Willemite definition of Willemite in the Free Online Encyclopedia.

willemite [′wil·ə‚mīt]

(mineralogy)

Zn₂SiO₄A white, greenish-yellow, green, reddish, or brown mineral that forms rhombohedral crystals and exhibits intense bright-yellow fluorescence in ultraviolet light; a minor ore of zinc.

Willemite

(after King Willem I of the Netherlands), a mineral, Zn₂SiO₄ (73.0 percent ZnO, 27.0 percent SiO₂). Admixtures of Mn²⁺ are common. Crystallizes in a trigonal system. The structure is complex, composed of tetrahedrons of SiO₄ and ZnO₄ linked by common oxygens. Prismatic or acicular crystals are rare; they are usually granular or radial-fibrous aggregates, incrustations, and so on.

Willemite is colorless, greenish, or yellowish brown, and it phosphoresces brightly in ultraviolet light or cathode rays. Hardness on the mineralogical scale, 5-6; density, 3,890-4,180 kg/m³. It formed both in oxidation zones of lead-zinc deposits and in certain contact-metasomatic deposits (at Franklin in the USA). It is used as a zinc ore. It is also used to make fluorescent screens in cathode-ray tubes and other instruments.

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No references found	Some of the "Calendar Girls" packing bags at Sainsbury's (from left), Kim Wood, Mandy Barwick, Kate Willemite and Sarah-Jane Longbottom COLLECTING CASH "Calendar Girls" and helpers (from left), Victoria and Hamish Malcolm, Sarah Whitelaw, Paula Farmer, Rosalyn Raine and Scarlett Whittell MEMBERS of Breakthrough West Yorkshire - known as the "Calendar Girls" - and their helpers packed shopping at Sainsbury's, Shore Head, Huddersfield, to raise cash for charity. FUNDRAISING DATE by Huddersfield Daily Examiner (Huddersfield, England)	Willard Frank Libby Willard, Emma Willard, Emma Hart Willard, Frances Willard, Frances Elizabeth Willard, Jim Willard, Nancy Willard, Simon Willard, Solomon Willebroek Canal Willebrord Snell Willem Barents Willem Bilderdijk Willem Buytewech Willem Claesz Heda Willem Cornelis Schouten Willem de Sitter Willem Einthoven Willem Elsschot Willem Hendrik Keesom Willem Jansz Willem Kalf Willem Kloos Willem Marinus Dudok Willem Pijper Willemite Willems, Jan Frans. Willemstad Willet, Marinus Willey, Gordon R. Willey, Walter Willi Bredel Willi Stoph William William 1 of Orange William 1 William The Conqueror William and Flora Hewlett Foundation William and Mary in Virginia, College of William and Mary, College William Anders William Augustus Tilden William Averell Harriman William B. Bankhead National Forest William B. Ide Adobe State Historic Park William B. Umstead State Park William Bateson William Beardall Tosohatchee State Reserve William Blake William Bliss Carman William Borah William Bowie	Willem Frederik Willem Frederik George Lodewijk Willem Frederik George Lodewijk Willem Frederik Hermans Willem Frederik Hermans Instituut Willem Hendrik Willem Hendrik Willem Hendrik Keesom Willem I of Orange Willem Jansz Willem Janszoon Willem Kalf Willem Kalff Willem Kloos Willem Linders Quality Consultancy Willem Marinus Dudok Willem Mengelberg Willem Mengelberg Willem of Orange Willem of Orange Willem Pijper Willem Schouten Willem van de Velde Willem van de Velde Willem van de Velde the Elder Willem van de Velde the Elder Willem van de Velde the Younger Willem van de Velde the Younger Willem van oranje Willem Zwijgt Niet Meer Willemite Willems, Jan Frans. Willemstad Willemstad Willemstad (Netherlands) Willemstad (Netherlands) Willemstad / Curacao Island, Netherlands Antilles Areopuerto Hato Willen Is Kunnen Willenhall Education, Employment and Training Centre Willenserklärung Willer Willesden Cycling Club Willesden Local History Society willet Willet Green Miller Centre Willet, Marinus willets Willets Point Industry and Realty Association Willett forceps Willett forceps Willett forceps Willett Pratt Training Center Willetton Junior Cricket Club Willey, Gordon R. Willey, Walter willful willful willful willful willful abandonment willful burning of property

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Some of the "Calendar Girls" packing bags at Sainsbury's (from left), Kim Wood, Mandy Barwick, Kate Willemite and Sarah-Jane Longbottom COLLECTING CASH "Calendar Girls" and helpers (from left), Victoria and Hamish Malcolm, Sarah Whitelaw, Paula Farmer, Rosalyn Raine and Scarlett Whittell MEMBERS of Breakthrough West Yorkshire - known as the "Calendar Girls" - and their helpers packed shopping at Sainsbury's, Shore Head, Huddersfield, to raise cash for charity.

FUNDRAISING DATE by Huddersfield Daily Examiner (Huddersfield, England)

Willard, Frances Elizabeth