"[E89FD2AEA6C9]" . "Inversion twinning in troilite"@en . "Inversion twinning in troilite" . . . "91" . . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "Inversion twinning in troilite"@en . "RIV/67985831:_____/06:00051347!RIV07-GA0-67985831" . . "The crystal structure of troilite from chondrites Etter and Georgetown and a troilite analog synthesized by sulfurization of an iron wire was refined using single-crystal X-ray data. Troilite is known to be hexagonal, with space group P-62c, which is non-centrosymmetric, allowing two non-identical inversely related spatial arrangements of atoms within the unit cell. All three samples represent the so-called inversion twins. They contain both inversely related atomic orientations instead of a single atomic arrangement. The inversion twinning may have developed as a result of a phase transition from the ideal centrosymmetric NiAs-type structure to troilite-type structure during cooling. In addition, all samples were found to be cation-deficient. The departure from ideal stoichiometry-up to almost 3.5 rel% of metal atoms are missing-is also possibly related to atomic ordering when the crystals cooled."@en . "5-6" . . . . "P(GA203/99/M037), P(GA205/02/1101), P(GA205/05/0459), Z(AV0Z30130516)" . . . "1"^^ . . . "3"^^ . "American Mineralogist" . . "5"^^ . "Dr\u00E1bek, M." . . . "480324" . "Inversion twinning in troilite" . . . "Inverzn\u00ED dvoj\u010Dat\u011Bn\u00ED v troilitu"@cs . "0003-004X" . "Cisa\u0159ov\u00E1, I." . "troilite; absolute structure; crystallography; iron monosulfide; iron meteorites"@en . "917;921" . "Sk\u00E1la, Roman" . . . . "Inverzn\u00ED dvoj\u010Dat\u011Bn\u00ED v troilitu"@cs . "The crystal structure of troilite from chondrites Etter and Georgetown and a troilite analog synthesized by sulfurization of an iron wire was refined using single-crystal X-ray data. Troilite is known to be hexagonal, with space group P-62c, which is non-centrosymmetric, allowing two non-identical inversely related spatial arrangements of atoms within the unit cell. All three samples represent the so-called inversion twins. They contain both inversely related atomic orientations instead of a single atomic arrangement. The inversion twinning may have developed as a result of a phase transition from the ideal centrosymmetric NiAs-type structure to troilite-type structure during cooling. In addition, all samples were found to be cation-deficient. The departure from ideal stoichiometry-up to almost 3.5 rel% of metal atoms are missing-is also possibly related to atomic ordering when the crystals cooled." . "RIV/67985831:_____/06:00051347" . . "Z monokrystalov\u00FDch rtg. difrak\u010Dn\u00EDch dat byly zp\u0159esn\u011Bny krystalov\u00E9 struktury troilit\u016F z chondrit\u016F Etter a Georgetown a analogu troilitu syntetizovan\u00E9ho sulfurizac\u00ED \u017Eelezn\u00E9ho dr\u00E1tu. V\u0161echny vzorky p\u0159edstavuj\u00ED tzv. inverzn\u00ED dvoj\u010Data. Dvoj\u010Dat\u011Bn\u00ED vzniklo v d\u016Fsledku f\u00E1zov\u00E9ho p\u0159echodu z ide\u00E1ln\u00ED centrosymetrick\u00E9 struktury typu NiAs b\u011Bhem chladnut\u00ED. Nav\u00EDc v\u0161echny vzorky vykazuj\u00ED deficit kovov\u00FDch atom\u016F a\u017E do 3.5 rel%."@cs .