Information card for entry 9011306

Structure parameters

• Mineral name: Lopezite
• Formula: Cr2 K2 O7
• Calculated formula: Cr2 K2 O7
• Title of publication: Phase transitions in K~2~Cr~2~O~7~ and structural redeterminations of phase II
• Authors of publication: Weakley, T. J. R.; Ylvisaker, E. R.; Yager, R. J.; Stephens, J. E.; Wiegel, R. D.; Mengis, M.; Bauer, M. R.; Wu, P.; Photinos, P.; Abrahams, S. C.
• Journal of publication: Acta Crystallographica, Section B: Structural Science
• Year of publication: 2004
• Journal volume: 60
• Journal issue: 6
• Pages of publication: 705 - 715
• a: 7.3807 Å
• b: 7.4593 Å
• c: 13.391 Å
• α: 96.205°
• β: 98.033°
• γ: 90.914°
• Cell volume: 725.368 ų
• Cell temperature: 296 K
• Ambient diffraction temperature: 296 K
• Number of distinct elements: 3
• Space group number: 2
• Hermann-Mauguin space group symbol: P -1
• Hall space group symbol: -P 1
• Residual factor for all reflections: 0.036
• Residual factor for significantly intense reflections: 0.025
• Weighted residual factors for all reflections: 0.074
• Weighted residual factors for all reflections included in the refinement: 0.04
• Goodness-of-fit parameter for all reflections: 1.58
• Goodness-of-fit parameter for all reflections included in the refinement: 1.74
• Diffraction radiation wavelength: 0.71073 Å
• Diffraction radiation type: MoKα
• Duplicate of: 2102644
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No