The structure described by K6MgCu(SiO4)2 crystallizes in the triclinic P1 space group. There are six inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(7) atom. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the third K site, K(3) is bonded in a 3-coordinate geometry to one O(1), one O(4), one O(7), and one O(8) atom. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(6), and one O(7) atom. In the fifth K site, K(5) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the sixth K site, K(6) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(8) atom. Mg(1) is bonded in a 2-coordinate geometry to one O(5) and one O(8) atom. Cu(1) is bonded in a 3-coordinate geometry to one O(4), one O(6), and one O(7) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(4), and one O(7) atom. In the second Si site, Si(2) is bonded in a tetrahedral geometry to one O(3), one O(5), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), one K(3), one K(5), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), one K(4), one K(5), one K(6), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one K(2), one K(4), one K(5), one K(6), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one K(2), one K(3), one K(5), one K(6), one Cu(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one K(2), one K(5), one K(6), one Mg(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(2), one K(4), one K(5), one Cu(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal bipyramidal geometry to one K(1), one K(3), one K(4), one Cu(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one K(3), one K(6), one Mg(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_K6MgCu(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.435
_cell_length_b   7.477
_cell_length_c   7.388
_cell_angle_alpha   83.098
_cell_angle_beta   84.611
_cell_angle_gamma   74.736
_symmetry_Int_Tables_number   1
_cell_volume   339.752
_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  0.630  0.860  0.165  1.0
  K  K1  1  0.790  0.354  0.968  1.0
  K  K2  1  0.299  0.836  0.587  1.0
  K  K3  1  0.827  0.112  0.461  1.0
  K  K4  1  0.177  0.711  0.015  1.0
  K  K5  1  0.341  0.199  0.823  1.0
  Mg  Mg6  1  0.408  0.433  0.387  1.0
  Cu  Cu7  1  0.979  0.534  0.487  1.0
  Si  Si8  1  0.775  0.767  0.733  1.0
  Si  Si9  1  0.221  0.235  0.257  1.0
  O  O10  1  0.570  0.721  0.864  1.0
  O  O11  1  0.845  0.946  0.801  1.0
  O  O12  1  0.178  0.060  0.170  1.0
  O  O13  1  0.994  0.579  0.738  1.0
  O  O14  1  0.409  0.332  0.142  1.0
  O  O15  1  0.994  0.410  0.272  1.0
  O  O16  1  0.722  0.802  0.513  1.0
  O  O17  1  0.320  0.190  0.464  1.0
[/CIF]
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The structure described by K6MgCu(SiO4)2 crystallizes in the triclinic P1 space group. There are six inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(7) atom. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the third K site, K(3) is bonded in a 3-coordinate geometry to one O(1), one O(4), one O(7), and one O(8) atom. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(6), and one O(7) atom. In the fifth K site, K(5) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the sixth K site, K(6) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(8) atom. Mg(1) is bonded in a 2-coordinate geometry to one O(5) and one O(8) atom. Cu(1) is bonded in a 3-coordinate geometry to one O(4), one O(6), and one O(7) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(4), and one O(7) atom. In the second Si site, Si(2) is bonded in a tetrahedral geometry to one O(3), one O(5), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), one K(3), one K(5), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), one K(4), one K(5), one K(6), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one K(2), one K(4), one K(5), one K(6), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one K(2), one K(3), one K(5), one K(6), one Cu(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one K(2), one K(5), one K(6), one Mg(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(2), one K(4), one K(5), one Cu(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal bipyramidal geometry to one K(1), one K(3), one K(4), one Cu(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one K(3), one K(6), one Mg(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_K6MgCu(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.435
_cell_length_b   7.477
_cell_length_c   7.388
_cell_angle_alpha   83.098
_cell_angle_beta   84.611
_cell_angle_gamma   74.736
_symmetry_Int_Tables_number   1
_cell_volume   339.752
_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  0.630  0.860  0.165  1.0
  K  K1  1  0.790  0.354  0.968  1.0
  K  K2  1  0.299  0.836  0.587  1.0
  K  K3  1  0.827  0.112  0.461  1.0
  K  K4  1  0.177  0.711  0.015  1.0
  K  K5  1  0.341  0.199  0.823  1.0
  Mg  Mg6  1  0.408  0.433  0.387  1.0
  Cu  Cu7  1  0.979  0.534  0.487  1.0
  Si  Si8  1  0.775  0.767  0.733  1.0
  Si  Si9  1  0.221  0.235  0.257  1.0
  O  O10  1  0.570  0.721  0.864  1.0
  O  O11  1  0.845  0.946  0.801  1.0
  O  O12  1  0.178  0.060  0.170  1.0
  O  O13  1  0.994  0.579  0.738  1.0
  O  O14  1  0.409  0.332  0.142  1.0
  O  O15  1  0.994  0.410  0.272  1.0
  O  O16  1  0.722  0.802  0.513  1.0
  O  O17  1  0.320  0.190  0.464  1.0
[/CIF]
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