Information card for entry 9017306

Structure parameters

• Mineral name: Orthoclase
• Formula: Al0.97 Ba0.005 Ca0.009 K0.931 Na0.055 O8 Si3.03
• Calculated formula: Al3.88 Ba0.02 Ca0.036 K3.724 Na0.22 O32 Si12.12
• Title of publication: The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Note: Sample P2A
• Authors of publication: Dal Negro, A.; De Pieri, R.; Quareni, S.
• Journal of publication: Acta Crystallographica, Section B
• Year of publication: 1978
• Journal volume: 34
• Pages of publication: 2699 - 2707
• a: 8.583 Å
• b: 12.988 Å
• c: 7.202 Å
• α: 90°
• β: 116.05°
• γ: 90°
• Cell volume: 721.29 ų
• Number of distinct elements: 7
• Space group number: 2
• Hermann-Mauguin space group symbol: C -1
• Hall space group symbol: -C 1
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No