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Zinkenite is a steel-gray metallic sulfosalt mineral composed of lead antimony sulfide Pb 9 Sb 22 S 42.Zinkenite occurs as acicular needle-like crystals. [2]It was first described in 1826 for an occurrence in the Harz Mountains, Saxony-Anhalt, Germany and named after its discoverer, German mineralogist and mining geologist, Johann Karl Ludwig Zinken (1790–1862).
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 .
At first glance, it is hard to differentiate boulangerite from zinkenite or jamesonite, so proper equipment is crucial for the identification. In the structure, there are interconnected SbS 3 groups like in zinkenite, jamesonite and robinsonite. [3] The smaller, and beautiful needle-like crystals attract a lot of collector's glimpses.
Andorite is a sulfosalt mineral with the chemical formula PbAgSb 3 S 6.. It was first described in 1892 for an occurrence in the Baia Sprie mine, Baia Sprie, in what is now Maramureș County, Romania, and named for Hungarian amateur mineralogist Andor von Semsey (1833–1923).
See also External links A Abelsonite: C 31 H 32 N 4 Ni – American physicist Philip Hauge Abelson (1913–2004) Abswurmbachite: Cu 2+ Mn 3+ 6 O 8 SiO 4 – German mineralogist Irmgard Abs-Wurmbach (1938–2020) Adamite: Zn 2 AsO 4 OH – French mineralogist Gilbert Joseph Adam (1795–1881) Agrellite: NaCa 2 Si 4 O 10 F – English optical mineralogist Stuart Olof Agrell (1913–1996 ...
Crystallization is the process by which solids form, where the atoms or molecules are highly organized into a structure known as a crystal.Some ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas.
In the naming of inorganic compounds, "-zincate" is a suffix that indicates that a polyatomic anion contains a central zinc atom. Examples include tetrachlorozincate, ZnCl 4 2−, the tetrahydroxozincate, Zn(OH) 4 2− and tetranitratozincate, Zn(NO 3) 4 2−.
Crystal malts are available in a range of colors, with darker-colored crystal malts kilned at higher temperatures producing stronger, more caramel-like overtones. Some of the sugars in crystal malts caramelize during kilning and become unfermentable. Hence, adding crystal malt increases the final sweetness of a beer. They contain no enzymes.