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An X-ray diffraction refinement of the crystal structure of natural orthorhombic analcime (NaAlSi2O6·H2O)

1988; Elsevier BV; Volume: 8; Issue: 3 Linguagem: Inglês

10.1016/s0144-2449(88)80316-6

1873-3115

F. Pechar,

Mesoporous Materials and Catalysis

An X-ray diffraction analysis was performed on a single crystal of natural orthorhombic analcime: (Na0.96K0.06 Ca0.06) [(Al0.95Fe0.02Si2.05Ti0.01)O6]·1.12 H2O; lbca: a = 13.720(2) Å, b = 13.715(2) Å, c = 13.709(1) Å; V = 2579.8 Å3; Z = 16 (locality: Vlčí Hora, Bohemia). Refinement of 1340 independent reflections yields R = 0.032. The mean Si(Al)-0 distance is 1.6467 Å, and the angle is 109.49°. The framework of orthorhombic analcime is topologically the same as cubic modification.