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Bismuth dissolves in concentrated sulfuric acid to make bismuth(III) sulfate and sulfur dioxide. [34] 6 H 2 SO 4 + 2 Bi → 6 H 2 O + Bi 2 (SO 4) 3 + 3 SO 2. It reacts with nitric acid to make bismuth(III) nitrate (which decomposes into nitrogen dioxide when heated [39]). [40] Bi + 6 HNO 3 → 3 H 2 O + 3 NO 2 + Bi(NO 3) 3
The flux method is a crystal growth method where starting materials are dissolved in a solvent (flux), and are precipitated out to form crystals of a desired compound. The flux lowers the melting point of the desired compound, analogous to a wet chemistry recrystallization. [1]
Bismuth chloride (or butter of bismuth) is an inorganic compound with the chemical formula BiCl 3. It is a covalent compound and is the common source of the Bi 3+ ion. In the gas phase and in the crystal, the species adopts a pyramidal structure, in accord with VSEPR theory .
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Crystals of bismuth antimonides are synthesized by melting bismuth and antimony together under inert gas or vacuum. Zone melting is used to decrease the concentration of impurities. [ 4 ] When synthesizing single crystals of bismuth antimonides, it is important that impurities are removed from the samples, as oxidation occurring at the ...
The crystals are chiral (space group I23, or no. 197) with two Bi 12 Bi 0.8 O 19.2 formulas per unit cell. [4] δ-Bi 2 O 3 has a defective fluorite-type crystal structure in which two of the eight oxygen sites in the unit cell are vacant. [5] ε-Bi 2 O 3 has a structure related to the α- and β- phases but as the structure is fully ordered it ...
Bismuthinite is a mineral consisting of bismuth sulfide (Bi 2 S 3). It is an important ore for bismuth. The crystals are steel-grey to off-white with a metallic luster. It is soft enough to be scratched with a fingernail and rather dense. Bismuthinite forms a series with the lead, copper, bismuth mineral aikinite (Pb Cu Bi S 3). [4]