title: [Validation of the crystal structure of medicinal realgar in China].
abstract: The crystal structure of medicated realgar in China was validated as alpha-As4 S4 by X-ray diffraction and Raman spectroscopy in the present paper. Ten batches of medicinal realgar were analyzed including realgar ore, medicinal realgar powder, and prepared Chinese medicine. Identification of two As4 S4 polymorphs confirmed that the crystal structure of medicated realgar in China is alpha-As4 S4. Studies on 18 batches of preparative realgar powder showed that processing of realgar can not change the crystal structure of realgar.
authors.affiliation: Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China. zzjtcm@126.com
authors.forename: Zhi-Jie
authors.initials: ZJ
authors.lastname: Zhang
authors.forename: Qun
authors.initials: Q
authors.lastname: Zhou
authors.forename: Jing-Zhi
authors.initials: JZ
authors.lastname: Wei
authors.forename: Yan-Ling
authors.initials: YL
authors.lastname: Zhang
authors.forename: Su-Qin
authors.initials: SQ
authors.lastname: Sun
authors.forename: Lu-Qi
authors.initials: LQ
authors.lastname: Huang
authors.forename: Si-Tong
authors.initials: ST
authors.lastname: Yuan
mesh_terms: D001152:Arsenicals / Q000737:chemistry*; D002681:China; D013059:Spectrum Analysis, Raman; D013440:Sulfides / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D001152:Arsenicals; D013440:Sulfides; C058317:arsenic disulfide