#------------------------------------------------------------------------------ #$Date: 2016-02-18 11:08:31 +0000 (Thu, 18 Feb 2016) $ #$Revision: 176725 $ #$URL: file:///home/coder/svn-repositories/cod/cif/9/01/16/9011631.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/. The original data for this entry # were provided the American Mineralogist Crystal Structure Database, # http://rruff.geo.arizona.edu/AMS/amcsd.php # # The file may be used within the scientific community so long as # proper attribution is given to the journal article from which the # data were obtained. # data_9011631 loop_ _publ_author_name 'Schuch, A. F.' 'Grilly, E. R.' 'Mills, R. L.' _publ_section_title ; Structure of the alpha and beta forms of solid He Locality: synthetic Sample: at T = 1.9 K & P = .01 GPa Note: structure known as the alpha form ; _journal_name_full 'Physical Review' _journal_page_first 775 _journal_page_last 775 _journal_paper_doi 10.1103/PhysRev.110.775 _journal_volume 110 _journal_year 1958 _chemical_formula_sum He _chemical_name_common Helium _space_group_IT_number 229 _symmetry_space_group_name_Hall '-I 4 2 3' _symmetry_space_group_name_H-M 'I m -3 m' _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_length_a 4.01 _cell_length_b 4.01 _cell_length_c 4.01 _cell_volume 64.481 _diffrn_ambient_pressure 10000 _diffrn_ambient_temperature 1.9 _exptl_crystal_density_diffrn 0.206 _cod_original_sg_symbol_H-M 'I m 3 m' _cod_database_code 9011631 loop_ _symmetry_equiv_pos_as_xyz x,y,z 1/2+x,1/2+y,1/2+z z,-x,y 1/2+z,1/2-x,1/2+y -y,z,-x 1/2-y,1/2+z,1/2-x x,-y,z 1/2+x,1/2-y,1/2+z -z,x,-y 1/2-z,1/2+x,1/2-y y,-z,x 1/2+y,1/2-z,1/2+x -x,y,-z 1/2-x,1/2+y,1/2-z x,-z,-y 1/2+x,1/2-z,1/2-y -z,y,x 1/2-z,1/2+y,1/2+x y,-x,-z 1/2+y,1/2-x,1/2-z -x,z,y 1/2-x,1/2+z,1/2+y z,-y,-x 1/2+z,1/2-y,1/2-x -y,x,z 1/2-y,1/2+x,1/2+z x,z,y 1/2+x,1/2+z,1/2+y -z,-y,-x 1/2-z,1/2-y,1/2-x y,x,z 1/2+y,1/2+x,1/2+z -x,-z,-y 1/2-x,1/2-z,1/2-y z,y,x 1/2+z,1/2+y,1/2+x -y,-x,-z 1/2-y,1/2-x,1/2-z z,x,-y 1/2+z,1/2+x,1/2-y -y,-z,x 1/2-y,1/2-z,1/2+x x,y,-z 1/2+x,1/2+y,1/2-z -z,-x,y 1/2-z,1/2-x,1/2+y y,z,-x 1/2+y,1/2+z,1/2-x -x,-y,z 1/2-x,1/2-y,1/2+z -z,x,y 1/2-z,1/2+x,1/2+y y,-z,-x 1/2+y,1/2-z,1/2-x -x,y,z 1/2-x,1/2+y,1/2+z z,-x,-y 1/2+z,1/2-x,1/2-y -y,z,x 1/2-y,1/2+z,1/2+x x,-y,-z 1/2+x,1/2-y,1/2-z -x,z,-y 1/2-x,1/2+z,1/2-y z,-y,x 1/2+z,1/2-y,1/2+x -y,x,-z 1/2-y,1/2+x,1/2-z x,-z,y 1/2+x,1/2-z,1/2+y -z,y,-x 1/2-z,1/2+y,1/2-x y,-x,z 1/2+y,1/2-x,1/2+z -x,-z,y 1/2-x,1/2-z,1/2+y z,y,-x 1/2+z,1/2+y,1/2-x -y,-x,z 1/2-y,1/2-x,1/2+z x,z,-y 1/2+x,1/2+z,1/2-y -z,-y,x 1/2-z,1/2-y,1/2+x y,x,-z 1/2+y,1/2+x,1/2-z -z,-x,-y 1/2-z,1/2-x,1/2-y y,z,x 1/2+y,1/2+z,1/2+x -x,-y,-z 1/2-x,1/2-y,1/2-z z,x,y 1/2+z,1/2+x,1/2+y -y,-z,-x 1/2-y,1/2-z,1/2-x loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z He 0.00000 0.00000 0.00000