The material structure described by K2Fe5Al4Si5(HO6)4 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(10), one O(21), one O(23), one O(24), and one O(9) atom. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(14), one O(18), one O(2), one O(20), and one O(8) atom. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(18), one O(2), and one O(6) atom. In the second Fe site, Fe(2) is bonded to one O(10), one O(13), one O(24), and one O(7) atom to form distorted FeO4 trigonal pyramids that share  a cornercorner with one Al(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and  an edgeedge with one Al(4)O4 trigonal pyramid. In the third Fe site, Fe(3) is bonded in a 5-coordinate geometry to one O(12), one O(13), one O(14), one O(2), and one O(8) atom. In the fourth Fe site, Fe(4) is bonded in a 4-coordinate geometry to one O(15), one O(18), one O(8), and one O(9) atom. In the fifth Fe site, Fe(5) is bonded in a 6-coordinate geometry to one O(22), one O(23), one O(3), one O(4), one O(6), and one O(9) atom. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(17), one O(19), one O(20), and one O(21) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Al(3)O4 tetrahedra, and  a cornercorner with one Al(4)O4 trigonal pyramid. In the second Al site, Al(2) is bonded to one O(17), one O(18), one O(5), and one O(8) atom to form distorted AlO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra, and  a cornercorner with one Si(4)HO3 tetrahedra. In the third Al site, Al(3) is bonded to one O(17), one O(20), one O(23), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 trigonal pyramid, and  a cornercorner with one Al(4)O4 trigonal pyramid. In the fourth Al site, Al(4) is bonded to one O(19), one O(24), one O(3), and one O(7) atom to form distorted AlO4 trigonal pyramids that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra, and  an edgeedge with one Fe(2)O4 trigonal pyramid. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(16), one O(2), one O(22), and one O(4) atom to form distorted corner-sharing SiO5 trigonal bipyramids. In the second Si site, Si(2) is bonded in a 3-coordinate geometry to one O(1), one O(11), and one O(4) atom. In the third Si site, Si(3) is bonded to one O(11), one O(12), one O(15), and one O(6) atom to form corner-sharing SiO4 tetrahedra. In the fourth Si site, Si(4) is bonded to one H(1), one O(12), one O(14), and one O(5) atom to form SiHO3 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra and  a cornercorner with one Si(3)O4 tetrahedra. In the fifth Si site, Si(5) is bonded to one O(10), one O(21), one O(22), and one O(23) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra,  a cornercorner with one Si(1)O5 trigonal bipyramid, and  a cornercorner with one Fe(2)O4 trigonal pyramid. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Si(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(16) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(13) atom. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(2), one Fe(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(2), one Fe(1), one Fe(3), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Fe(5) and one Al(4) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Fe(5), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Al(2) and one Si(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(5), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Fe(2), one Al(3), and one Al(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one K(2), one Fe(3), one Fe(4), and one Al(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one K(1), one Fe(4), one Fe(5), and one H(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one K(1), one Fe(2), and one Si(5) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal pyramidal geometry to one Fe(1), one Fe(3), one Si(3), and one Si(4) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Fe(2), one Fe(3), and one H(4) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one K(2), one Fe(3), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Fe(4) and one Si(3) atom. In the sixteenth O site, O(16) is bonded in a water-like geometry to one Si(1) and one H(3) atom. In the seventeenth O site, O(17) is bonded in a trigonal planar geometry to one Al(1), one Al(2), and one Al(3) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one K(2), one Fe(1), one Fe(4), and one Al(2) atom. In the nineteenth O site, O(19) is bonded in a water-like geometry to one Al(1) and one Al(4) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal planar geometry to one K(2), one Al(1), and one Al(3) atom. In the twenty-first O site, O(21) is bonded in a distorted bent 120 degrees geometry to one K(1), one Al(1), and one Si(5) atom. In the twenty-second O site, O(22) is bonded in a distorted trigonal planar geometry to one Fe(5), one Si(1), and one Si(5) atom. In the twenty-third O site, O(23) is bonded in a distorted bent 120 degrees geometry to one K(1), one Fe(5), one Al(3), and one Si(5) atom. In the twenty-fourth O site, O(24) is bonded in a distorted T-shaped geometry to one K(1), one Fe(2), and one Al(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Al4Fe5Si5(HO6)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.656
_cell_length_b   7.796
_cell_length_c   11.495
_cell_angle_alpha   78.352
_cell_angle_beta   83.756
_cell_angle_gamma   78.024
_symmetry_Int_Tables_number   1
_cell_volume   570.082
_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  0.073  0.891  0.893  1.0
  K  K1  1  0.904  0.512  0.436  1.0
  Al  Al2  1  0.957  0.538  0.708  1.0
  Al  Al3  1  0.229  0.739  0.496  1.0
  Al  Al4  1  0.492  0.555  0.704  1.0
  Al  Al5  1  0.266  0.260  0.812  1.0
  Fe  Fe6  1  0.508  0.425  0.312  1.0
  Fe  Fe7  1  0.612  0.063  0.747  1.0
  Fe  Fe8  1  0.885  0.099  0.410  1.0
  Fe  Fe9  1  0.183  0.796  0.250  1.0
  Fe  Fe10  1  0.330  0.487  0.034  1.0
  Si  Si11  1  0.824  0.433  0.132  1.0
  Si  Si12  1  0.845  0.756  0.185  1.0
  Si  Si13  1  0.486  0.094  0.224  1.0
  Si  Si14  1  0.344  0.097  0.483  1.0
  Si  Si15  1  0.670  0.691  0.894  1.0
  H  H16  1  0.400  0.214  0.555  1.0
  H  H17  1  0.417  0.787  0.069  1.0
  H  H18  1  0.861  0.281  0.987  1.0
  H  H19  1  0.745  0.899  0.583  1.0
  O  O20  1  0.678  0.620  0.220  1.0
  O  O21  1  0.816  0.306  0.277  1.0
  O  O22  1  0.285  0.341  0.942  1.0
  O  O23  1  0.997  0.573  0.103  1.0
  O  O24  1  0.377  0.883  0.527  1.0
  O  O25  1  0.445  0.310  0.170  1.0
  O  O26  1  0.510  0.319  0.737  1.0
  O  O27  1  0.010  0.856  0.414  1.0
  O  O28  1  0.294  0.733  0.091  1.0
  O  O29  1  0.658  0.900  0.905  1.0
  O  O30  1  0.691  0.961  0.175  1.0
  O  O31  1  0.527  0.118  0.366  1.0
  O  O32  1  0.758  0.022  0.587  1.0
  O  O33  1  0.109  0.189  0.448  1.0
  O  O34  1  0.283  0.010  0.233  1.0
  O  O35  1  0.903  0.255  0.068  1.0
  O  O36  1  0.213  0.604  0.641  1.0
  O  O37  1  0.311  0.605  0.383  1.0
  O  O38  1  0.020  0.313  0.762  1.0
  O  O39  1  0.729  0.599  0.628  1.0
  O  O40  1  0.897  0.648  0.828  1.0
  O  O41  1  0.650  0.542  0.022  1.0
  O  O42  1  0.471  0.652  0.834  1.0
  O  O43  1  0.343  0.044  0.775  1.0
[/CIF]
.
The material structure described by K2Fe5Al4Si5(HO6)4 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(10), one O(21), one O(23), one O(24), and one O(9) atom. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(14), one O(18), one O(2), one O(20), and one O(8) atom. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(18), one O(2), and one O(6) atom. In the second Fe site, Fe(2) is bonded to one O(10), one O(13), one O(24), and one O(7) atom to form distorted FeO4 trigonal pyramids that share  a cornercorner with one Al(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and  an edgeedge with one Al(4)O4 trigonal pyramid. In the third Fe site, Fe(3) is bonded in a 5-coordinate geometry to one O(12), one O(13), one O(14), one O(2), and one O(8) atom. In the fourth Fe site, Fe(4) is bonded in a 4-coordinate geometry to one O(15), one O(18), one O(8), and one O(9) atom. In the fifth Fe site, Fe(5) is bonded in a 6-coordinate geometry to one O(22), one O(23), one O(3), one O(4), one O(6), and one O(9) atom. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(17), one O(19), one O(20), and one O(21) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Al(3)O4 tetrahedra, and  a cornercorner with one Al(4)O4 trigonal pyramid. In the second Al site, Al(2) is bonded to one O(17), one O(18), one O(5), and one O(8) atom to form distorted AlO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra, and  a cornercorner with one Si(4)HO3 tetrahedra. In the third Al site, Al(3) is bonded to one O(17), one O(20), one O(23), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 trigonal pyramid, and  a cornercorner with one Al(4)O4 trigonal pyramid. In the fourth Al site, Al(4) is bonded to one O(19), one O(24), one O(3), and one O(7) atom to form distorted AlO4 trigonal pyramids that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra, and  an edgeedge with one Fe(2)O4 trigonal pyramid. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(16), one O(2), one O(22), and one O(4) atom to form distorted corner-sharing SiO5 trigonal bipyramids. In the second Si site, Si(2) is bonded in a 3-coordinate geometry to one O(1), one O(11), and one O(4) atom. In the third Si site, Si(3) is bonded to one O(11), one O(12), one O(15), and one O(6) atom to form corner-sharing SiO4 tetrahedra. In the fourth Si site, Si(4) is bonded to one H(1), one O(12), one O(14), and one O(5) atom to form SiHO3 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra and  a cornercorner with one Si(3)O4 tetrahedra. In the fifth Si site, Si(5) is bonded to one O(10), one O(21), one O(22), and one O(23) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra,  a cornercorner with one Si(1)O5 trigonal bipyramid, and  a cornercorner with one Fe(2)O4 trigonal pyramid. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Si(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(16) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(13) atom. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(2), one Fe(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(2), one Fe(1), one Fe(3), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Fe(5) and one Al(4) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Fe(5), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Al(2) and one Si(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(5), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Fe(2), one Al(3), and one Al(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one K(2), one Fe(3), one Fe(4), and one Al(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one K(1), one Fe(4), one Fe(5), and one H(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one K(1), one Fe(2), and one Si(5) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal pyramidal geometry to one Fe(1), one Fe(3), one Si(3), and one Si(4) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Fe(2), one Fe(3), and one H(4) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one K(2), one Fe(3), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Fe(4) and one Si(3) atom. In the sixteenth O site, O(16) is bonded in a water-like geometry to one Si(1) and one H(3) atom. In the seventeenth O site, O(17) is bonded in a trigonal planar geometry to one Al(1), one Al(2), and one Al(3) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one K(2), one Fe(1), one Fe(4), and one Al(2) atom. In the nineteenth O site, O(19) is bonded in a water-like geometry to one Al(1) and one Al(4) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal planar geometry to one K(2), one Al(1), and one Al(3) atom. In the twenty-first O site, O(21) is bonded in a distorted bent 120 degrees geometry to one K(1), one Al(1), and one Si(5) atom. In the twenty-second O site, O(22) is bonded in a distorted trigonal planar geometry to one Fe(5), one Si(1), and one Si(5) atom. In the twenty-third O site, O(23) is bonded in a distorted bent 120 degrees geometry to one K(1), one Fe(5), one Al(3), and one Si(5) atom. In the twenty-fourth O site, O(24) is bonded in a distorted T-shaped geometry to one K(1), one Fe(2), and one Al(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Al4Fe5Si5(HO6)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.656
_cell_length_b   7.796
_cell_length_c   11.495
_cell_angle_alpha   78.352
_cell_angle_beta   83.756
_cell_angle_gamma   78.024
_symmetry_Int_Tables_number   1
_cell_volume   570.082
_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  0.073  0.891  0.893  1.0
  K  K1  1  0.904  0.512  0.436  1.0
  Al  Al2  1  0.957  0.538  0.708  1.0
  Al  Al3  1  0.229  0.739  0.496  1.0
  Al  Al4  1  0.492  0.555  0.704  1.0
  Al  Al5  1  0.266  0.260  0.812  1.0
  Fe  Fe6  1  0.508  0.425  0.312  1.0
  Fe  Fe7  1  0.612  0.063  0.747  1.0
  Fe  Fe8  1  0.885  0.099  0.410  1.0
  Fe  Fe9  1  0.183  0.796  0.250  1.0
  Fe  Fe10  1  0.330  0.487  0.034  1.0
  Si  Si11  1  0.824  0.433  0.132  1.0
  Si  Si12  1  0.845  0.756  0.185  1.0
  Si  Si13  1  0.486  0.094  0.224  1.0
  Si  Si14  1  0.344  0.097  0.483  1.0
  Si  Si15  1  0.670  0.691  0.894  1.0
  H  H16  1  0.400  0.214  0.555  1.0
  H  H17  1  0.417  0.787  0.069  1.0
  H  H18  1  0.861  0.281  0.987  1.0
  H  H19  1  0.745  0.899  0.583  1.0
  O  O20  1  0.678  0.620  0.220  1.0
  O  O21  1  0.816  0.306  0.277  1.0
  O  O22  1  0.285  0.341  0.942  1.0
  O  O23  1  0.997  0.573  0.103  1.0
  O  O24  1  0.377  0.883  0.527  1.0
  O  O25  1  0.445  0.310  0.170  1.0
  O  O26  1  0.510  0.319  0.737  1.0
  O  O27  1  0.010  0.856  0.414  1.0
  O  O28  1  0.294  0.733  0.091  1.0
  O  O29  1  0.658  0.900  0.905  1.0
  O  O30  1  0.691  0.961  0.175  1.0
  O  O31  1  0.527  0.118  0.366  1.0
  O  O32  1  0.758  0.022  0.587  1.0
  O  O33  1  0.109  0.189  0.448  1.0
  O  O34  1  0.283  0.010  0.233  1.0
  O  O35  1  0.903  0.255  0.068  1.0
  O  O36  1  0.213  0.604  0.641  1.0
  O  O37  1  0.311  0.605  0.383  1.0
  O  O38  1  0.020  0.313  0.762  1.0
  O  O39  1  0.729  0.599  0.628  1.0
  O  O40  1  0.897  0.648  0.828  1.0
  O  O41  1  0.650  0.542  0.022  1.0
  O  O42  1  0.471  0.652  0.834  1.0
  O  O43  1  0.343  0.044  0.775  1.0
[/CIF]
.