1) Hexagonal mineral 2) Sulfide mineral
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https://www.crosswordclues.com/clue/wurtzite
Wurtzite is a zinc iron sulfide mineral ((Zn,Fe)S) a less frequently encountered mineral form of sphalerite. The iron content is variable up to eight percent. It is trimorphous with matraite and sphalerite. It occurs in hydrothermal deposits associated with sphalerite, pyrite, chalcopyrite, barite and marcasite. It also occurs in low-temperature c...
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http://en.wikipedia.org/wiki/Wurtzite
a zinc sulfide mineral that occurs typically in Potosí, Bolivia; Butte, Mont.; and Goldfield, Nev. It is a rare and unstable (at temperatures below ... [1 related articles]
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http://www.britannica.com/eb/a-z/w/57
Wurtzite is a rare mineral formed mainly with other sulphide ores in hydrothermal veins. It is sometimes also found in concretions in sedimentary rocks such as clay and ironstone and in contact metamorphosed limestone.
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http://www.probertencyclopaedia.com/browse/HW.HTM
Zinc sulfide (alpha)
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http://www.translationdirectory.com/glossaries/glossary075.htm
(Zinc Iron Sulfide) Wurtzite is the not so common cousin of the much more common mineral, sphalerite . Sphalerite and wurtzite are both zinc iron sulfides with the same formula, (Zn, Fe)S. However what makes them different minerals is that they have different structures. The two are called polymorphs (meaning
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