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Lead-bearing Feldspar

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Formula:
(K,Pb)-(Al,Si)-O
Crystal System:
Monoclinic
Likely a Pb-bearing variety of orthoclase. From Zechstein Cu deposits of the Fore-Sudetic Monocline, Poland. Contains up to 20.53 wt.% PbO (not enough to be Pb-dominant).
In ceramic glazes, at the interface with a lead glaze, lead potassium feldspars of typical formula (K,Pb)AlSi3O8 are formed.

Not to be confused with 'Unnamed (Pb-Feldspar)' - a Pb-dominant species.


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Unique IdentifiersHide

Mindat ID:
47545
Long-form identifier:
mindat:1:1:47545:9

Chemistry of Lead-bearing FeldsparHide

Mindat Formula:
(K,Pb)-(Al,Si)-O
Element Weights:
Element% weight
K47.635 %
Al32.873 %
O19.493 %

Calculated from ideal end-member formula.
Elements listed:
Al, K, O, Pb, Si - search for minerals with similar chemistry

Crystallography of Lead-bearing FeldsparHide

Crystal System:
Monoclinic
Cell Parameters:
a = 8.50 Å, b = 13.18 Å, c = 7.20 Å
β = 117.0°
Ratio:
a:b:c = 0.645 : 1 : 0.546
Unit Cell V:
718.70 ų (Calculated from Unit Cell)
Comment:
parameters close to those of synthetic PbAl2Si2O8

Synonyms of Lead-bearing FeldsparHide

RadioactivityHide

Other InformationHide

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 Lead-bearing FeldsparHide

References for Lead-bearing FeldsparHide

Localities for Lead-bearing FeldsparHide

Showing 3 localities.

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.
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Locality ListHide

- 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.
Namibia
 
  • Oshikoto Region
    • Tsumeb
Ettler et al. (2009)
Poland
 
  • Lesser Poland Voivodeship
    • Chrzanów County
      • Gmina Trzebinia
        • Trzebinia smelting plant
Włodyka et al. (2015)
  • Lower Silesian Voivodeship
Kucha (1985)
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