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Penfieldite

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About PenfielditeHide

05217650014946499277687.jpg
Samuel Lewis Penfield
Formula:
Pb2Cl3(OH)
Colour:
Colourless, white, yellowish or bluish tints
Lustre:
Adamantine, Greasy
Hardness:
3 - 4
Specific Gravity:
5.82 - 6.61
Crystal System:
Hexagonal
Name:
For US mineralogist, Samuel Lewis Penfield (Catskill, New York, January 16, 1856 - August 12, 1906, at South Woodstock, Connecticut), Yale University.
Soluble in water, leaving a yellowish white lead oxychloride residue.


Classification of PenfielditeHide

Approved, 'Grandfathered' (first described prior to 1959)
3.DC.15

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
10.4.1.1

10 : OXYHALIDES AND HYDROXYHALIDES
4 : A2(O,OH)Xq
8.8.9

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

Pronounciation of PenfielditeHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of PenfielditeHide

Adamantine, Greasy
Transparency:
Transparent
Colour:
Colourless, white, yellowish or bluish tints
Hardness:
3 - 4 on Mohs scale
Cleavage:
Distinct/Good
On {0001}.
Density:
5.82 - 6.61 g/cm3 (Measured)    6.00 g/cm3 (Calculated)

Optical Data of PenfielditeHide

Type:
Uniaxial (+)
RI values:
nω = 2.130(1) nε = 2.210(1)
Max Birefringence:
δ = 0.080
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of PenfielditeHide

Formula:
Pb2Cl3(OH)

Crystallography of PenfielditeHide

Crystal System:
Hexagonal
Class (H-M):
6 - Trigonal Dipyramidal
Space Group:
P6
Cell Parameters:
a = 11.28 Å, c = 48.65 Å
Ratio:
a:c = 1 : 4.313
Unit Cell V:
5,360.83 ų (Calculated from Unit Cell)
Morphology:
Crystals usually prismatic [0001] with {1010} or steeply pyramidal; also tabular {0001}. Crystals tiny and commonly grouped in parallel position.
Twinning:
1. Twin axis [2130] with (0001) as composition face. Twinned crystals having [0001] in common but turned 21°47' to each other. 2. Twin plane {4154} with the twinned crystals having c and c' almost at right angles.
Comment:
Strongly pronounced subcell: a = 11.393, c = 4.024 A (Merlino et al., 1995)

Crystallographic forms of PenfielditeHide

Crystal Atlas:
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Penfieldite no.1 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Edge Lines | Miller Indices | Axes

Transparency
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X-Ray Powder DiffractionHide

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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Geological EnvironmentHide

Geological Setting:
oxidized hydrothermal lead deposit

Type Occurrence of PenfielditeHide

Geological Setting of Type Material:
Seawater modified slag deposits
Associated Minerals at Type Locality:

Other Language Names for PenfielditeHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
9 photos of Penfieldite associated with BoleiteKPb26Ag9Cu24(OH)48Cl62
3 photos of Penfieldite associated with PseudoboleitePb31Cu24Cl62(OH)48
2 photos of Penfieldite associated with CotunnitePbCl2
1 photo of Penfieldite associated with LaurionitePbCl(OH)
1 photo of Penfieldite associated with HydrocerussitePb3(CO3)2(OH)2
1 photo of Penfieldite associated with CupriteCu2O
1 photo of Penfieldite associated with DiaboleitePb2CuCl2(OH)4
1 photo of Penfieldite associated with Unnamed (Orthorhombic dimorph of Barstowite)Pb4CO3Cl6 · H2O

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.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.70MendipitePb3Cl2O2Orth. 2 2 2 : P21 21 21
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)
8.8.5MendipitePb3Cl2O2Orth. 2 2 2 : P21 21 21
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
8.8.10FiedleritePb3FCl4(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 HNO3. Decomposed by water, rendering a yellow-white precipitate of lead oxychloride.
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 PenfielditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Genth, F.A. (1892) On penfieldite, a new species. American Journal of Science 144, 260-261.
Penfield (1894) American Journal of Science: 48: 114.
Goldschmidt (1897) 260.
Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 118.
American Mineralogist (1941) 26: 293.
Gordon (1941) Academy of Natural Science of Philadelphia, Not. Nat., no. 69.
Palache, C., Berman, H., and 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: 66-67.
Cesbron, F. and Schubnel, H.J. (1968) Penfieldite. Bulletin de la Société française de Minéralogie et de Cristallographie, 91, 407-408 (in French).
Merlino, S., Pasero, M., Perchiazzi, N., and Gianfagna, A. (1995) X-ray and electron diffraction study of penfieldite: average structure and multiple cells. Mineralogical Magazine, vol. 59, n° 395, 341-347.

Internet Links for PenfielditeHide

Localities for PenfielditeHide

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.
Afghanistan
 
  • Panjshir
    • Khinj District
Merkel, S., Bräutigam, B., Klein, S., & Hauptmann, A. (2013). The Analysis of Slag from the Panjhır Mining Region, Afghanistan: An Investigation of (Medieval) Silver Production Technology. Archäologische Mitteilungen, 45, 231-250.
Austria
 
  • Carinthia
    • Sankt Veit an der Glan District
      • Hüttenberg
        • Hüttenberg
          • Waitschach
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
    • Antofagasta 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: 67.
        • Caracoles
Brugger J, Meisser N, Ansermat S, Krivovichev S V, Kahlenberg V, Belton D, Ryan C G (2012) Leucostaurite, Pb2[B5O9]Cl·0.5H2O, from the Atacama Desert: The first Pb-dominant member of the hilgardite group, and micro-determination of boron minerals by PIGE. American Mineralogist 97, 1206-1212
Freundlich, B. F., Imel, A., Imel, L., Sperber, D., Sperber, P., Steele-Sperber, L., ... & McGrath, B. 39th Rochester Mineralogical Symposium.; maurizio dini collection - analysed material
Czech Republic
 
  • Central Bohemian Region
    • Příbram District
C.Auer (2017)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
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 (I). Mineralien-Welt 25 (1), 60-75 (in German). [identification announced; no description given yet]
          • Sounion
            • Cato Sounio mines
Rieck, B., Kolitsch, U., Voudouris, P., Giester, G. and Tzeferis, P. (2018): Weitere Neufunde aus Lavrion, Griechenland. Mineralien-Welt 29 (5), 32-77 (in German).
Smith, G. F. H. (1899): On some lead minerals from Laurium, namely, laurionite, phosgenite, fiedlerite, and (new species) paralaurionite. Mineralogical Magazine, 12, 102-110.; American Mineralogist (1941): 26: 293; 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: 67; Cesbron, F. & Schubnel, H. J. (1968): Penfieldite. Bulletin de la Société française de Minéralogie et de Cristallographie, 91, 407-408 (in French).; Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian, Laurion: The Minerals in the Ancient Slags; Grolig, H. & Grolig, E. (1978): Lavrion in Attika. Lapis, 3 (5), 16-25; 40 (in German).
          • 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
Fritz Schreiber Collection
Laurion The minerals in the ancient slags,page 115
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
Italy
 
  • Lazio
    • Metropolitan City of Rome Capital
      • Anzio
Palombi, S., Bellatreccia, F. & Pucci, R. (2009): Le scorie metallurgiche di Tor Caldara, Anzio - RM. Il Cercapietre, no. 1-2, 44-56. [http://www.gminromano.it/Cercapietre/rivista09/art03.pdf]
  • Liguria
    • Genoa
      • Genoa
        • Varenna Valley
Rivista Mineralogica Italiana, 2 (Avril/Juin), 175-188.
  • Tuscany
    • Livorno Province
      • Campigliese (Campiglia Mountains; Campiglia Ridge)
        • Campiglia Marittima
          • Madonna di Fucinaia (Madonna della Fucinaia) slag heaps
http://www.comune.pisa.it/apsn/Articoli/Scorie/Capattoli.htm
      • Piombino
Franzini, M., Perchiazzi, N. (1992): I minerali delle scorie ferrifere etrusche di Baratti (Livorno). Atti della Società Toscana di Scienze Naturali, Memorie, Serie A, 99, 43-77; Franzini, M., Perchiazzi, N., Bartoli, M.L., Chiappino, L. (1992): Baratti (LI): una nuova località mineralogica italiana analoga al Laurion. Rivista Mineralogica Italiana, 15, 2 (2-1992), 67-75 [2a parte]; Cerutti, G., Preite, D. (1995): Mineralien der etruskischen Schlacken von Baratti, Toskana. Lapis, 20, 4, 13-18 and 50.
South Africa
 
  • North West
    • Bojanala Platinum District
Barkov, A. Y., Martin, R. F., Kaukonen, R. J., & Alapieti, T. T. (2001). The occurrence of Pb–Cl–(OH) and Pt–Sn–S compounds in the Merensky reef, Bushveld layered complex, South Africa. The Canadian Mineralogist, 39(5), 1397-1403.
Spain
 
  • Murcia
    • Cartagena
      • Cabo de Palos Range
Rewitzer, C., Calvo, M. Hochleitner, R., and Utrera, C. (2018). Cotunnite, caracolite, sideronatrite and other rare secondary minerals in the "Ferruginosa" mine, Cabo de Palos, Cartagena, Murcia, Spain. Mineral Up, 5 (1), 66-79.
Tunisia
 
  • Mahdia
    • Mahdia
Kutzke, H., Barbier, B., Becker, P. & Eggert, G. (1997): Barstowite as a corrosion product on a lead object from the Mahdia shipwreck. Studies in Conservation 42, 176-180.
UK
 
  • England
    • Cornwall
      • Crantock
BMS Newsletter 79, March 2010 (http://britishmicromountsociety.homestead.com/Gannell-Smelter.html)
USA
 
  • Idaho
    • Shoshone Co.
      • Mullan
R&M 70:4 pp 242-263
Vietnam
Pavel M. Kartashov analytical data (2011)
 
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