Add time:07/12/2019         Source:sciencedirect.com

The lead hydrogen arsenite chloride precipitates (Pb2(HAsO3)Cl2) are synthesized hydrothermally due to its structure trap for lead and arsenic. The synthetic precipitates have well-developed crystalline. The crystals of lead hydrogen arsenite chloride have a series of obvious IR bands at 790, 721, 645, 589 and 554 cm−1. These bands are assigned to the Ag mode of As–O stretching vibration (790), the antisymmetric stretch of As–OH (721), Ag modes (554 and 589) and E1g (645) of the symmetric deformation (ν1 and ν3) of AsO3 unit. The Raman bands at 782, 723, 586, 559 cm−1 are attributed to As–O stretching vibration (ν1) and the symmetric deformation (ν1 and ν3), of which the positions and assignments display in accordance with IR result. The most intense Raman band is found in 814 cm−1 and is attributed to the Ag mode of ν1 symmetric stretching vibration of AsO3 unit, which is not active in IR. The SEM image shows that the precipitates have needle morphology.

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