IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Pseudocotunnite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About PseudocotunniteHide

Formula:
K2PbCl4
Colour:
Colourless, white
Lustre:
Dull
Crystal System:
Orthorhombic
Name:
From the resemblance of the crystals to cotunnite.
Doubtful species, although the compound K2PbCl4 is known in synthetic form.
See also the related challacolloite.


Classification of PseudocotunniteHide

Approved, 'Grandfathered' (first described prior to 1959), Questionable
3.DC.90

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
11.2.1.1

11 : HALIDE COMPLEXES
2 : AmBX4
8.8.12

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

Physical Properties of PseudocotunniteHide

Colour:
Colourless, white

Optical Data of PseudocotunniteHide

Type:
Biaxial
Dispersion:
relatively weak

Chemical Properties of PseudocotunniteHide

Formula:
K2PbCl4
IMA Formula:
K2PbCl4 (?)

Crystallography of PseudocotunniteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 9.82 Å, b = 11.8 Å, c = 5.77 Å
Ratio:
a:b:c = 0.832 : 1 : 0.489
Unit Cell V:
668.60 ų (Calculated from Unit Cell)
Morphology:
Crystals flattened on {010} or {100}, with indistinct {hk0} and {0kl} faces; elongated [001] into needle-like or lath-like shapes. Veruginous aggregates and dendritic crusts.
Comment:
Probably orthorhombic (synthetic crystals have space group Pnma).

Type Occurrence of PseudocotunniteHide

Geological Setting of Type Material:
Active volcanic fumaroles.
Associated Minerals at Type Locality:

Synonyms of PseudocotunniteHide

Other Language Names for PseudocotunniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Bismuthinite3 photos of Pseudocotunnite associated with Bismuthinite on mindat.org.
Challacolloite1 photo of Pseudocotunnite associated with Challacolloite on mindat.org.

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.50BlixitePb2(O,OH)2ClOrth.
3.DC.55PinalitePb3WO5Cl2Orth.
3.DC.60SymesitePb10(SO4)O7Cl4 · H2OTric. 1 : P1
3.DC.65EcdemitePb6Cl4(As2O7)Tet.
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.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
8.8.9PenfielditePb2Cl3(OH)Hex. 6 : P6
8.8.10FiedleritePb3FCl4(OH) · H2OMon. 2/m
8.8.11BlixitePb2(O,OH)2ClOrth.
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:
Totally soluble in warm water.
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 PseudocotunniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Scacchi, A. (1873): Contribuzioni mineralogiche per servire alla storia dell'incendio vesuviano del mese di aprile 1872 (parte seconda). Rendiconti della Reale Accademia delle Scienze Fisiche e Matematiche di Napoli, Serie 1, 6, 69 pp.
Scacchi, A. (1873): Acc. Napoli Att.: 6: no. 9 (as Pseudocotunnia).
Palmieri (1873) Reale accademia delle scienze fisische e matematiche, Naples, Rend.: 92 (as Pseudocotunnite).
Lorenz & Ruckstuhl (1906): Zeitschrift für anorganische und allgemeine Chemie, 51, 70-80.
Pelloux, A. (1927): The minerals of Vesuvius. American Mineralogist, 12, 14-19.
Zambonini, F. (1935): Mineralogia vesuviana. (2nd ed. by E. Quercigh Eds. Napoli, Italy). Atti della Reale Accademia delle Scienze Fisiche e Matematiche di Napoli, Serie II, suppl. 20, 1-463.
Palache, Charles, Harry Berman & Clifford Frondel (1951): The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume II: 96-97.
Bellanca, A. & Sgarlata, F. (1952): Sulla struttura della pseudocotunnite. Rendiconti della Società Mineralogica Italiana, 8, 53.
Pensovecchio, M. & Salemi, E. (1952): Natura e sintesi della pseudocotunnite. Rendiconti della Società Mineralogica Italiana, 8, 58-59.

Internet Links for PseudocotunniteHide

Localities for PseudocotunniteHide

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.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium; Lavreotiki Municipality)
[MinMax website]
Italy (TL)
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
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: 96; Russo, M., 2006: I minerali di formazione fumarolica della grande eruzione vesuviana del 1906
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
          • Vulcano Island
Campostrini I. et al - Vulcano: ein aussergewohnlicher Fundpunkt von neuen und seltenen Mineralien - MineralienWelt 2010 - nr.3 - p.40-57
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 23, 2018 06:08:08 Page generated: October 6, 2018 12:13:05
Go to top of page