data_global
_chemical_name_mineral 'Magnesio-arfvedsonite'
loop_
_publ_author_name
'Ghose S'
'Kersten M'
'Langer K'
'Rossi G'
'Ungaretti L'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 13 
_journal_year 1986
_journal_page_first 291
_journal_page_last 305
_publ_section_title
;
 Crystal field spectra and Jahn Teller effect of Mn3+
 in clinopyroxene and clinoamphiboles from India
 Note: designated as juddite in the paper
;
_database_code_amcsd 0007427
_chemical_formula_sum 'Na1.8 K.31 Mg3.49 Fe.77 Ti.1 Al.15 Mn.4 Li.18 Ca.28 Si7.9 O24 H2'
_cell_length_a 9.7624
_cell_length_b 17.9136
_cell_length_c 5.2874
_cell_angle_alpha 90
_cell_angle_beta 103.837
_cell_angle_gamma 90
_cell_volume 897.826
_exptl_crystal_density_diffrn      3.079
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-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
NaA2   0.00000   0.50000   0.00000   0.04000   0.05053
KA2   0.00000   0.50000   0.00000   0.15500   0.05053
NaAM   0.04430   0.50000   0.09960   0.02000   0.03166
KAM   0.04430   0.50000   0.09960   0.07750   0.03166
MgM1   0.00000   0.08699   0.50000   0.87500   0.00849
FeM1   0.00000   0.08699   0.50000   0.04500   0.00849
TiM1   0.00000   0.08699   0.50000   0.05000   0.00849
AlM1   0.00000   0.08699   0.50000   0.03000   0.00849
MgM2   0.00000   0.18053   0.00000   0.46000   0.00646
MnM2   0.00000   0.18053   0.00000   0.20000   0.00646
FeM2   0.00000   0.18053   0.00000   0.34000   0.00646
MgM3   0.00000   0.00000   0.00000   0.82000   0.00671
LiM3   0.00000   0.00000   0.00000   0.18000   0.00671
CaM4   0.00000   0.27410   0.50000   0.07000   0.01381
NaM4   0.00000   0.27410   0.50000   0.43000   0.01381
CaM4*   0.00000   0.24890   0.50000   0.07000   0.00874
NaM4*   0.00000   0.24890   0.50000   0.43000   0.00874
SiT1   0.28078   0.08552   0.29162   0.98750   0.00532
AlT1   0.28078   0.08552   0.29162   0.01120   0.00532
SiT2   0.28930   0.17117   0.79927   0.98750   0.00557
AlT2   0.28930   0.17117   0.79927   0.01120   0.00557
O1   0.11125   0.08788   0.21377   1.00000   0.00709
O2   0.11866   0.16982   0.72919   1.00000   0.00823
O3   0.10876   0.00000   0.70755   1.00000   0.00760
O4   0.36438   0.24974   0.79558   1.00000   0.01153
O5   0.34879   0.13003   0.08367   1.00000   0.00975
O6   0.34302   0.11947   0.58097   1.00000   0.01001
O7   0.33709   0.00000   0.29434   1.00000   0.01127
H   0.16040   0.00000   0.73690   1.00000   0.04901