Crystal chemistry of double-ring silicates: structure of roedderite at 100 and 300 K
European Journal of Mineralogy Volume 1 Number 5 (1989), p. 715 - 718
published: Nov 16, 1989
manuscript accepted: Jun 9, 1989
manuscript received: Apr 17, 1989
ArtNo. ESP147050105010, Price: 29.00 €
Abstract X-ray single-crystal structure refinements on natural roedderite from Bellerberg (Eifel district, FRG), (Mg4.66Fe0.12Mn0.10T0.01)Na1.15K1.0Si12O30, lead to an ordered Na arrangement which reduces the space group from P6/mcc to P62c. All other structural positions maintain a P6/mcc pseudo-symmetry.