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Arsenic-bismuth
Eulytine ( from , fusible, easily dissolved) or ''bismuth blende'' (obsolete)''August Breithaupt, Breithaupt A. and Carl Julius Fritzsche, Fritzsche C.'' (1849). Annalen der Physik, Halle, Leipzig: s. 228. is one of the rarest minerals in nature. The composition is bismuth silicate with the calculation formula Bi4(SiO4)3 or Bi4Si3O12. The mineral forms isometric cubic crystals up to 2 mm in size, the supporting form of which is a tetrahedron or tristetrahedron. Among the varieties, there are also often concentric, fibrous or spherical aggregates of a very impressive appearance, which were previously called agricolites. Eulytine is a secondary mineral, a product of the oxidation of bismuth and its compounds.''Vladimir Vernadsky'' Collected works d 24; edited by academician Erik Galimov. — Moscow: Science, 2013 г. — Volume 2. Experience in descriptive mineralogy (1908–1914) — 572 p. Discovery history and name The history of the discovery of the mineral is complex and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bismuth
Bismuth is a chemical element; it has symbol Bi and atomic number 83. It is a post-transition metal and one of the pnictogens, with chemical properties resembling its lighter group 15 siblings arsenic and antimony. Elemental bismuth occurs naturally, and its sulfide and oxide forms are important commercial ores. The free element is 86% as dense as lead. It is a brittle metal with a silvery-white color when freshly produced. Surface oxidation generally gives samples of the metal a somewhat rosy cast. Further oxidation under heat can give bismuth a vividly iridescent appearance due to thin-film interference. Bismuth is both the most diamagnetic element and one of the least thermally conductive metals known. Bismuth was formerly understood to be the element with the highest atomic mass whose nuclei do not spontaneously decay. However, in 2003 it was found to be very slightly radioactive. The metal's only primordial isotope, bismuth-209, undergoes alpha decay with a half-l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
