Tetrahedral-atom 3-ring groupings in one-dimensional inorganic chains: Be2AsO4OH-4H2O and Na2ZnPO4OH-7H2O. Technical report, 1 June 1992-31 May 1993
The zeolitic MXO4-based framework (M = Zn, Be, X = P, As) structure field has recently been shown to be a very extensive one by ourselves and others. A seemingly general feature of these new zeolitic (Zn/Be,P/As,O)-framework phases is a preference for a 1:1 M to X ratio and strict alternation of MO4 and XO4 tetrahedra, akin to a Lowenstein's rule Al-O-Al avoidance and consequent Si/Al Tetrahedral alternation for 1:1 Si to Al ratio aluminosilicate phases. This feature would appear to militate against Zn/Be,P/As,O molecular sieves with odd- as opposed to even-membered ring systems, and also against phases whose M:X ratio is non-unity. The authors describe the preparations, structures and properties of two new phases; a zincophosphate, Na2ZnPO4OH(dot)7H2O (NaZnPO), and a berylloarsenate, Be2AsO4OH(dot)4H2O (BeAsO), which are non-zeolitic, but contain 1-dimensional chains, whose building blocks include tetrahedral 3-rings.
- Research Organization:
- California Univ., Santa Barbara, CA (United States). Dept. of Chemistry
- OSTI ID:
- 6429677
- Report Number(s):
- AD-A-262670/3/XAB; T-5; CNN: N00014-90-J-1159
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structure of dehydrated Zn{sup 2+}-exchanged zeolite X. Overexchange, framework dealumination and reorganization, stoichiometric retention of monomeric tetrahedral aluminate
Synthesis of fully dehydrated fully Zn{sup 2+}-exchanged zeolite Y and its crystal structure determined by pulsed-neutron diffraction
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BERYLLIUM COMPOUNDS
CHEMICAL PREPARATION
ZEOLITES
CRYSTAL STRUCTURE
ZINC PHOSPHATES
ALUMINIUM SILICATES
ARSENATES
CHEMICAL BONDS
CRYSTALLOGRAPHY
MOLECULAR SIEVES
MOLECULAR STRUCTURE
MORDENITE
POROSITY
SODIUM COMPOUNDS
ADSORBENTS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SYNTHESIS
ZINC COMPOUNDS
665000* - Physics of Condensed Matter- (1992-)
400201 - Chemical & Physicochemical Properties