{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T07:26:23Z","timestamp":1773818783335,"version":"3.50.1"},"reference-count":22,"publisher":"Mineralogical Society","issue":"1","license":[{"start":{"date-parts":[[2018,7,5]],"date-time":"2018-07-05T00:00:00Z","timestamp":1530748800000},"content-version":"unspecified","delay-in-days":3441,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Mineral. mag."],"published-print":{"date-parts":[[2009,2]]},"abstract":"<jats:p>Mavlyanovite, ideally Mn<jats:sub>5<\/jats:sub>Si<jats:sub>3<\/jats:sub>, is a new mineral from a lamproite diatreme close to the upper reaches of the Koshmansay river, Chatkal ridge, Uzbekistan. It occurs together with unnamed manganese siliciphosphide and manganese silicicarbide minerals in round to ovoid segregations, up to 10 cm in diameter, in volcanic glass. Segregations of hexagonal prismatic mavlyanovite up to 1\u20132 mm occur in interstices in the matrix and tiny inclusions (1\u20132 \u03bcm) of alabandite and khamrabaevite occur within mavlyanovite. It is opaque with a metallic lustre, has a dark-grey streak, is brittle with a conchoidal fracture and a near-perfect basal cleavage. VHN<jats:sub>100<\/jats:sub> is 1029\u20131098 kg\/mm<jats:sup>2<\/jats:sup> (Mohs hardness ~7). In plane-polarized reflected light, mavlyanovite is a pale-brownish-grey against the accompanying unnamed manganese silicicarbide (white). Reflectance values and colour data are tabulated. Average results of 19 electronmicroprobe analyses give Mn70.84, Fe 6.12, Si 22.57, Ti 0.15, P 0.18, total 99.86 wt.% leading to an empirical formula of (Mn<jats:sub>4.66<\/jats:sub>Fe<jats:sub>0.40<\/jats:sub>)<jats:sub>5.06<\/jats:sub>(Si<jats:sub>2.91<\/jats:sub>Ti<jats:sub>0.01<\/jats:sub>P<jats:sub>0.02<\/jats:sub>)<jats:sub>2.94<\/jats:sub> based on8 a.p.f.u. The calculated density is 6.06 g\/cm<jats:sup>3<\/jats:sup>, (on the basis of the empirical formula and unit-cell parameters from the structure determination). Mavlyanovite is hexagonal (P6<jats:sub>3<\/jats:sub>\/mcm) with a 6.8971(7), c 4.8075(4) \u00c5, V 198.05(3) \u00c5<jats:sup>3<\/jats:sup> and Z = 2. The structure has been determined and refined to R<jats:sub>1<\/jats:sub> = 0.017, wR<jats:sub>2<\/jats:sub> = 0.044, GoF = 1.16. Mavlyanovite is the naturally-occurring analogue of synthetic Mn<jats:sub>5<\/jats:sub>Si<jats:sub>3<\/jats:sub> which is the parent aristotype structure of the Nowotny intermetallic phases studied extensively by the material-science community. It is also the Mn-dominant analogue of xifengite Fe<jats:sub>5<\/jats:sub>Si<jats:sub>3<\/jats:sub>. The mineral name honours Academician Gani Arifkhanovich Mavlyanov (1910\u20131988), for his contributions to the understanding of the geology of Uzbekistan.<\/jats:p>","DOI":"10.1180\/minmag.2009.073.1.43","type":"journal-article","created":{"date-parts":[[2009,6,7]],"date-time":"2009-06-07T23:47:07Z","timestamp":1244418427000},"page":"43-50","source":"Crossref","is-referenced-by-count":15,"title":["Mavlyanovite, Mn<sub>5<\/sub>Si<sub>3<\/sub>: a new mineral species from a lamproite diatreme, Chatkal Ridge, Uzbekistan"],"prefix":"10.1180","volume":"73","author":[{"given":"R. G.","family":"Yusupov","sequence":"first","affiliation":[]},{"given":"C. J.","family":"Stanley","sequence":"additional","affiliation":[]},{"given":"M. D.","family":"Welch","sequence":"additional","affiliation":[]},{"given":"J.","family":"Spratt","sequence":"additional","affiliation":[]},{"given":"G.","family":"Cressey","sequence":"additional","affiliation":[]},{"given":"M. S.","family":"Rumsey","sequence":"additional","affiliation":[]},{"given":"R.","family":"Seltmann","sequence":"additional","affiliation":[]},{"given":"E.","family":"Igamberdiev","sequence":"additional","affiliation":[]}],"member":"7149","published-online":{"date-parts":[[2018,7,5]]},"reference":[{"key":"S0026461X00005090_ref21","first-page":"231\u2014238","volume":"3","author":"Yu","year":"1984","journal-title":"Acta Petrologica Mineralogica et Analytica"},{"key":"S0026461X00005090_ref7","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889899006020"},{"key":"S0026461X00005090_ref9","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889895014920"},{"key":"S0026461X00005090_ref14","first-page":"112\u2014122","volume":"64","author":"Sheldrick","year":"2008","journal-title":"Acta Crystallographica A"},{"key":"S0026461X00005090_ref8","first-page":"1116\u20141121","volume":"77","author":"Jambor","year":"1992","journal-title":"American Mineralogist"},{"key":"S0026461X00005090_ref3","doi-asserted-by":"publisher","DOI":"10.1107\/S0108270186093253"},{"key":"S0026461X00005090_ref17","first-page":"111\u2014121","author":"Stanley","year":"1998","journal-title":"Modern Approaches to Ore and Environmental Mineralogy"},{"key":"S0026461X00005090_ref22","first-page":"83\u201492","volume":"31","author":"Yusupov","year":"1993","journal-title":"Geochemistry International"},{"key":"S0026461X00005090_ref4","first-page":"639\u2014642","volume-title":"Mineral Deposits: Processes to Processing","volume":"2","author":"Djuraev","year":"1999"},{"key":"S0026461X00005090_ref11","author":"Nakamura-Messenger","year":"2008","journal-title":"Lunar and Planetary Science"},{"key":"S0026461X00005090_ref6","author":"Errandonea","year":"2008","journal-title":"Physical Review B"},{"key":"S0026461X00005090_ref1","first-page":"273","volume":"48","author":"\u00c5mark","year":"1936","journal-title":"Svensk Kemisk Tidskrift"},{"key":"S0026461X00005090_ref20","unstructured":"Woolley, A.R and Kjarsgaard, B.A. (2008) Carbonatite occurrences of the world: map and database; Geological Survey of Canada, Open File 5796, 2008; 28 pages (1 sheet) http:\/\/geopub.nrcan.gc.ca\/ moreinfo_e.php?id=225115"},{"key":"S0026461X00005090_ref18","first-page":"35\u201443","author":"Tatarintsev","year":"1990","journal-title":"Mineralogichesky Zhurnal,"},{"key":"S0026461X00005090_ref15","first-page":"701\u2014705","volume":"34","author":"Shoemaker","year":"1978","journal-title":"Acta Crystallographica B"},{"key":"S0026461X00005090_ref19","doi-asserted-by":"publisher","DOI":"10.1016\/j.lithos.2005.03.018"},{"key":"S0026461X00005090_ref16","first-page":"541\u2014547","volume":"31","author":"Spinat","year":"1975","journal-title":"Acta Crystallographica B"},{"key":"S0026461X00005090_ref5","doi-asserted-by":"publisher","DOI":"10.1134\/S0016702906070093"},{"key":"S0026461X00005090_ref2","doi-asserted-by":"publisher","DOI":"10.3891\/acta.chem.scand.14-1414"},{"key":"S0026461X00005090_ref12","first-page":"179\u2014220","volume-title":"Electronic Structure and Alloy Chemistry of the Transition Elements","author":"Nowotny","year":"1963"},{"key":"S0026461X00005090_ref13","doi-asserted-by":"publisher","DOI":"10.1107\/S0365110X6500484X"},{"key":"S0026461X00005090_ref10","first-page":"451\u2014464","volume":"45","author":"Lutkov","year":"2007","journal-title":"Geochemistry International"}],"container-title":["Mineralogical Magazine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0026461X00005090","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,2,4]],"date-time":"2021-02-04T11:20:22Z","timestamp":1612437622000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0026461X00005090\/type\/journal_article"},"secondary":[{"URL":"http:\/\/minmag.geoscienceworld.org\/cgi\/doi\/10.1180\/minmag.2009.073.1.43","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,2]]},"references-count":22,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2009,2]]}},"alternative-id":["S0026461X00005090"],"URL":"https:\/\/doi.org\/10.1180\/minmag.2009.073.1.43","relation":{},"ISSN":["0026-461X","1471-8022"],"issn-type":[{"value":"0026-461X","type":"print"},{"value":"1471-8022","type":"electronic"}],"subject":[],"published":{"date-parts":[[2009,2]]}}}