Mineralogy and Crystallography

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nepheline

A Dictionary of Earth Sciences | 1999 | | Copyright

nepheline An important member of the feldspathoid group of silicate minerals with composition Na₃(Na,K)[Al₄Si₄O₁₆], which approximates to NaAlSiO₄ (with some K replacing Na); nepheline is an end-member of the series with kalsilite (KAlSiO₄); sp. gr. 2.56–2.66; hardness 5.5–6.0; hexagonal; colourless, grey, yellowish, brownish, reddish, or greenish; vitreous to greasy lustre; crystals normally prismatic, short, and columnar, thick, and tabular, or coarse, granular aggregates; cleavage imperfect prismatic {1010}, poor basal {0001}; it is a primary crystallizing mineral of silica-poor alkaline igneous rocks in association with aegirine augite and alkali amphiboles, and is an essential mineral in some silica undersaturated rocks (see SILICA SATURATION) such as nepheline syenites and nephelinites.

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AILSA ALLABY and MICHAEL ALLABY. "nepheline." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "nepheline." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-nepheline.html

AILSA ALLABY and MICHAEL ALLABY. "nepheline." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-nepheline.html

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nepheline

Oxford Dictionary of Rhymes | 2007 | Copyright

nepheline •gradine • sanidine •codeine, Roedean •undine • iodine •Aberdeen, gaberdine •almandine • grenadine • Geraldine •caffeine • Delphine • Josephine •morphine • carrageen • aubergine •indigene • hygiene • phosgene •Eugene • Tolkien • Kathleen •Arlene, Charlene, Darlene, Marlene, praline •Hellene, philhellene •Aileen, Raelene, scalene •spring-clean • crimplene • Abilene •Ghibelline • Cymbeline • terylene •vaseline • acetylene • Mytilene •Eileen • colleen • Pauline •mousseline • Hölderlin • nepheline •Evangeline •Jacqueline, Sakhalin •Emmeline • tourmaline • trampoline •gasoline • naphthalene • Rosaleen •rosaline

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"nepheline." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O233-nepheline.html

"nepheline." Oxford Dictionary of Rhymes. 2007. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-nepheline.html

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Free newspaper and magazine articles

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