The crystal structure described by NaCaBeSi2O6F crystallizes in the orthorhombic P2_12_12_1 space group. Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(5), one O(6), two equivalent O(3), and two equivalent F(1) atoms. Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(5), two equivalent O(2), two equivalent O(6), and one F(1) atom. Be(1) is bonded to one O(2), one O(4), one O(5), and one F(1) atom to form BeO3F tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Be(1)O3F tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with two equivalent Be(1)O3F tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(6) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Ca(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Na(1), one Ca(1), one Si(1), and one Si(2) atom. In the third O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Ca(1), one Be(1), and one Si(2) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Na(1), one Si(1), and one Si(2) atom. In the fifth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Ca(1), one Be(1), and one Si(2) atom. In the sixth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Ca(1), one Be(1), and one Si(1) atom. F(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Ca(1), and one Be(1) atom. is represented by the CIF file [CIF]
data_NaCaBeSi2O6F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.382
_cell_length_b   7.406
_cell_length_c   9.936
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   543.209
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Na  Na0  1  0.105  0.182  0.254  1.0
  Na  Na1  1  0.395  0.818  0.754  1.0
  Na  Na2  1  0.605  0.318  0.746  1.0
  Na  Na3  1  0.895  0.682  0.246  1.0
  Ca  Ca4  1  0.079  0.146  0.739  1.0
  Ca  Ca5  1  0.421  0.854  0.239  1.0
  Ca  Ca6  1  0.579  0.354  0.261  1.0
  Ca  Ca7  1  0.921  0.646  0.761  1.0
  Be  Be8  1  0.119  0.859  0.966  1.0
  Be  Be9  1  0.881  0.359  0.534  1.0
  Be  Be10  1  0.619  0.641  0.034  1.0
  Be  Be11  1  0.381  0.141  0.466  1.0
  Si  Si12  1  0.401  0.142  0.976  1.0
  Si  Si13  1  0.765  0.991  1.000  1.0
  Si  Si14  1  0.099  0.858  0.476  1.0
  Si  Si15  1  0.735  0.009  0.500  1.0
  Si  Si16  1  0.599  0.642  0.524  1.0
  Si  Si17  1  0.901  0.358  0.024  1.0
  Si  Si18  1  0.235  0.491  0.500  1.0
  Si  Si19  1  0.265  0.509  0.000  1.0
  O  O20  1  0.353  0.343  0.909  1.0
  O  O21  1  0.921  0.912  0.903  1.0
  O  O22  1  0.601  0.086  0.911  1.0
  O  O23  1  0.421  0.588  0.097  1.0
  O  O24  1  0.853  0.157  0.091  1.0
  O  O25  1  0.823  0.162  0.595  1.0
  O  O26  1  0.899  0.914  0.411  1.0
  O  O27  1  0.677  0.838  0.095  1.0
  O  O28  1  0.399  0.586  0.589  1.0
  O  O29  1  0.647  0.843  0.591  1.0
  O  O30  1  0.177  0.662  0.905  1.0
  O  O31  1  0.756  0.493  0.090  1.0
  O  O32  1  0.147  0.657  0.409  1.0
  O  O33  1  0.744  0.507  0.590  1.0
  O  O34  1  0.408  0.146  0.136  1.0
  O  O35  1  0.592  0.646  0.364  1.0
  O  O36  1  0.256  0.007  0.910  1.0
  O  O37  1  0.908  0.354  0.864  1.0
  O  O38  1  0.323  0.338  0.405  1.0
  O  O39  1  0.244  0.993  0.410  1.0
  O  O40  1  0.579  0.088  0.403  1.0
  O  O41  1  0.101  0.414  0.089  1.0
  O  O42  1  0.092  0.854  0.636  1.0
  O  O43  1  0.079  0.412  0.597  1.0
  F  F44  1  0.879  0.352  0.374  1.0
  F  F45  1  0.379  0.148  0.626  1.0
  F  F46  1  0.621  0.648  0.874  1.0
  F  F47  1  0.121  0.852  0.126  1.0
[/CIF]
.
The crystal structure described by NaCaBeSi2O6F crystallizes in the orthorhombic P2_12_12_1 space group. Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(5), one O(6), two equivalent O(3), and two equivalent F(1) atoms. Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(5), two equivalent O(2), two equivalent O(6), and one F(1) atom. Be(1) is bonded to one O(2), one O(4), one O(5), and one F(1) atom to form BeO3F tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Be(1)O3F tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with two equivalent Be(1)O3F tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(6) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Ca(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Na(1), one Ca(1), one Si(1), and one Si(2) atom. In the third O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Ca(1), one Be(1), and one Si(2) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Na(1), one Si(1), and one Si(2) atom. In the fifth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Ca(1), one Be(1), and one Si(2) atom. In the sixth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Ca(1), one Be(1), and one Si(1) atom. F(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Ca(1), and one Be(1) atom. is represented by the CIF file [CIF]
data_NaCaBeSi2O6F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.382
_cell_length_b   7.406
_cell_length_c   9.936
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   543.209
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Na  Na0  1  0.105  0.182  0.254  1.0
  Na  Na1  1  0.395  0.818  0.754  1.0
  Na  Na2  1  0.605  0.318  0.746  1.0
  Na  Na3  1  0.895  0.682  0.246  1.0
  Ca  Ca4  1  0.079  0.146  0.739  1.0
  Ca  Ca5  1  0.421  0.854  0.239  1.0
  Ca  Ca6  1  0.579  0.354  0.261  1.0
  Ca  Ca7  1  0.921  0.646  0.761  1.0
  Be  Be8  1  0.119  0.859  0.966  1.0
  Be  Be9  1  0.881  0.359  0.534  1.0
  Be  Be10  1  0.619  0.641  0.034  1.0
  Be  Be11  1  0.381  0.141  0.466  1.0
  Si  Si12  1  0.401  0.142  0.976  1.0
  Si  Si13  1  0.765  0.991  1.000  1.0
  Si  Si14  1  0.099  0.858  0.476  1.0
  Si  Si15  1  0.735  0.009  0.500  1.0
  Si  Si16  1  0.599  0.642  0.524  1.0
  Si  Si17  1  0.901  0.358  0.024  1.0
  Si  Si18  1  0.235  0.491  0.500  1.0
  Si  Si19  1  0.265  0.509  0.000  1.0
  O  O20  1  0.353  0.343  0.909  1.0
  O  O21  1  0.921  0.912  0.903  1.0
  O  O22  1  0.601  0.086  0.911  1.0
  O  O23  1  0.421  0.588  0.097  1.0
  O  O24  1  0.853  0.157  0.091  1.0
  O  O25  1  0.823  0.162  0.595  1.0
  O  O26  1  0.899  0.914  0.411  1.0
  O  O27  1  0.677  0.838  0.095  1.0
  O  O28  1  0.399  0.586  0.589  1.0
  O  O29  1  0.647  0.843  0.591  1.0
  O  O30  1  0.177  0.662  0.905  1.0
  O  O31  1  0.756  0.493  0.090  1.0
  O  O32  1  0.147  0.657  0.409  1.0
  O  O33  1  0.744  0.507  0.590  1.0
  O  O34  1  0.408  0.146  0.136  1.0
  O  O35  1  0.592  0.646  0.364  1.0
  O  O36  1  0.256  0.007  0.910  1.0
  O  O37  1  0.908  0.354  0.864  1.0
  O  O38  1  0.323  0.338  0.405  1.0
  O  O39  1  0.244  0.993  0.410  1.0
  O  O40  1  0.579  0.088  0.403  1.0
  O  O41  1  0.101  0.414  0.089  1.0
  O  O42  1  0.092  0.854  0.636  1.0
  O  O43  1  0.079  0.412  0.597  1.0
  F  F44  1  0.879  0.352  0.374  1.0
  F  F45  1  0.379  0.148  0.626  1.0
  F  F46  1  0.621  0.648  0.874  1.0
  F  F47  1  0.121  0.852  0.126  1.0
[/CIF]
.