{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T05:41:38Z","timestamp":1774590098104,"version":"3.50.1"},"reference-count":11,"publisher":"Cambridge University Press (CUP)","issue":"4","license":[{"start":{"date-parts":[[2012,3,5]],"date-time":"2012-03-05T00:00:00Z","timestamp":1330905600000},"content-version":"unspecified","delay-in-days":3017,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Powder Diffr."],"published-print":{"date-parts":[[2003,12]]},"abstract":"<jats:p>\n                    New X-ray powder diffraction patterns for two cholesterol derivatives, cholest-4-ene-3,6-dione and cholest-4-en-3-one are reported in the range 0&lt;2\u03b8&lt;115\u00b0. Both compounds crystallize in similar monoclinic cells in space-group\n                    <jats:italic>P<\/jats:italic>\n                    2\n                    <jats:sub>1<\/jats:sub>\n                    , with unit cell parameters\n                    <jats:italic>a<\/jats:italic>\n                    =10.481(3) \u00c5,\n                    <jats:italic>b<\/jats:italic>\n                    =8.0354(8) \u00c5,\n                    <jats:italic>c<\/jats:italic>\n                    =14.677(3) \u00c5, \u03b2=105.265(7)\u00b0,\n                    <jats:italic>V<\/jats:italic>\n                    =1192.5(4) \u00c5\n                    <jats:sup>3<\/jats:sup>\n                    for C\n                    <jats:sub>27<\/jats:sub>\n                    H\n                    <jats:sub>42<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    , and\n                    <jats:italic>a<\/jats:italic>\n                    =10.703(2) \u00c5,\n                    <jats:italic>b<\/jats:italic>\n                    =7.8750(6) \u00c5,\n                    <jats:italic>c<\/jats:italic>\n                    =14.660(3) \u00c5, \u03b2=105.205(14)\u00b0,\n                    <jats:italic>V<\/jats:italic>\n                    =1192.4(4) \u00c5\n                    <jats:sup>3<\/jats:sup>\n                    for C\n                    <jats:sub>27<\/jats:sub>\n                    H\n                    <jats:sub>44<\/jats:sub>\n                    O. The patterns, confirmed by single-crystal studies, do not match the PDF 17-1144 and PDF 10-649. A fitting of the overall parameters was performed with Fullprof using the atomic parameters obtained from single-crystal studies.\n                  <\/jats:p>","DOI":"10.1154\/1.1633562","type":"journal-article","created":{"date-parts":[[2003,12,12]],"date-time":"2003-12-12T11:26:21Z","timestamp":1071228381000},"page":"306-308","source":"Crossref","is-referenced-by-count":3,"title":["Improved powder diffraction data for two cholesterol derivatives"],"prefix":"10.1154","volume":"18","author":[{"given":"Manuela","family":"Ramos Silva","sequence":"first","affiliation":[]},{"given":"Ana","family":"Matos Beja","sequence":"additional","affiliation":[]},{"given":"Jos\u00e9 Ant\u00f3nio","family":"Paixa\u02dco","sequence":"additional","affiliation":[]},{"given":"Ab\u00edlio J. F. N.","family":"Sobral","sequence":"additional","affiliation":[]},{"given":"Ana S. M.","family":"Ressurrei\u00e7\u00e3o","sequence":"additional","affiliation":[]},{"given":"A. M. d\u2019A.","family":"Rocha Gonsalves","sequence":"additional","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2012,3,5]]},"reference":[{"key":"S0885715600007387_par96","doi-asserted-by":"publisher","DOI":"10.1021\/jo960402i"},{"key":"S0885715600007387_raj01","first-page":"963","article-title":"Crystal Structure of Cholest-4-ene-3,6-dione: A steroid","volume":"46","author":"Rajnikant Gupta","year":"2001","journal-title":"Kristallografiya"},{"key":"S0885715600007387_rod90","unstructured":"Rodriguez-Carvajal, J. (1990). \u201cFullProf: A Program for Rietveld refinement and Pattern Matching Analysis,\u201d Collected Abstracts of Powder Diffraction Meeting, Toulouse, France, July 1990, pp. 127\u2013129."},{"key":"S0885715600007387_smi73","doi-asserted-by":"publisher","DOI":"10.1021\/jo00949a041"},{"key":"S0885715600007387_bow53","unstructured":"Bowers A. , Halsall T. G. , Jones E. R. H. , and Lemin A. J. (1953). \u201cThe Chemistry of the Triterpenes and Related Compounds. Part. XVIII. Elucidation of the Structure of Polyporenic Acid C,\u201d J. Chem. Soc. 2548\u20132560."},{"key":"S0885715600007387_she76","doi-asserted-by":"publisher","DOI":"10.1107\/S0567740876006936"},{"key":"S0885715600007387_kul73","doi-asserted-by":"publisher","DOI":"10.1021\/jo00960a050"},{"key":"S0885715600007387_bro71","doi-asserted-by":"publisher","DOI":"10.1021\/jo00802a005"},{"key":"S0885715600007387_soc95","doi-asserted-by":"publisher","DOI":"10.1107\/S0108270194008541"},{"key":"S0885715600007387_mar01","doi-asserted-by":"publisher","DOI":"10.1080\/02678290110041991"},{"key":"S0885715600007387_och97","doi-asserted-by":"publisher","DOI":"10.1016\/S1011-1344(96)07428-3"}],"container-title":["Powder Diffraction"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0885715600007387","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T14:59:21Z","timestamp":1768489161000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0885715600007387\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2003,12]]},"references-count":11,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2003,12]]}},"alternative-id":["S0885715600007387"],"URL":"https:\/\/doi.org\/10.1154\/1.1633562","relation":{},"ISSN":["0885-7156","1945-7413"],"issn-type":[{"value":"0885-7156","type":"print"},{"value":"1945-7413","type":"electronic"}],"subject":[],"published":{"date-parts":[[2003,12]]}}}