OD (order-disorder) character of the crystal structure of godlevskite Ni9S8

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Stefano Merlino, Emil Makovicky

Godlevskite Ni9S8 has been found to be an OD (order-disorder) structure consisting of two kinds of OD layers in strict alternation; these layers display stacking disorder. They have layer symmetries P(Formula)2m and P212(2), respectively (symmetry elements in parentheses are perpendicular to OD layers). Two structures with maximum degree of order (MDO polytypes), with space-group symmetries A222 and I4122, respectively, exist, together with more complex polytypes or disordered sequences. The OD character is in keeping with the frequent twinning of godlevskite.
TidsskriftEuropean Journal of Mineralogy
Sider (fra-til)863-869
StatusUdgivet - 2009

ID: 15998175