Information card for entry 9011632

Structure parameters

• Common name: Helium
• Mineral name: Helium
• Formula: He
• Calculated formula: He
• SMILES: [He]
• Title of publication: Structure of the alpha and beta forms of solid He Sample: at T = 3.3 K & P = .018 GPa Note: structure known as the beta form
• Authors of publication: Schuch, A. F.; Grilly, E. R.; Mills, R. L.
• Journal of publication: Physical Review
• Year of publication: 1958
• Journal volume: 110
• Pages of publication: 775 - 775
• a: 3.46 Å
• b: 3.46 Å
• c: 5.6 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 58.059 ų
• Ambient diffraction temperature: 3.3 K
• Ambient diffracton pressure: 18000 kPa
• Number of distinct elements: 1
• Space group number: 194
• Hermann-Mauguin space group symbol: P 63/m m c
• Hall space group symbol: -P 6c 2c
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No