The material structure described by KAlMg3Si3O10(OH)2 crystallizes in the triclinic P1 space group. K(1) is bonded in a 4-coordinate geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(3), and one O(4) 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(1), one O(11), one O(12), one O(2), one O(3), and one O(4) 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(1), one O(11), one O(12), one O(2), one O(3), and one O(4) 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(5), one O(7), and one O(8) 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 are 61°. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(5), one O(7), 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 Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. In the second Si site, Si(2) is bonded to one O(10), one O(3), one O(6), and one O(9) 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 56-57°. In the third Si site, Si(3) is bonded to one O(10), one O(4), one O(6), and one O(9) 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 56-57°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(11) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(12) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mg(2), one Mg(3), and one Al(1) atom to form distorted OMg3Al tetrahedra that share corners with three equivalent O(11)Mg3H tetrahedra and corners with three equivalent O(2)Mg3Si trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Mg(2), one Mg(3), and one Si(1) atom to form distorted OMg3Si trigonal pyramids that share corners with three equivalent O(1)Mg3Al tetrahedra and corners with three equivalent O(11)Mg3H tetrahedra. In the third O site, O(3) 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 fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one K(1), one Si(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one Si(1) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the eleventh O site, O(11) is bonded to one Mg(1), one Mg(2), one Mg(3), and one H(1) atom to form distorted OMg3H tetrahedra that share corners with three equivalent O(1)Mg3Al tetrahedra and corners with three equivalent O(2)Mg3Si trigonal pyramids. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Mg(1), one Mg(2), one Mg(3), and one H(2) atom. is represented by the CIF file [CIF]
data_KMg3AlSi3(HO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.361
_cell_length_b   5.364
_cell_length_c   10.579
_cell_angle_alpha   79.107
_cell_angle_beta   84.567
_cell_angle_gamma   60.021
_symmetry_Int_Tables_number   1
_cell_volume   258.782
_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  0.999  0.995  0.979  1.0
  Mg  Mg1  1  0.337  0.828  0.506  1.0
  Mg  Mg2  1  0.666  0.160  0.505  1.0
  Mg  Mg3  1  0.998  0.504  0.506  1.0
  Al  Al4  1  0.666  0.735  0.768  1.0
  Si  Si5  1  0.334  0.399  0.773  1.0
  Si  Si6  1  0.332  0.267  0.235  1.0
  Si  Si7  1  0.665  0.600  0.235  1.0
  H  H8  1  0.999  0.098  0.691  1.0
  H  H9  1  0.012  0.903  0.305  1.0
  O  O10  1  0.665  0.796  0.600  1.0
  O  O11  1  0.335  0.457  0.612  1.0
  O  O12  1  0.331  0.213  0.390  1.0
  O  O13  1  0.664  0.540  0.390  1.0
  O  O14  1  0.013  0.467  0.827  1.0
  O  O15  1  0.998  0.467  0.176  1.0
  O  O16  1  0.565  0.058  0.829  1.0
  O  O17  1  0.421  0.610  0.828  1.0
  O  O18  1  0.487  0.955  0.176  1.0
  O  O19  1  0.509  0.445  0.174  1.0
  O  O20  1  0.000  0.133  0.598  1.0
  O  O21  1  0.005  0.869  0.398  1.0
[/CIF]
.
The material structure described by KAlMg3Si3O10(OH)2 crystallizes in the triclinic P1 space group. K(1) is bonded in a 4-coordinate geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(3), and one O(4) 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(1), one O(11), one O(12), one O(2), one O(3), and one O(4) 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(1), one O(11), one O(12), one O(2), one O(3), and one O(4) 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(5), one O(7), and one O(8) 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 are 61°. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(5), one O(7), 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 Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. In the second Si site, Si(2) is bonded to one O(10), one O(3), one O(6), and one O(9) 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 56-57°. In the third Si site, Si(3) is bonded to one O(10), one O(4), one O(6), and one O(9) 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 56-57°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(11) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(12) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mg(2), one Mg(3), and one Al(1) atom to form distorted OMg3Al tetrahedra that share corners with three equivalent O(11)Mg3H tetrahedra and corners with three equivalent O(2)Mg3Si trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Mg(2), one Mg(3), and one Si(1) atom to form distorted OMg3Si trigonal pyramids that share corners with three equivalent O(1)Mg3Al tetrahedra and corners with three equivalent O(11)Mg3H tetrahedra. In the third O site, O(3) 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 fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one Mg(3), and one Si(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one K(1), one Si(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one Si(1) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the eleventh O site, O(11) is bonded to one Mg(1), one Mg(2), one Mg(3), and one H(1) atom to form distorted OMg3H tetrahedra that share corners with three equivalent O(1)Mg3Al tetrahedra and corners with three equivalent O(2)Mg3Si trigonal pyramids. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Mg(1), one Mg(2), one Mg(3), and one H(2) atom. is represented by the CIF file [CIF]
data_KMg3AlSi3(HO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.361
_cell_length_b   5.364
_cell_length_c   10.579
_cell_angle_alpha   79.107
_cell_angle_beta   84.567
_cell_angle_gamma   60.021
_symmetry_Int_Tables_number   1
_cell_volume   258.782
_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  0.999  0.995  0.979  1.0
  Mg  Mg1  1  0.337  0.828  0.506  1.0
  Mg  Mg2  1  0.666  0.160  0.505  1.0
  Mg  Mg3  1  0.998  0.504  0.506  1.0
  Al  Al4  1  0.666  0.735  0.768  1.0
  Si  Si5  1  0.334  0.399  0.773  1.0
  Si  Si6  1  0.332  0.267  0.235  1.0
  Si  Si7  1  0.665  0.600  0.235  1.0
  H  H8  1  0.999  0.098  0.691  1.0
  H  H9  1  0.012  0.903  0.305  1.0
  O  O10  1  0.665  0.796  0.600  1.0
  O  O11  1  0.335  0.457  0.612  1.0
  O  O12  1  0.331  0.213  0.390  1.0
  O  O13  1  0.664  0.540  0.390  1.0
  O  O14  1  0.013  0.467  0.827  1.0
  O  O15  1  0.998  0.467  0.176  1.0
  O  O16  1  0.565  0.058  0.829  1.0
  O  O17  1  0.421  0.610  0.828  1.0
  O  O18  1  0.487  0.955  0.176  1.0
  O  O19  1  0.509  0.445  0.174  1.0
  O  O20  1  0.000  0.133  0.598  1.0
  O  O21  1  0.005  0.869  0.398  1.0
[/CIF]
.