Orange, yellow-orange to deep red, red, rarely yellow, rarely green and colorless to white
Crystal habit
Disseminated – occurs in small, distinct particles dispersed in matrix.
Twinning
On {0001}
Cleavage
On {1010}, perfect; parting on {0001}
Fracture
Conchoidal
Tenacity
Brittle
Mohs scale hardness
4
Luster
Subadamantine to resinous
Streak
Yellowish orange
Diaphaneity
Translucent, transparent in thin fragments
Specific gravity
5.64–5.68
Optical properties
Uniaxial (+)
Refractive index
nω = 2.013, nε = 2.029
Birefringence
δ = 0.016
References
[2][3]
Zincite is the mineral form of zinc oxide (ZnO). Its crystal form is rare in nature; a notable exception to this is at the Franklin and Sterling Hill Mines in New Jersey, an area also famed for its many fluorescent minerals. It has a hexagonal crystal structure and a color that depends on the presence of impurities. The zincite found at the Franklin Furnace is red-colored, mostly due to iron and manganese dopants, and associated with willemite and franklinite.
Microscopic image of Zincite and Franklinite under normal light
Zincite crystals can be grown artificially, and synthetic zincite crystals are available as a by-product of zinc smelting. Synthetic crystals can be colorless or can range in color from dark red, orange, or yellow to light green.
Synthetic zincite crystals
Both natural and synthetic zincite crystals are significant for their early use as semiconductor crystal detectors in the early development of crystal radios before the advent of vacuum tubes. As an early radio detector it was used in conjunction with another mineral, galena, and this device was known as the cat's-whisker detector.
Zincite is the mineral form of zinc oxide (ZnO). Its crystal form is rare in nature; a notable exception to this is at the Franklin and Sterling Hill...
surface of one of the zincite crystals. When a sensitive spot was located, the arm was locked in place with the setscrew. Multiple zincite pieces were provided...
conductors, and first-aid tapes. Although it occurs naturally as the mineral zincite, most zinc oxide is produced synthetically. Early humans probably used...
are fluorescent. More commonly, it occurs with willemite, calcite, and zincite. In these rocks, it forms as disseminated small black crystals with their...
the manufacturing of radio detectors. The result was astonishing: with a zincite (zinc oxide) crystal he gained amplification. This was a negative resistance...
separately. XO form Periclase group Periclase MgO Manganosite MnO Zincite group Zincite ZnO Bromellite BeO Tenorite CuO Litharge PbO X2O form Cuprite Cu2O...
Franklin and Sterling Hill Mines in New Jersey. It often occurs with red zincite (zinc oxide) and franklinite (Fe,Mn,Zn)(Fe,Mn)2O4 (an iron rich zinc mineral...
The mineral association (assemblage) from Franklin includes willemite, zincite and franklinite. During the mid-to-late 19th century the furnace was the...
their metal oxides, such as in the carbothermic reaction of zinc oxide (zincite) to produce zinc metal: ZnO + C ⟶ Zn + CO {\displaystyle {\ce {ZnO + C...
occurs with mooreite, willemite, fluorite, hydrozincite, pyrochroite, zincite and rhodochrosite at Sterling Hill, New Jersey. Warr, L.N. (2021). "IMA–CNMNC...
Unlike the other silver halides, iodargyrite (AgI) contains a hexagonal zincite lattice structure. The silver halides have a wide range of solubilities...
Manganosite Black manganosite crystals with zincite and sonolite General Category Oxide mineral Formula (repeating unit) Manganese oxide, MnO IMA symbol...
Refractive index (nD) n11.7184, n2=1.733 Structure Crystal structure Hexagonal, zincite Space group P63mc Point group C6v Lattice constant a = 2.6979 Å, c = 4...
began to research these "oscillating crystals" and discovered that biased zincite (zinc oxide) crystals could amplify a signal. Losev was the first to exploit...
slag, and is associated with native zinc, hydrocerussite, diaboleite, zincite and hydrozincite. It is named after Werner Simon and Kurt Kolle, Mineral...
Losev, who in 1922 discovered negative differential resistance in biased zincite (zinc oxide) point contact junctions. He used these to build solid-state...
galaxite, manganosite, pyrochroite, rhodochrosite, tephroite, willemite, and zincite. In 1960, Mayumi Yoshinaga was investigating alleghanyite and other manganese...
the growth rate. For example, the growth rate for sapphire (Al2O3) and zincite (ZnO) in potassium-containing solution (KOH, K2CO3) is higher in comparison...
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