Crystallography Open Database

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Searching space group like 'P -4 21 m'

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9017542 CIFAl0.5 Ca1.52 Fe0.3 Mg0.2 Na0.48 O7 Si2P -4 21 m7.7661; 7.7661; 5.0297
90; 90; 90		303.353Wiedenmann, D.; Zaitsev, A. N.; Britvin, S. N.; Krivovichev, S. V.; Keller, J.
Alumoakermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania
Mineralogical Magazine, 2009, 73, 373-384
9017318 CIFC H4 N2 OP -4 21 m5.565; 5.565; 4.684
90; 90; 90		145.06Swaminathan, 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 = 12 K
Acta Crystallographica, Section B, 1984, 40, 300-306
9017317 CIFC H4 N2 OP -4 21 m5.57; 5.57; 4.688
90; 90; 90		145.445Swaminathan, 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 = 60 K
Acta Crystallographica, Section B, 1984, 40, 300-306
9017316 CIFC H4 N2 OP -4 21 m5.584; 5.584; 4.689
90; 90; 90		146.208Swaminathan, 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
9015368 CIFAl0.41 Ca1.5 Fe0.16 Mg0.39 Na0.5 O7 Si2P -4 21 m7.76; 7.76; 5.029
90; 90; 90		302.834Mokeeva, V.; Makarov, E.
Isomorph in melilites: refining of crystal structure of akermanite and intermediate melilite
Geokhimiya, 1979, 10, 1541-1544
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
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
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
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
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
9009856 CIFCu3 Se2P -4 21 m6.4024; 6.4024; 4.2786
90; 90; 90		175.383Heyding, R. D.; Murray, R. M.
Crystal structures of Cu1.8Se, Cu3Se2, alpha- and gamma=CuSe, CuSe2, and CuSe2II Locality: Beaverlodge Region, Saskatchewan, Canada
Canadian Journal of Chemistry, 1976, 54, 841-848
9009730 CIFCa2 Fe0.446 Mg0.554 O7 Si2P -4 21 m7.8679; 7.8679; 5.0144
90; 90; 90		310.411Kusaka, K.; Ohmasa, M.; Hagiya, K.; Iishi, K.; Haga, N.
On variety of the Ca coordination in the incommensurate structure of synthetic iron-bearing akermanite, Ca2(Mg0.55,Fe0.45)Si2O7 Note: Sample is synthetic, this is the structure obtained from a standard refinement
Mineralogical Journal, 1998, 20, 47-58
9009412 CIFBe Ca2 O7 Si2P -4 21 m7.433; 7.433; 4.997
90; 90; 90		276.082Yang, Z.; Fleck, M.; Pertlik, F.; Tillmanns, E.; Tao, K.
The crystal structure of natural gugiaite, Ca2BeSi2O7 Locality: skarn rocks in the Gugia alkaline complex, Liaoning Province, China Note, z coordinate of Ca is altered to reproduce reported Ca-O bond lengths
Neues Jahrbuch fur Mineralogie, Monatshefte, 2001, 2001, 186-192
9009317 CIFAl1.94 Ba0.879 H7.5 K0.025 Na0.03 O13.75 Si3.06P -4 21 m9.584; 9.584; 6.524
90; 90; 90		599.249Mazzi, F.; Galli, E.; Gottardi, G.
Crystal structure refinement of two tetragonal edingtonites
Neues Jahrbuch fur Mineralogie, Monatshefte, 1984, 1984, 373-382
9009316 CIFAl1.95 Ba0.928 H7.404 K0.048 O13.702 Si3.065P -4 21 m9.581; 9.581; 6.526
90; 90; 90		599.058Mazzi, F.; Galli, E.; Gottardi, G.
Crystal structure refinement of two tetragonal edingtonites
Neues Jahrbuch fur Mineralogie, Monatshefte, 1984, 1984, 373-382
9008195 CIFAl Ca Na O7 Si2P -4 21 m7.6344; 7.6344; 5.0513
90; 90; 90		294.41Louisnathan, S. J.
The crystal structure of synthetic soda melilite, CaNaAlSi2O7
Zeitschrift fur Kristallographie, 1970, 131, 314-321
9008187 CIFCa2 O7 Si2 ZnP -4 21 m7.8279; 7.8279; 5.0138
90; 90; 90		307.226Louisnathan, S. J.
Refinement of the crystal structure of hardystonite, Ca2ZnSi2O7
Zeitschrift fur Kristallographie, 1969, 130, 427-437
9007369 CIFAl0.09 Ca1.87 K0.02 Mg0.96 Na0.1 O7 Si1.98 Sr0.02P -4 21 m7.879; 7.879; 5.032
90; 90; 90		312.38Bindi, L.; Bonazzi, P.
Incommensurate-normal phase transition in natural melilite: an in situ high-temperature X-ray single-crystal study Sample: San Venanzo, Italy; T = 773 K Note: xO1 and yO1 corrected by authors
Physics and Chemistry of Minerals, 2005, 32, 89-96
9007368 CIFAl0.09 Ca1.87 K0.02 Mg0.96 Na0.1 O7 Si1.98 Sr0.02P -4 21 m7.868; 7.868; 5.027
90; 90; 90		311.199Bindi, L.; Bonazzi, P.
Incommensurate-normal phase transition in natural melilite: an in situ high-temperature X-ray single-crystal study Sample: San Venanzo, Italy; T = 673 K Note: xO1 and yO1 corrected by authors
Physics and Chemistry of Minerals, 2005, 32, 89-96
9007367 CIFAl0.09 Ca1.87 K0.02 Mg0.96 Na0.1 O7 Si1.98 Sr0.02P -4 21 m7.857; 7.857; 5.022
90; 90; 90		310.02Bindi, L.; Bonazzi, P.
Incommensurate-normal phase transition in natural melilite: an in situ high-temperature X-ray single-crystal study Sample: San Venanzo, Italy; T = 573 K Note: xO1 and yO1 corrected by authors
Physics and Chemistry of Minerals, 2005, 32, 89-96

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