Information card for entry 2002893

Structure parameters

• Formula: Al1.75 Na1.75 O4 Si0.25
• Calculated formula: Al0.07 Na0.372 O0.184 Si0.07
• Title of publication: Cristobalite-Related Phases in the NaAlO~2~‒NaAlSiO~4~ System. I. Two Tetragonal and Two Orthorhombic Structures
• Authors of publication: Thompson, John G; Withers, Ray L.; Melnitchenko, Alexandra; Palethorpe, Stephen R.
• Journal of publication: Acta Crystallographica Section B
• Year of publication: 1998
• Journal volume: 54
• Journal issue: 5
• Pages of publication: 531 - 546
• a: 10.416 ± 0.003 Å
• b: 14.25 ± 0.003 Å
• c: 5.2038 ± 0.0009 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 772.4 ± 0.3 ų
• Cell temperature: 293 K
• Ambient diffraction temperature: 293 K
• Number of distinct elements: 4
• Space group number: 61
• Hermann-Mauguin space group symbol: P b c a
• Hall space group symbol: -P 2ac 2ab
• Diffraction radiation wavelength: 1.5418 Å
• Diffraction radiation type: CuKα
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No