Open AccessTHE CRYSTAL STRUCTURE OF ARMILLARINE
Author(s) -
Cun-Heng He,
Chao Xu,
Bao Guang-Hong,
Mu Shan-Tian
Publication year - 1982
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.31.832
Subject(s) - diffractometer , crystal structure , crystal (programming language) , physics , fourier transform , unit (ring theory) , materials science , crystallography , optics , mathematics , quantum mechanics , chemistry , computer science , programming language , mathematics education
The Armillarine (C24H30O6) crystal belongs to the orthorhomcic system with space group P21 21 21 and unit cell parameter α= 18.784(9)?, b = 14.002(7)?, c = 8.598(5)?, z= 4. The calculated density Dc= 1.216 g· cm-3.The intensity data were collected on the Philips PW-1100 diffractometer. The structure was determined by MULTAN-80 with the statistically weighted tangent formula after MULTAN-78 had been proved unsuccessful. The structure has been refined by full-matrix least-squares method to a final R value of 0.076 for 1624 reflexions. The hydrogen atom locations were determined by difference Fourier synthesis.