Zincite


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Related to Zincite: franklinite

zincite

[′ziŋ‚kīt]
(mineralogy)
(Zn,Mn)O A deep-red to orange-yellow brittle mineral; an ore of zinc. Also known as red oxide of zinc; red zinc ore; ruby zinc; spartalite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Zincite

 

a mineral of the class of simple oxides. Zincite, with the chemical composition ZnO, usually contains admixtures of MgO (up to 9 percent), PbO (up to 5.3 percent), and FeO (up to 1.1 percent). It crystallizes in the hexagonal system. It usually occurs in the form of granular aggregates; zincite crystals are rare. The color ranges from orange-yellow to dark red. The hardness on Mohs’ scale is 4–5, and the density is 5,640–5,680 kg/m3. A semiconductor, zincite is found in recrystallized limestones of contact metasomatic deposits, in which it is associated with willemite, franklinite, and other rare minerals. Zincite is mined in the USA, at Franklin, N.J., as a zinc ore. It has also been discovered in several lead-zinc deposits.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Both ZnO 30 and ZnO 40 display diffraction peaks characteristics of zincite [26], at the angular values of 31.8[degrees], 34.6[degrees], and 36.2[degrees].
The ZnO synthesized by both the coprecipitation and the hydrothermal methods had the same XRD pattern corresponding to zincite (S3, S4, S5, and S6; Table 1).
The dominant phases identified by XRD analysis are zincite, franklinite and magnetite.
In the oxidation zone, zincite is widespread as brownish yellow earthy fillings.
Other associated minerals are: smithsonite, zincite, greenockite and quartz.
Harter (1928), for instance, reported franklinite and zincite from Butte.
Of course, interesting crystal growth may also happen accidentally, sometimes as a byproduct of industrial operations, as in the case of the artificial zincite crystals from Poland which appeared on the mineral market in the early 1990's (Robinson and King, 1991; Cooper, 1993).
The following standards were used: sanidine (K K[alpha]), cuprite (Cu K[alpha]), diopside (Ca K[alpha]), nichromite (Ni K[alpha]), zincite (Zn K[alpha]), synthetic [Cd.sub.5][([PO.sub.4].sub.3](OH) (Cd L[alpha]), gehlenite (Al K[alpha]), synthetic V[P.sub.2][O.sub.7] (V K[alpha]), apatite (P K[alpha]) and phlogopite (F K[alpha]).
All of the determined peaks belong to zincite (PDF card number 01-079-0208) [24].
183, Munich 81735), where the specialty item was man-made zincite. Next to that came an offering of colored alabaster nightlights; then began a group of Moroccan dealers and meteorite sellers.
The zinc aluminate coatings remain in the amorphous state when deposited at substrate temperatures up to 400[degrees]C (Figure 2(a)); as the substrate temperature is increased to 450[degrees]C, some peaks corresponding to hexagonal phase of ZnO (zincite, ICCD Card File no.
In the first half of the 19th century, to the extent that Franklin and Sterling Hill were thought of as zinc mines, the most avidly sought of their ore species was the bright red zincite (ZnO) that was often found as large masses and lenses in black franklinite, particularly at Sterling Hill.