Information card for entry 9011636

Structure parameters

• Common name: Helium
• Mineral name: Helium
• Formula: He
• Calculated formula: He
• SMILES: [He]
• Title of publication: New allotropic form of He3 Sample: at T = 18.76 K & P = .171 GPa
• Authors of publication: Schuch, A. F.; Mills, R. L.
• Journal of publication: Physical Review Letters
• Year of publication: 1961
• Journal volume: 6
• Pages of publication: 596 - 597
• a: 4.242 Å
• b: 4.242 Å
• c: 4.242 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 76.333 ų
• Ambient diffraction temperature: 18.76 K
• Ambient diffracton pressure: 171000 kPa
• Number of distinct elements: 1
• Space group number: 225
• Hermann-Mauguin space group symbol: F m -3 m
• Hall space group symbol: -F 4 2 3
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No