data_1011273
_chemical_name_systematic          'Barium alumosilicate hydrate *'
_chemical_name_mineral             'Harmotome'
_chemical_compound_source
;
from Strontian, Ecosse, from the Collection of the Museum na
;
_chemical_formula_structural       'Ba Al2 Si6 O16 (H2 O)6'
_chemical_formula_sum              'H12 Al2 Ba O22 Si6'
_publ_section_title                'Sur l'harmotome'
loop_
_publ_author_name
  'Sekanina, J'
  'Wyart, J'
_journal_name_full
;
Bulletin de la Societe Francaise de Mineralogie (-71,1948)
;
_journal_coden_ASTM                BSFMAU
_journal_volume                    60
_journal_year                      1937
_journal_page_first                139
_journal_page_last                 145
_cell_length_a                     9.8
_cell_length_b                     14.1
_cell_length_c                     8.66
_cell_angle_alpha                  90
_cell_angle_beta                   55.17
_cell_angle_gamma                  90
_cell_volume                       982.3
_cell_formula_units_Z              2
_exptl_crystal_density_meas        2.45
_symmetry_space_group_name_H-M     'P 1 21 1'
_symmetry_Int_Tables_number        4
_symmetry_cell_setting             monoclinic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,1/2+y,-z'