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Helium |
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Wyckoff R W G |
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Crystal Structures 1 (1963) 7-83 |
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Second edition. Interscience Publishers, New York, New York |
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Sample at T = 2 K |
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Hexagonal closest packed, hcp, structure |
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_database_code_amcsd 0011177 |
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3.57 3.57 5.83 90 90 120 P6_3/mmc |
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atom x y z |
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He 1/3 2/3 .25 |
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| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure (permalink)
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Helium |
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Henshaw D G |
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Physical Review 109 (1958) 328-330 |
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Structure of solid helium by neutron diffraction |
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Locality: synthetic |
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Sample: at T = 1.1 K and P = .007 GPa |
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_database_code_amcsd 0015152 |
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3.53 3.53 5.76 90 90 120 P6_3/mmc |
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atom x y z |
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He 1/3 2/3 .25 |
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| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure (permalink)
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Helium |
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Schuch A F, Grilly E R, Mills R L |
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Physical Review 110 (1958) 775-775 |
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Structure of the alpha and beta forms of solid He |
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Locality: synthetic |
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Sample: at T = 1.9 K & P = .01 GPa |
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Note: structure known as the alpha form |
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_database_code_amcsd 0015153 |
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4.01 4.01 4.01 90 90 90 Im3m |
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atom x y z |
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He 0 0 0 |
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| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure (permalink)
|
| |
|
Helium |
| |
Schuch A F, Grilly E R, Mills R L |
| |
Physical Review 110 (1958) 775-775 |
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Structure of the alpha and beta forms of solid He |
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Locality: synthetic |
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Sample: at T = 3.3 K & P = .018 GPa |
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Note: structure known as the beta form |
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_database_code_amcsd 0015154 |
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3.46 3.46 5.60 90 90 120 P6_3/mmc |
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atom x y z |
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He 1/3 2/3 .25 |
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|
| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure (permalink)
|
| |
|
Helium |
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Schuch A F, Mills R L |
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Physical Review Letters 6 (1961) 596-597 |
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New allotropic form of He3 |
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Locality: synthetic |
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Sample: at T = 18.76 K & P = .171 GPa |
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_database_code_amcsd 0015271 |
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4.242 4.242 4.242 90 90 90 Fm3m |
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atom x y z |
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He 0 0 0 |
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| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure (permalink)
|
| |
|
Helium |
| |
Schuch A F, Mills R L |
| |
Physical Review Letters 6 (1961) 596-597 |
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New allotropic form of He3 |
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Locality: synthetic |
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Sample: at T = 15.98 K & P = .136 GPa |
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_database_code_amcsd 0015272 |
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3.046 3.046 4.986 90 90 120 P6_3/mmc |
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atom x y z |
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He 1/3 2/3 .25 |
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|
| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure (permalink)
|
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Helium |
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Schuch A F, Mills R L |
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Physical Review Letters 8 (1962) 469-470 |
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Structure of the gamma form of solid He4 |
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Locality: synthetic |
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Sample: at T = 1.73 K & P = .003 GPa |
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Note: structure known as gamma phase |
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_database_code_amcsd 0015273 |
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4.11 4.11 4.11 90 90 90 Im3m |
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atom x y z |
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He 0 0 0 |
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|
| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure (permalink)
|
| |
|
Helium |
| |
Schuch A F, Mills R L |
| |
Physical Review Letters 8 (1962) 469-470 |
|
Structure of the gamma form of solid He4 |
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Locality: synthetic |
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Sample: at T = 1.73 K & P = .003 GPa |
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_database_code_amcsd 0015274 |
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3.650 3.650 5.945 90 90 120 P6_3/mmc |
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atom x y z |
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He 1/3 2/3 .25 |
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|
| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure (permalink)
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