Crystallography Open Database
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Result: there are 393 entries in the selection
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Searching space group like 'P -4 21 m'
COD ID ![]() |
Links | Formula ![]() |
Space group ![]() |
Cell parameters | Cell volume ![]() |
Bibliography |
|---|---|---|---|---|---|---|
| 9013637 | CIF | Ca2 Mg O7 Si2 | P -4 21 m | 7.57; 7.57; 4.781 90; 90; 90 | 273.975 | Merlini, M.; Gemmi, M.; Hanfland, M.; Crichton, W. High-pressure behavior of akermanite and gehlenite and phase stability of the normal structures in melelites Note: P = 15 GPa American Mineralogist, 2009, 94, 704-709 |
| 9014399 | CIF | Ba2 Cu O7 Si2 | P -4 21 m | 8.284; 8.284; 5.313 90; 90; 90 | 364.603 | Du, J. M.; Zeng, H. Y.; Song, L. J.; Dong, Z. C.; Ma, H. W.; Guo, G. C.; Huang, J. S. Synthesis and structure of a new polymorph Ba2CuSi2O7 Note: known as beta-Ba2CuSi2O7 Jiegou Huaxue, 2003, 22, 33-36 |
| 9014854 | CIF | Al0.66 Ca1.96 Fe0.12 Mg0.24 Na0.04 O7 Si1.3 | P -4 21 m | 7.738; 7.738; 5.045 90; 90; 90 | 302.078 | Mokeeva, V.; Makarov, E. Isomorph in melilites: refining of crystal structure of akermanite and intermediate melilite Geokhimiya, 1979, 10, 1541-1544 |
| 9015368 | CIF | Al0.41 Ca1.5 Fe0.16 Mg0.39 Na0.5 O7 Si2 | P -4 21 m | 7.76; 7.76; 5.029 90; 90; 90 | 302.834 | Mokeeva, V.; Makarov, E. Isomorph in melilites: refining of crystal structure of akermanite and intermediate melilite Geokhimiya, 1979, 10, 1541-1544 |
| 9017316 | CIF | C H4 N2 O | P -4 21 m | 5.584; 5.584; 4.689 90; 90; 90 | 146.208 | Swaminathan, S.; Craven, B. M. The crystal structure and molecular thermal motion of urea at 12, 60 and 123 K from neutron diffraction Note: neutron data, T = 123 K Acta Crystallographica, Section B, 1984, 40, 300-306 |
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