Bi2O2SO4, a new representative of the grandreefite structure typeстатья
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Дата последнего поиска статьи во внешних источниках: 28 февраля 2020 г.
Аннотация:Single-phase polycrystalline bismuth oxysulfate, Bi2O2SO4, has been prepared via low-temperature reaction between Bi2O2CO3 and (NH4)2SO4. The compound is monoclinic (C2/m, a = 14.1659(4) Å, b = 4.2344(1) Å, c = 8.2100(2) Å, β = 106.7201(8)°, V = 471.65(2) Å3) and isostructural to isoelectronic Pb2F2SO4 and to isolobal Ln2O2SO4. Upon heating, it decomposes at ∼550 °C into the Bi28O32(SO4)10 which is stable until ∼775 °C. DFT calculations predict it to be a wide-gap semiconductor.