cylindrite

[sə′lin‚drīt]

(mineralogy)

Pb₃Sn₄Sb₂S₁₄ A blackish-gray mineral consisting of sulfur, lead, antimony, and tin, occurring in cylindrical forms that separate under pressure into distinct sheets or folia.

References in periodicals archive ?

Cylindrite (Pb, Sn)[.sub.8][Sb.sub.4][Fe.sub.2][Sn.sub.5][S.sub.27]

Cylindrite occurs in a unique habit consisting of very thin, leadgray folia rolled up into cylinders.

Vuggy masses of franckeite lined with drusy franckeite crystals from 2 to 5 mm are currently the main ore in one portion of the Contacto vein, where franckeite is associated with pyrite, arsenopyrite, wurtzite and rare cylindrite. It also occurs abundantly in the Plata vein.

Franckeite and cylindrite are almost invariably associated with some stannite (Bandy, 1944).

Famous mineral localifies: Llallagua, Bolivia

The cylindrite structure has been interpreted as consisting of incommensurable alternating layers of pseudo-tetragonal and pseudo-hexagonal symmetry.

An example is "cylindrite <homologue (19,13)Q/(30,12)H>" for a homologue of the cylindrite series with a tetragonal (quadratic) building block of 19 by 13 units which is commensurable with a hexagonal block of 30 by 12 units.

The IMA Commission on New Minerals and Mineral Names: Procedures and Guidelines on Mineral Nomenclature 1998

[59] studied the formation of [beta] cylindrites by extruding supercooled iPP melt through capillary die.

Tailoring microstructure and mechanical properties of injection molded isotactic-polypropylene via high temperature preshear

Upon further investigation, they found that the supermolecular structure actually consists of two separate layers: an [Alpha] row-nucleated region in the vicinity of the fiber surface and [Beta] cylindrites growing selectively from the [Alpha] nuclei.