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Cymraeg

Queitite

Crystal System: Monoclinic
Status of Occurrence: Confirmed Occurrence
Distribution: Rare
Chemical Composition: Lead zinc silicate sulphate
Chemical Formula: Pb4Zn2SO4SiO4Si2O7
Method(s) of Verification: Penrhiw Mine - EMPA shows Pb, Zn, Si and S in similar ratios to queitite from Red Gill Mine, Caldbeck Fells (Mason & Green, 1995).

Geological Context:

Introduction: queitite is an extremely rare secondary mineral typically developed in the oxidized zone of lead-zinc bearing ore bodies and through post-mining alteration of lead-zinc ore.
Occurrence in Wales: a single specimen displaying microscopic crystal sprays was collected from weathered veinstone in a small section of dumps at Penrhiw Mine in the Central Wales Orefield.

Key Localities:

There are no key localities for this specimen.

References:

  1. Mason, J.S. & Green, D.I., 1995. Supergene minerals including exceptional ramsbeckite from Penrhiw Mine, Ystumtuen, Dyfed. UK Journal of Mines & Minerals, 15, 21-27.

There are no references for this specimen.