Wednesday, March 7, 2012

Where to get Bismuth(III) iodide?

Bismuth(III) iodide is the asleep admixture with the blueprint BiI3. This gray-black solid is the artefact of the acknowledgment of bismuth(III) and iodide, which already was of absorption in qualitative asleep analysis.
Bismuth(III) iodide adopts a characteristic clear structure, with iodide centres application a hexagonally closest-packed lattice, and bismuth centres application either one-third or two-thirds of the octahedral holes (alternating by layer).
Bismuth(III) iodide forms aloft heating an affectionate admixture of iodine and bismuth powder:2Bi + 3I2 → 2BiI3
BiI3 can aswell be fabricated by the acknowledgment of bismuth oxide with aqueous hydroiodic acid:
Bi2O3(s) + 6HI(aq) → 2BiI3(s) + 3H2O(l)
Since bismuth(III) iodide is baffling in water, an aqueous band-aid can be activated for the attendance of Bi3+ ions by abacus a antecedent of iodide such as potassium iodide. A atramentous accelerate of bismuth(III) iodide indicates a absolute test.
Bismuth(III) iodide forms iodobismuth(III) anions if advised with halide donors:2 NaI + BiI3 → Na2[BiI5]
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