Information card for entry 9002340

Structure parameters

• Mineral name: Peprossiite-(Ce)
• Formula: Al2 B3.868 Ca0.102 O10.667 Pr0.818 Si0.132
• Calculated formula: Al2.00001 B3.868 Ca0.102 O10.6667 Pr0.818 Si0.132
• Title of publication: The crystal structure of peprossiite-(Ce), and anhydrous REE and Al mica-like borate with square-pyramidal coordination for Al Sample: Pep1
• Authors of publication: Callegari, A.; Caucia, F.; Mazzi, F.; Oberti, R.; Ottolini, L.; Ungaretti, L.
• Journal of publication: American Mineralogist
• Year of publication: 2000
• Journal volume: 85
• Pages of publication: 586 - 593
• a: 4.612 Å
• b: 4.612 Å
• c: 9.374 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 172.677 ų
• Number of distinct elements: 6
• Space group number: 189
• Hermann-Mauguin space group symbol: P -6 2 m
• Hall space group symbol: P -6 -2
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No