Information card for entry 9015680

Structure parameters

• Mineral name: Beryl
• Formula: Al1.9 Be3 Cr0.1 O18 Si6
• Calculated formula: Al3.8 Be6 Cr0.2 O36 Si12
• Title of publication: Structural refinement of hydrous and anhydrous synthetic beryl, Al2(Be3Si6)O18 and emerald, Al1.9Cr0.1(Be3Si6)O18 Note: anhydrous emerald
• Authors of publication: Gibbs, G. V.; Breck, D. W.; Meagher, E. P.
• Journal of publication: Lithos
• Year of publication: 1968
• Journal volume: 1
• Pages of publication: 275 - 285
• a: 9.219 Å
• b: 9.219 Å
• c: 9.198 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 677.005 ų
• Number of distinct elements: 5
• Space group number: 192
• Hermann-Mauguin space group symbol: P 6/m c c
• Hall space group symbol: -P 6 2c
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No