The material structure described by KMg3Al(SiO4)3 crystallizes in the triclinic P1 space group. K(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(7), and two equivalent O(8) atoms. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(2)O6 octahedra, and edges with three equivalent Mg(3)O6 octahedra. In the second Mg site, Mg(2) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(1)O6 octahedra, and edges with three equivalent Mg(3)O6 octahedra. In the third Mg site, Mg(3) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(1)O6 octahedra, and edges with three equivalent Mg(2)O6 octahedra. Al(1) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 61-63°. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(10), one O(2), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, and corners with three equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-60°. In the second Si site, Si(2) is bonded to one O(11), one O(3), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, and corners with three equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-58°. In the third Si site, Si(3) is bonded to one O(12), one O(3), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, and corners with three equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-57°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one Mg(3) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one Mg(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted tetrahedral geometry to one Mg(1), one Mg(2), one Mg(3), and one Al(1) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(1) atom. In the eleventh O site, O(11) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(2) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(3) atom. is represented by the CIF card [CIF]
data_KMg3Al(SiO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.379
_cell_length_b   5.409
_cell_length_c   10.264
_cell_angle_alpha   84.681
_cell_angle_beta   80.550
_cell_angle_gamma   60.613
_symmetry_Int_Tables_number   1
_cell_volume   256.650
_cell_formula_units_Z   1
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
  K  K0  1  0.493  0.999  0.021  1.0
  Mg  Mg1  1  0.323  0.352  0.496  1.0
  Mg  Mg2  1  0.679  0.652  0.494  1.0
  Mg  Mg3  1  0.010  0.997  0.497  1.0
  Al  Al4  1  0.755  0.328  0.225  1.0
  Si  Si5  1  0.093  0.665  0.220  1.0
  Si  Si6  1  0.242  0.667  0.775  1.0
  Si  Si7  1  0.910  0.333  0.775  1.0
  O  O8  1  0.432  0.505  0.159  1.0
  O  O9  1  0.945  0.507  0.163  1.0
  O  O10  1  0.559  0.500  0.833  1.0
  O  O11  1  0.059  0.497  0.836  1.0
  O  O12  1  0.378  0.000  0.412  1.0
  O  O13  1  0.620  0.006  0.584  1.0
  O  O14  1  0.951  0.989  0.161  1.0
  O  O15  1  0.059  0.999  0.833  1.0
  O  O16  1  0.705  0.329  0.400  1.0
  O  O17  1  0.047  0.664  0.384  1.0
  O  O18  1  0.285  0.669  0.616  1.0
  O  O19  1  0.957  0.340  0.616  1.0
[/CIF]
.
The material structure described by KMg3Al(SiO4)3 crystallizes in the triclinic P1 space group. K(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(7), and two equivalent O(8) atoms. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(2)O6 octahedra, and edges with three equivalent Mg(3)O6 octahedra. In the second Mg site, Mg(2) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(1)O6 octahedra, and edges with three equivalent Mg(3)O6 octahedra. In the third Mg site, Mg(3) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, edges with three equivalent Mg(1)O6 octahedra, and edges with three equivalent Mg(2)O6 octahedra. Al(1) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 61-63°. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(10), one O(2), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, and corners with three equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-60°. In the second Si site, Si(2) is bonded to one O(11), one O(3), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, and corners with three equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-58°. In the third Si site, Si(3) is bonded to one O(12), one O(3), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra, and corners with three equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-57°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one Mg(3) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one Mg(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Al(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Si(2), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted tetrahedral geometry to one Mg(1), one Mg(2), one Mg(3), and one Al(1) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(1) atom. In the eleventh O site, O(11) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(2) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(3) atom. is represented by the CIF card [CIF]
data_KMg3Al(SiO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.379
_cell_length_b   5.409
_cell_length_c   10.264
_cell_angle_alpha   84.681
_cell_angle_beta   80.550
_cell_angle_gamma   60.613
_symmetry_Int_Tables_number   1
_cell_volume   256.650
_cell_formula_units_Z   1
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
  K  K0  1  0.493  0.999  0.021  1.0
  Mg  Mg1  1  0.323  0.352  0.496  1.0
  Mg  Mg2  1  0.679  0.652  0.494  1.0
  Mg  Mg3  1  0.010  0.997  0.497  1.0
  Al  Al4  1  0.755  0.328  0.225  1.0
  Si  Si5  1  0.093  0.665  0.220  1.0
  Si  Si6  1  0.242  0.667  0.775  1.0
  Si  Si7  1  0.910  0.333  0.775  1.0
  O  O8  1  0.432  0.505  0.159  1.0
  O  O9  1  0.945  0.507  0.163  1.0
  O  O10  1  0.559  0.500  0.833  1.0
  O  O11  1  0.059  0.497  0.836  1.0
  O  O12  1  0.378  0.000  0.412  1.0
  O  O13  1  0.620  0.006  0.584  1.0
  O  O14  1  0.951  0.989  0.161  1.0
  O  O15  1  0.059  0.999  0.833  1.0
  O  O16  1  0.705  0.329  0.400  1.0
  O  O17  1  0.047  0.664  0.384  1.0
  O  O18  1  0.285  0.669  0.616  1.0
  O  O19  1  0.957  0.340  0.616  1.0
[/CIF]
.