Information card for entry 9007570

Structure parameters

• Mineral name: Tarapacaite
• Formula: Cr K2 O4
• Calculated formula: Cr K2 O4
• Title of publication: Redetermination of the structures of potassium sulphate and potassium chromate: the effect of electrostatic crystal forces upon observed bond length
• Authors of publication: McGinnety, J. A.
• Journal of publication: Acta Crystallographica, Section B
• Year of publication: 1972
• Journal volume: 28
• Pages of publication: 2845 - 2852
• a: 7.663 Å
• b: 10.388 Å
• c: 5.922 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 471.41 ų
• Number of distinct elements: 3
• Space group number: 62
• Hermann-Mauguin space group symbol: P n a m
• Hall space group symbol: -P 2c 2n
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No