data_9002901
_chemical_name 'Clinopyroxene'
loop_
_publ_author_name
'Bindi L'
'Safonov O G'
'Yapaskurt V O'
'Perchuk L L'
'Menchetti S'
_journal_name_full "American Mineralogist"
_journal_volume 88
_journal_year 2003
_journal_page_first 464
_journal_page_last 468
_publ_section_title
;
 Ultrapotassic clinopyroxene from the Kumdy-Kol microdiamond mine, Kokchetav
 Complex, Kazakhstan: Occurrence, composition and crystal-chemical characterizat
;
_chemical_formula_sum 'Ca.61 Fe.13 Mg.43 Mn.01 K.17 Na.05 Al Si1.61 O6'
_cell_length_a 9.773
_cell_length_b 8.926
_cell_length_c 5.269
_cell_angle_alpha 90
_cell_angle_beta 105.75
_cell_angle_gamma 90
_cell_volume 442.378
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_symmetry_equiv_pos_as_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_Uiso_or_equiv
Ca2   0.00000   0.30131   0.25000   0.61000   0.01100
Fe2   0.00000   0.30131   0.25000   0.13000   0.01100
Mg2   0.00000   0.30131   0.25000   0.04000   0.01100
Mn2   0.00000   0.30131   0.25000   0.01000   0.01100
K2   0.00000   0.30131   0.25000   0.17000   0.01100
Na2   0.00000   0.30131   0.25000   0.05000   0.01100
Al1   0.00000   0.90339   0.25000   0.61000   0.00860
Mg1   0.00000   0.90339   0.25000   0.39000   0.00860
SiT   0.28752   0.09211   0.23187   0.80500   0.00680
AlT   0.28752   0.09211   0.23187   0.19500   0.00680
O1   0.11480   0.08670   0.14620   1.00000   0.01030
O2   0.36140   0.24960   0.32010   1.00000   0.01180
O3   0.34900   0.01910   0.98710   1.00000   0.01180