nosean


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nosean

(ˈnəʊzɪən)
n
(Geological Science) mineralogy a mineral with formula Na8Al6Si6O24(SO4), found in igneous rock as isometric crystals
[named after the German mineralogist K. W. Nose (1753–1835), who discovered it]
References in periodicals archive ?
Contract Awarded for Law In Order invoices re Project NOSEAN
Birmingham (1988) reported tiny purple crystals enclosed in sodalite and nosean in the Tertiary intrusives.
Species range from the very common (apophyllite, barite, calcite, corundum) to the semi-exotic (baddeleyite, hauynite, nosean, ettringite, jeremejevite) to the extremely rare (hannebachite, willhendersonite, the not-yet-published batiferrite), and all in selections liberal enough to show a full range of habits--I counted 25 pictures, each one different, of barytolamprophyllite alone.
Occurrence: In a thin aegirine-potassic-feldspar pegmatite crosscutting nepheline and nosean syenites.
The sodalite family is composed of the minerals sodalite, nosean, hauyne and lazurite; cubic aluminosilicate species with the formula [(Na,Ca).sub.4-8] [Al.sub.6][Si.sub.6][O.sub.24][([SO.sub.4],Cl,OH,S).sub.1-2] n[H.sub.2]O.
Three of the four members of the sodalite group - sodalite, hauyne and lazurite - are known to occur at Monte Somma/Vesuvius, while unconfirmed tests suggest that the fourth member, nosean, is also present.
Typical associated minerals include a sodalite-group mineral (sodalite, lazurite, hauyne or nosean), nepheline, diopside, sanidine, pargasite, phlogopite-biotite and calcite.