data_1011270
_chemical_name_systematic
;
Calcium beryllium hydroxide phosphate difluoride
;
_chemical_name_mineral             'Herderite'
_chemical_compound_source          'from Obernham, Maine, USA'
_chemical_formula_structural       'Be Ca F2 (O H) P O4'
_chemical_formula_sum              'H Be Ca F2 O5 P'
_publ_section_title                'Datolith und Herderit'
_publ_author_name                  'Strunz, H'
_journal_name_full
;
Zeitschrift fuer Kristallographie, Kristallgeometrie, Kristallphysik,
Kristallchemie (-144,1977)
;
_journal_coden_ASTM                ZEKGAX
_journal_volume                    93
_journal_year                      1936
_journal_page_first                146
_journal_page_last                 150
_cell_length_a                     4.8
_cell_length_b                     7.68
_cell_length_c                     9.8
_cell_angle_alpha                  90
_cell_angle_beta                   90.1
_cell_angle_gamma                  90
_cell_volume                       361.3
_cell_formula_units_Z              4
_symmetry_space_group_name_H-M     'P 1 21/c 1'
_symmetry_Int_Tables_number        14
_symmetry_cell_setting             monoclinic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,1/2+y,1/2-z'
  '-x,-y,-z'
  'x,1/2-y,1/2+z'