data_global
_chemical_name_mineral 'Natalyite'
loop_
_publ_author_name
'Secco L'
'Martignago F'
'Dal Negro A'
'Reznitskii L Z'
'Sklyarov E V'
_journal_name_full 'American Mineralogist'
_journal_volume 87 
_journal_year 2002
_journal_page_first 709
_journal_page_last 714
_publ_section_title
;
 Crystal chemistry of Cr-V-rich clinopyroxenes
 Sample 4
;
_database_code_amcsd 0002809
_chemical_formula_sum 'Si2 Al.046 Cr.238 V.257 Mg.461 (Ca.463 Na.537) O6'
_cell_length_a 9.6582
_cell_length_b 8.8273
_cell_length_c 5.2665
_cell_angle_alpha 90
_cell_angle_beta 106.577
_cell_angle_gamma 90
_cell_volume 430.338
_exptl_crystal_density_diffrn      3.411
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
SiT   0.28912   0.09199   0.23179   0.99900   0.00432
AlT   0.28912   0.09199   0.23179   0.00100   0.00432
CrM1   0.00000   0.90568   0.25000   0.23800   0.00498
VM1   0.00000   0.90568   0.25000   0.25700   0.00498
MgM1   0.00000   0.90568   0.25000   0.46100   0.00498
AlM1   0.00000   0.90568   0.25000   0.04400   0.00498
CaM2   0.00000   0.30179   0.25000   0.46300   0.00941
NaM2   0.00000   0.30179   0.25000   0.53700   0.00941
O1   0.11457   0.08184   0.13966   1.00000   0.00703
O2   0.36041   0.25417   0.31028   1.00000   0.00837
O3   0.35165   0.01373   0.00211   1.00000   0.00723