Information card for entry 1000048

Structure parameters

• Chemical name: Dicalcium aluminium alumosilicate
• Mineral name: Gehlenite
• Formula: Al2 Ca2 O7 Si
• Calculated formula: Al2 Ca2 O7 Si
• Title of publication: Neutron Diffraction Study of the Akermanite-Gehlenite Solid Solution Series
• Authors of publication: Swainson, I P; Dove, M T; Schmahl, W W; Putnis, A
• Journal of publication: Physics and Chemistry of Minerals (Germany)
• Year of publication: 1992
• Journal volume: 19
• Pages of publication: 185 - 195
• a: 7.685 ± 0.0004 Å
• b: 7.685 ± 0.0004 Å
• c: 5.0636 ± 0.0003 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 299.1 ų
• Sample thermal history: annealed at 1250 C for 2 d
• Number of distinct elements: 4
• Space group number: 113
• Hermann-Mauguin space group symbol: P -4 21 m
• Hall space group symbol: P -4 2ab
• Residual factor for all reflections: 0.059
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No