(As2O7) |
3.DC.70 | Mendipite | Pb3Cl2O2 |
3.DC.75 | Damaraite | Pb3Cl(OH)O2 |
3.DC.80 | Onoratoite | Sb8Cl2O11 |
3.DC.95 | Barstowite | Pb4Cl6(CO3) · H2O |
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.
Internet Links for Matlockite
mindat.org URL:
https://www.mindat.org/min-2593.html
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References for Matlockite
Reference List:
Bannister, F. A. (1934) The crystal-structure and optical properties of matlockite (PbFCl) Mineralogical Magazine and Journal of the Mineralogical Society, 23 (146) 587-597 doi:10.1180/minmag.1934.023.146.02
Localities for Matlockite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Australia | |
| Bottrill et al. (2008) |
Austria | |
| abstract in Mitt. Österr. Mineral. ... +2 other references |
Chile | |
| Berman |
| Palache et al. (1951) |
China | |
| Gorshkov et al. (2006) |
France | |
| Mineralogical Record 2011 42:0-32 +1 other reference |
Germany | |
| Weiß (1990) |
Greece | |
| |
40 (in German) +1 other reference | |
Fritz Schreiber collection (SXRD-analysed by Uwe Kolitsch) | |
Elmar Lackner collection | |
Gelaude et al. (1996) | |
Gelaude et al. (1996) | |
Gelaude et al. (1996) | |
Lacroix et al. (1908) +2 other references | |
Greenland | |
| University of Oslo |
Italy | |
| M. Russo & I. Campostrini (2011) +1 other reference |
Pelloux (1927) +3 other references | |
| Russo et al. (2011) +1 other reference |
Russo et al. (2011) +1 other reference | |
| Marco Bonifazi collection |
| Parola et al. (2023) +1 other reference |
| Int. Assoc. of Collectors of Slag Minerals (2) |
| Franzini et al. (1992) +2 other references |
| Jansen et al. (1998) |
| Luigi Chiappino data |
Namibia | |
| Bowell +1 other reference |
| 110-147. +1 other reference |
Russia | |
| Pavel M. Kartashov analytical data of ... |
South Africa | |
| Cairncross et al. (1995) |
UK | |
| BMS Newsletter 79 (http://britishmicromountsociety.homestead.com/Gannell-Smelter.html) |
| Norman Wilson collection |
| Greg (1851) |
| Jones (1982) +1 other reference |
| XRD Univesity of Manitoba 2011 |
USA | |
| Bideaux et al. (1960) +1 other reference |
| Anthony et al. (1995) |
| Galbraith (1959) +3 other references |
Fahey et al. (1950) +2 other references | |
| Castor et al. (2004) |
| Smith et al. (2000) |
| Roberts et al. (1965) |
Zimbabwe | |
| Vetter et al. (1999) +1 other reference |
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Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA