...). The crystal structure, solved and refined from single-crystal X-ray diffraction data ( R 1 = 0.042), is based on a double sheet of tetrahedra (T) and a sheet of octahedra (O) that alternate along the [010] direction forming a TOT structure typical for members of the rhodesite mero-plesiotype series...

...− , H 2 O) octahedra that form infinite sheets on (001). Alternating T and O layers give rise to a TOT topology reminiscent of that observed in micas and characteristic of minerals, including rhodesite, delhayelite, hydrodelhayelite, and monteregianite-(Y), with which melansonite shares a crystal...

...Marcella Cadoni; Giovanni Ferraris Abstract Two new members of the mero-plesiotype rhodesite series (KCa 2 Na[Si 8 O 19 ]·5H 2 O, abbreviated as TR03; a 6.5850, b 23.776, c 7.0250 Å; Pn 2 1 m ; and KNa 3 Sr[Si 8 O 19 ] ·4.3H 2 O, TR04; a 6.5699, b 23.7225, c 7.0225 Å, β 91.81°; P 2 1 / m ) have...

... module is kept constant, a second (third, etc.) module is peculiar of each member. A series is said to be plesiotype when all members share modules that, however, may still slightly differ in chemistry and configuration: see the mero-plesiotype series of bafertisite and rhodesite described later...

... compounds belonging to the rhodesite group. Abstract La seidite-(Ce), Na 4 (Ce,Sr) 2 {Ti(OH) 2 (Si 8 O 18 )}(O,OH,F) 4 ·5H 2 O, est un titanosilicate découvert récemment dans la pegmatite de Yubileynaya, au mont Karnasurt, complexe alcalin de Lovozero, péninsule de Kola, en Russie. Les grains sont des...

...Richard A. Sheppard; Arthur J. Gude, 3rd Abstract Rhodesite occurs as aggregates of radiating white, silky fibers associated with magadiite and trioctahedral montmorillonite in an altered silicic lava. Indices of refraction are α = 1.501±0.001 and γ=1.513 ± 0.001. A least-squares refinement of X...

... microscopy (TEM), and energy dispersive X-ray analysis (EDX). Changes in chemical composition and pH value of solutions during the reactions were also measured. As the pH of reacting solutions was increased, smectite, phillipsite and rhodesite crystallized progressively in NaOH solutions, while smectite...

...Fig. 2. Silicate layer formed by 4- and 8-membered rings in the structure of shlykovite (a), mountainite (b) and rhodesite (c). ...

...Marcella Cadoni; Giovanni Ferraris Abstract The crystal structure of a new orthorhombic-type labuntsovite with composition Na 5.36 Ti 4 (Si 4 O 12 ) 2 (O 0.34 OH 0.66 ) 4 · 10.31H 2 O, obtained as side product of hydrothermal runs devoted to the synthesis of rhodesite-type microporous silicates...