Zeolite-Type Crystal Structures and their Chemistry. by W.H. Baur, R.X. Fischer

By W.H. Baur, R.X. Fischer

Zeolites and zeolite-like fabrics turned vital as a result of their ion alternate capacities and their remarkable catalytic homes. hundreds of thousands of hundreds zeolites were produced some time past years for the oil refining by myself and, in even higher amounts, as ion-exchanging softening brokers for detergents. quite a few different purposes, e.g., in environmental safety, farming, fuel separation, drugs, and pharmacy, are identified, making zeolites virtually a need for way of life. for this reason, there are numerous study actions facing zeolite homes and characterization. despite the fact that, a strictly systematic description of zeolite-type crystal constructions used to be no longer on hand yet is now offered during this sequence of volumes. it truly is designed as a reference paintings for zeolite chemists and fabrics scientists, however it additionally serves as a device to interpret structural similarities and to derive new buildings from recognized topologies.

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Landolt-Börnstein New Series IV/14 Ref. p. 2 Selected interatomic distances and angles for USCB-3GaGe, (C2H10N2)8Ga16Ge16O64 (DFT1998a02, 98Bu1). 1 Chemical composition D He H Li Be B C N O F Ne Na Mg Al Si S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba L Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra A La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr P Zn Ga Ge As Fig. 1 Chemical elements (highlighted) occurring in DFT-type compounds.

1 Atomic coordinates and site definitions for DAF-2, (C2H10N2)16Co32P32O128 (DFT1994a01, 94Che1). Wyckoff no. 6(7) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8(f) 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 Landolt-Börnstein New Series IV/14 Ref.

52 centered around 4 symmetry elements, thus creating separate 4-rings of Ge4O12 and Ga4O12 composition with Ge-O-Ge and Ga-O-Ga bridges. 1 type structure all lov units are located on 42 symmetry elements, thus allowing a regular alternation of Ge and Ga within the framework. 3 type structure only one half of the lov units have 42 symmetry. Most likely the wrong space group symmetry has been chosen in [98Bu1] to model the structure of the supercell. 2 Fig. 3 The Bärnighausen tree illustrating the symmetry relationship of the DFT types.

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