Crystallography Open Database

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Searching space group like 'P -4 21 m'

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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
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

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