The structure described by MgSnAsO5 crystallizes in the triclinic P1 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a see-saw-like geometry to one O(11), one O(15), one O(17), and one O(6) atom. In the second Mg site, Mg(2) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(16), one O(18), and one O(5) atom. In the third Mg site, Mg(3) is bonded in a 5-coordinate geometry to one O(13), one O(19), one O(4), one O(8), and one O(9) atom. In the fourth Mg site, Mg(4) is bonded in a distorted see-saw-like geometry to one O(10), one O(14), one O(20), and one O(7) atom. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(11), one O(14), one O(17), one O(20), and one O(4) atom to form SnO6 octahedra that share  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra, and edges with two equivalent Sn(4)O6 octahedra. In the second Sn site, Sn(2) is bonded to one O(12), one O(13), one O(18), one O(19), one O(2), and one O(3) atom to form SnO6 octahedra that share  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra, and edges with two equivalent Sn(3)O6 octahedra. In the third Sn site, Sn(3) is bonded to one O(16), one O(18), one O(19), one O(2), one O(3), and one O(9) atom to form SnO6 octahedra that share  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra, and edges with two equivalent Sn(2)O6 octahedra. In the fourth Sn site, Sn(4) is bonded to one O(1), one O(10), one O(15), one O(17), one O(20), and one O(4) atom to form SnO6 octahedra that share  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra, and edges with two equivalent Sn(1)O6 octahedra. There are four inequivalent As sites. In the first As site, As(1) is bonded in a distorted trigonal non-coplanar geometry to one O(13), one O(5), and one O(9) atom. In the second As site, As(2) is bonded to one O(10), one O(14), one O(2), and one O(6) atom to form AsO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra,  a cornercorner with one Sn(2)O6 octahedra,  a cornercorner with one Sn(3)O6 octahedra, and  a cornercorner with one Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-50°. In the third As site, As(3) is bonded to one O(11), one O(15), one O(3), and one O(7) atom to form AsO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra,  a cornercorner with one Sn(2)O6 octahedra,  a cornercorner with one Sn(3)O6 octahedra, and  a cornercorner with one Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-51°. In the fourth As site, As(4) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(16), and one O(8) atom. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mg(2), one Sn(1), and one Sn(4) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sn(2), one Sn(3), and one As(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sn(2), one Sn(3), and one As(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mg(3), one Sn(1), and one Sn(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mg(2) and one As(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Mg(1) and one As(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Mg(4) and one As(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mg(3) and one As(4) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Mg(3), one Sn(3), and one As(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Mg(4), one Sn(4), and one As(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Mg(1), one Sn(1), and one As(3) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Mg(2), one Sn(2), and one As(4) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Mg(3), one Sn(2), and one As(1) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Mg(4), one Sn(1), and one As(2) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Mg(1), one Sn(4), and one As(3) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Mg(2), one Sn(3), and one As(4) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Sn(1), and one Sn(4) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one Mg(2), one Sn(2), and one Sn(3) atom. In the nineteenth O site, O(19) is bonded in a 3-coordinate geometry to one Mg(3), one Sn(2), and one Sn(3) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal non-coplanar geometry to one Mg(4), one Sn(1), and one Sn(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgSnAsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.371
_cell_length_b   9.002
_cell_length_c   9.086
_cell_angle_alpha   69.567
_cell_angle_beta   89.930
_cell_angle_gamma   89.860
_symmetry_Int_Tables_number   1
_cell_volume   488.295
_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
  Mg  Mg0  1  0.746  0.030  0.033  1.0
  Mg  Mg1  1  0.254  0.403  0.592  1.0
  Mg  Mg2  1  0.755  0.596  0.904  1.0
  Mg  Mg3  1  0.248  0.977  0.471  1.0
  Sn  Sn4  1  0.496  0.001  0.753  1.0
  Sn  Sn5  1  0.505  0.500  0.248  1.0
  Sn  Sn6  1  0.005  0.498  0.248  1.0
  Sn  Sn7  1  0.996  0.001  0.751  1.0
  As  As8  1  0.257  0.391  0.960  1.0
  As  As9  1  0.746  0.113  0.379  1.0
  As  As10  1  0.246  0.886  0.125  1.0
  As  As11  1  0.755  0.608  0.535  1.0
  O  O12  1  0.246  0.164  0.706  1.0
  O  O13  1  0.753  0.317  0.304  1.0
  O  O14  1  0.252  0.682  0.190  1.0
  O  O15  1  0.747  0.838  0.793  1.0
  O  O16  1  0.259  0.489  0.762  1.0
  O  O17  1  0.737  0.030  0.241  1.0
  O  O18  1  0.236  0.961  0.268  1.0
  O  O19  1  0.759  0.512  0.733  1.0
  O  O20  1  0.029  0.493  0.022  1.0
  O  O21  1  0.964  0.055  0.498  1.0
  O  O22  1  0.463  0.949  0.006  1.0
  O  O23  1  0.528  0.504  0.475  1.0
  O  O24  1  0.482  0.494  0.023  1.0
  O  O25  1  0.529  0.059  0.499  1.0
  O  O26  1  0.029  0.947  0.005  1.0
  O  O27  1  0.981  0.503  0.474  1.0
  O  O28  1  0.745  0.130  0.793  1.0
  O  O29  1  0.255  0.358  0.334  1.0
  O  O30  1  0.755  0.640  0.162  1.0
  O  O31  1  0.246  0.872  0.712  1.0
[/CIF]
.
The structure described by MgSnAsO5 crystallizes in the triclinic P1 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a see-saw-like geometry to one O(11), one O(15), one O(17), and one O(6) atom. In the second Mg site, Mg(2) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(16), one O(18), and one O(5) atom. In the third Mg site, Mg(3) is bonded in a 5-coordinate geometry to one O(13), one O(19), one O(4), one O(8), and one O(9) atom. In the fourth Mg site, Mg(4) is bonded in a distorted see-saw-like geometry to one O(10), one O(14), one O(20), and one O(7) atom. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(11), one O(14), one O(17), one O(20), and one O(4) atom to form SnO6 octahedra that share  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra, and edges with two equivalent Sn(4)O6 octahedra. In the second Sn site, Sn(2) is bonded to one O(12), one O(13), one O(18), one O(19), one O(2), and one O(3) atom to form SnO6 octahedra that share  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra, and edges with two equivalent Sn(3)O6 octahedra. In the third Sn site, Sn(3) is bonded to one O(16), one O(18), one O(19), one O(2), one O(3), and one O(9) atom to form SnO6 octahedra that share  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra, and edges with two equivalent Sn(2)O6 octahedra. In the fourth Sn site, Sn(4) is bonded to one O(1), one O(10), one O(15), one O(17), one O(20), and one O(4) atom to form SnO6 octahedra that share  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra, and edges with two equivalent Sn(1)O6 octahedra. There are four inequivalent As sites. In the first As site, As(1) is bonded in a distorted trigonal non-coplanar geometry to one O(13), one O(5), and one O(9) atom. In the second As site, As(2) is bonded to one O(10), one O(14), one O(2), and one O(6) atom to form AsO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra,  a cornercorner with one Sn(2)O6 octahedra,  a cornercorner with one Sn(3)O6 octahedra, and  a cornercorner with one Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-50°. In the third As site, As(3) is bonded to one O(11), one O(15), one O(3), and one O(7) atom to form AsO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra,  a cornercorner with one Sn(2)O6 octahedra,  a cornercorner with one Sn(3)O6 octahedra, and  a cornercorner with one Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-51°. In the fourth As site, As(4) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(16), and one O(8) atom. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mg(2), one Sn(1), and one Sn(4) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sn(2), one Sn(3), and one As(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sn(2), one Sn(3), and one As(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mg(3), one Sn(1), and one Sn(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mg(2) and one As(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Mg(1) and one As(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Mg(4) and one As(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mg(3) and one As(4) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Mg(3), one Sn(3), and one As(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Mg(4), one Sn(4), and one As(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Mg(1), one Sn(1), and one As(3) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Mg(2), one Sn(2), and one As(4) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Mg(3), one Sn(2), and one As(1) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Mg(4), one Sn(1), and one As(2) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Mg(1), one Sn(4), and one As(3) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Mg(2), one Sn(3), and one As(4) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Sn(1), and one Sn(4) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one Mg(2), one Sn(2), and one Sn(3) atom. In the nineteenth O site, O(19) is bonded in a 3-coordinate geometry to one Mg(3), one Sn(2), and one Sn(3) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal non-coplanar geometry to one Mg(4), one Sn(1), and one Sn(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgSnAsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.371
_cell_length_b   9.002
_cell_length_c   9.086
_cell_angle_alpha   69.567
_cell_angle_beta   89.930
_cell_angle_gamma   89.860
_symmetry_Int_Tables_number   1
_cell_volume   488.295
_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
  Mg  Mg0  1  0.746  0.030  0.033  1.0
  Mg  Mg1  1  0.254  0.403  0.592  1.0
  Mg  Mg2  1  0.755  0.596  0.904  1.0
  Mg  Mg3  1  0.248  0.977  0.471  1.0
  Sn  Sn4  1  0.496  0.001  0.753  1.0
  Sn  Sn5  1  0.505  0.500  0.248  1.0
  Sn  Sn6  1  0.005  0.498  0.248  1.0
  Sn  Sn7  1  0.996  0.001  0.751  1.0
  As  As8  1  0.257  0.391  0.960  1.0
  As  As9  1  0.746  0.113  0.379  1.0
  As  As10  1  0.246  0.886  0.125  1.0
  As  As11  1  0.755  0.608  0.535  1.0
  O  O12  1  0.246  0.164  0.706  1.0
  O  O13  1  0.753  0.317  0.304  1.0
  O  O14  1  0.252  0.682  0.190  1.0
  O  O15  1  0.747  0.838  0.793  1.0
  O  O16  1  0.259  0.489  0.762  1.0
  O  O17  1  0.737  0.030  0.241  1.0
  O  O18  1  0.236  0.961  0.268  1.0
  O  O19  1  0.759  0.512  0.733  1.0
  O  O20  1  0.029  0.493  0.022  1.0
  O  O21  1  0.964  0.055  0.498  1.0
  O  O22  1  0.463  0.949  0.006  1.0
  O  O23  1  0.528  0.504  0.475  1.0
  O  O24  1  0.482  0.494  0.023  1.0
  O  O25  1  0.529  0.059  0.499  1.0
  O  O26  1  0.029  0.947  0.005  1.0
  O  O27  1  0.981  0.503  0.474  1.0
  O  O28  1  0.745  0.130  0.793  1.0
  O  O29  1  0.255  0.358  0.334  1.0
  O  O30  1  0.755  0.640  0.162  1.0
  O  O31  1  0.246  0.872  0.712  1.0
[/CIF]
.