Crystallography Open Database

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Searching space group like 'P -4 21 m'

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9010520 CIFAl1.91 Ca2 Fe0.02 Mg0.05 O7 Si1.02P -4 21 m7.716; 7.716; 5.089
90; 90; 90		302.982Louisnathan, S. J.
Refinement of the crystal structure of a natural gehlenite, Ca2Al(Al,Si)2O7
The Canadian Mineralogist, 1971, 10, 822-837
9013636 CIFCa2 Mg O7 Si2P -4 21 m7.74; 7.74; 4.932
90; 90; 90		295.464Merlini, 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 = 5 GPa
American Mineralogist, 2009, 94, 704-709
9013637 CIFCa2 Mg O7 Si2P -4 21 m7.57; 7.57; 4.781
90; 90; 90		273.975Merlini, 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 CIFBa2 Cu O7 Si2P -4 21 m8.284; 8.284; 5.313
90; 90; 90		364.603Du, 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 CIFAl0.66 Ca1.96 Fe0.12 Mg0.24 Na0.04 O7 Si1.3P -4 21 m7.738; 7.738; 5.045
90; 90; 90		302.078Mokeeva, V.; Makarov, E.
Isomorph in melilites: refining of crystal structure of akermanite and intermediate melilite
Geokhimiya, 1979, 10, 1541-1544

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