Mineralogy and Crystallography

sphene

A Dictionary of Earth Sciences | 1999 | | Copyright

sphene (titanite) A nesosilicate CaTiSiO₄ (O,OH,F); sp. gr. 3.45–3.55; hardness 5; crystals wedge-shaped, occasionally massive; brown, grey, reddish brown, yellow, or black; monoclinic; adamantine to resinous lustre; occurs as a primary accessory mineral in calc-alkaline igneous rocks and alkaline igneous rocks in which it may occur as a major constituent along with apatite, nepheline, and aegirine. It is common in contact metamorphosed limestones, particularly skarns.

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AILSA ALLABY and MICHAEL ALLABY. "sphene." A Dictionary of Earth Sciences. 1999. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-sphene.html

A Dictionary of Earth Sciences | 1999 | | Copyright

titanite See SPHENE.

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Pick a style below, and copy the text for your bibliography.

AILSA ALLABY and MICHAEL ALLABY. "titanite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "titanite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O13-titanite.html

AILSA ALLABY and MICHAEL ALLABY. "titanite." A Dictionary of Earth Sciences. 1999. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-titanite.html

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