Information card for entry 2108235

Structure parameters

• Mineral name: labradorite
• Formula: Al1.66 Ca0.66 Na0.34 O8 Si2.34
• Calculated formula: Al1.66 Ca0.66 Na0.34 O8 Si2.34
• Title of publication: Revisiting the <i>I</i>{øverline <b>1</b>} structures of high-temperature Ca-rich plagioclase feldspar ‒ a single-crystal neutron and X-ray diffraction study
• Authors of publication: Jin, Shiyun; Wang, Xiaoping; Xu, Huifang
• Journal of publication: Acta Crystallographica Section B
• Year of publication: 2018
• Journal volume: 74
• Journal issue: 2
• a: 8.1635 ± 0.0002 Å
• b: 12.8615 ± 0.0002 Å
• c: 14.1936 ± 0.0003 Å
• α: 93.5104 ± 0.0019°
• β: 116.124 ± 0.002°
• γ: 90.5297 ± 0.0013°
• Cell volume: 1334.41 ± 0.05 ų
• Cell temperature: 100 K
• Ambient diffraction temperature: 100 K
• Number of distinct elements: 5
• Space group number: 2
• Hermann-Mauguin space group symbol: I -1
• Hall space group symbol: -P 1 (-1/2*x+1/2*y+1/2*z,1/2*x-1/2*y+1/2*z,1/2*x+1/2*y-1/2*z)
• Residual factor for all reflections: 0.0813
• Residual factor for significantly intense reflections: 0.0751
• Weighted residual factors for significantly intense reflections: 0.254
• Weighted residual factors for all reflections included in the refinement: 0.2596
• Goodness-of-fit parameter for significantly intense reflections: 1.95
• Goodness-of-fit parameter for all reflections included in the refinement: 1.92
• Diffraction radiation probe: neutron
• Diffraction radiation type: neutron
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: Yes