The material structure described by Zr18Co5Sn4 crystallizes in the monoclinic Pm space group. There are eighteen inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 4-coordinate geometry to one Co(5), two equivalent Co(1), and one Sn(1) atom. In the second Zr site, Zr(2) is bonded in a 4-coordinate geometry to two equivalent Co(2), one Sn(2), and one Sn(4) atom. In the third Zr site, Zr(3) is bonded in a 4-coordinate geometry to one Co(4), two equivalent Co(3), and one Sn(3) atom. In the fourth Zr site, Zr(4) is bonded in a 4-coordinate geometry to two equivalent Co(2), one Sn(1), and one Sn(4) atom. In the fifth Zr site, Zr(5) is bonded in a 4-coordinate geometry to one Co(4), two equivalent Co(3), and one Sn(2) atom. In the sixth Zr site, Zr(6) is bonded in a 4-coordinate geometry to one Co(5), two equivalent Co(1), and one Sn(3) atom. In the seventh Zr site, Zr(7) is bonded in a 4-coordinate geometry to two equivalent Co(1), one Sn(1), and one Sn(4) atom. In the eighth Zr site, Zr(8) is bonded in a 2-coordinate geometry to one Co(4), two equivalent Co(2), and one Sn(2) atom. In the ninth Zr site, Zr(9) is bonded in a 4-coordinate geometry to one Co(5), two equivalent Co(3), and one Sn(3) atom. In the tenth Zr site, Zr(10) is bonded in a 4-coordinate geometry to two equivalent Sn(2) and two equivalent Sn(4) atoms. In the eleventh Zr site, Zr(11) is bonded in a 4-coordinate geometry to two equivalent Co(4) and two equivalent Sn(3) atoms. In the twelfth Zr site, Zr(12) is bonded in a 4-coordinate geometry to two equivalent Co(5) and two equivalent Sn(1) atoms. In the thirteenth Zr site, Zr(13) is bonded in a 4-coordinate geometry to two equivalent Sn(1) and two equivalent Sn(4) atoms. In the fourteenth Zr site, Zr(14) is bonded in a 4-coordinate geometry to two equivalent Co(4) and two equivalent Sn(2) atoms. In the fifteenth Zr site, Zr(15) is bonded in a 2-coordinate geometry to two equivalent Co(5) and two equivalent Sn(3) atoms. In the sixteenth Zr site, Zr(16) is bonded in a 4-coordinate geometry to two equivalent Sn(1) and two equivalent Sn(4) atoms. In the seventeenth Zr site, Zr(17) is bonded in a 2-coordinate geometry to two equivalent Co(4) and two equivalent Sn(2) atoms. In the eighteenth Zr site, Zr(18) is bonded in a 2-coordinate geometry to two equivalent Co(5) and two equivalent Sn(3) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 6-coordinate geometry to two equivalent Zr(1), two equivalent Zr(6), and two equivalent Zr(7) atoms. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to two equivalent Zr(2), two equivalent Zr(4), and two equivalent Zr(8) atoms. In the third Co site, Co(3) is bonded in a 6-coordinate geometry to two equivalent Zr(3), two equivalent Zr(5), and two equivalent Zr(9) atoms. In the fourth Co site, Co(4) is bonded in a 9-coordinate geometry to one Zr(3), one Zr(5), one Zr(8), two equivalent Zr(11), two equivalent Zr(14), and two equivalent Zr(17) atoms. In the fifth Co site, Co(5) is bonded in a 9-coordinate geometry to one Zr(1), one Zr(6), one Zr(9), two equivalent Zr(12), two equivalent Zr(15), and two equivalent Zr(18) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to one Zr(1), one Zr(4), one Zr(7), two equivalent Zr(12), two equivalent Zr(13), and two equivalent Zr(16) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to one Zr(2), one Zr(5), one Zr(8), two equivalent Zr(10), two equivalent Zr(14), and two equivalent Zr(17) atoms. In the third Sn site, Sn(3) is bonded in a 9-coordinate geometry to one Zr(3), one Zr(6), one Zr(9), two equivalent Zr(11), two equivalent Zr(15), and two equivalent Zr(18) atoms. In the fourth Sn site, Sn(4) is bonded in a 9-coordinate geometry to one Zr(2), one Zr(4), one Zr(7), two equivalent Zr(10), two equivalent Zr(13), and two equivalent Zr(16) atoms. is represented by the CIF file [CIF]
data_Zr18Co5Sn4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.349
_cell_length_b   8.013
_cell_length_c   21.199
_cell_angle_alpha   79.116
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   558.728
_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
  Zr  Zr0  1  0.000  0.757  0.001  1.0
  Zr  Zr1  1  0.000  0.422  0.665  1.0
  Zr  Zr2  1  0.000  0.089  0.332  1.0
  Zr  Zr3  1  0.000  0.746  0.748  1.0
  Zr  Zr4  1  0.000  0.412  0.414  1.0
  Zr  Zr5  1  0.000  0.077  0.083  1.0
  Zr  Zr6  1  0.000  0.163  0.920  1.0
  Zr  Zr7  1  0.000  0.831  0.585  1.0
  Zr  Zr8  1  0.000  0.500  0.253  1.0
  Zr  Zr9  1  0.500  0.063  0.666  1.0
  Zr  Zr10  1  0.500  0.739  0.349  1.0
  Zr  Zr11  1  0.500  0.405  0.016  1.0
  Zr  Zr12  1  0.500  0.867  0.869  1.0
  Zr  Zr13  1  0.500  0.568  0.520  1.0
  Zr  Zr14  1  0.500  0.236  0.188  1.0
  Zr  Zr15  1  0.500  0.404  0.799  1.0
  Zr  Zr16  1  0.500  0.027  0.462  1.0
  Zr  Zr17  1  0.500  0.691  0.131  1.0
  Co  Co18  1  0.500  0.002  0.001  1.0
  Co  Co19  1  0.500  0.666  0.665  1.0
  Co  Co20  1  0.500  0.334  0.333  1.0
  Co  Co21  1  0.000  0.778  0.445  1.0
  Co  Co22  1  0.000  0.444  0.111  1.0
  Sn  Sn23  1  0.000  0.549  0.894  1.0
  Sn  Sn24  1  0.000  0.228  0.551  1.0
  Sn  Sn25  1  0.000  0.889  0.222  1.0
  Sn  Sn26  1  0.000  0.111  0.778  1.0
[/CIF]
.
The material structure described by Zr18Co5Sn4 crystallizes in the monoclinic Pm space group. There are eighteen inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 4-coordinate geometry to one Co(5), two equivalent Co(1), and one Sn(1) atom. In the second Zr site, Zr(2) is bonded in a 4-coordinate geometry to two equivalent Co(2), one Sn(2), and one Sn(4) atom. In the third Zr site, Zr(3) is bonded in a 4-coordinate geometry to one Co(4), two equivalent Co(3), and one Sn(3) atom. In the fourth Zr site, Zr(4) is bonded in a 4-coordinate geometry to two equivalent Co(2), one Sn(1), and one Sn(4) atom. In the fifth Zr site, Zr(5) is bonded in a 4-coordinate geometry to one Co(4), two equivalent Co(3), and one Sn(2) atom. In the sixth Zr site, Zr(6) is bonded in a 4-coordinate geometry to one Co(5), two equivalent Co(1), and one Sn(3) atom. In the seventh Zr site, Zr(7) is bonded in a 4-coordinate geometry to two equivalent Co(1), one Sn(1), and one Sn(4) atom. In the eighth Zr site, Zr(8) is bonded in a 2-coordinate geometry to one Co(4), two equivalent Co(2), and one Sn(2) atom. In the ninth Zr site, Zr(9) is bonded in a 4-coordinate geometry to one Co(5), two equivalent Co(3), and one Sn(3) atom. In the tenth Zr site, Zr(10) is bonded in a 4-coordinate geometry to two equivalent Sn(2) and two equivalent Sn(4) atoms. In the eleventh Zr site, Zr(11) is bonded in a 4-coordinate geometry to two equivalent Co(4) and two equivalent Sn(3) atoms. In the twelfth Zr site, Zr(12) is bonded in a 4-coordinate geometry to two equivalent Co(5) and two equivalent Sn(1) atoms. In the thirteenth Zr site, Zr(13) is bonded in a 4-coordinate geometry to two equivalent Sn(1) and two equivalent Sn(4) atoms. In the fourteenth Zr site, Zr(14) is bonded in a 4-coordinate geometry to two equivalent Co(4) and two equivalent Sn(2) atoms. In the fifteenth Zr site, Zr(15) is bonded in a 2-coordinate geometry to two equivalent Co(5) and two equivalent Sn(3) atoms. In the sixteenth Zr site, Zr(16) is bonded in a 4-coordinate geometry to two equivalent Sn(1) and two equivalent Sn(4) atoms. In the seventeenth Zr site, Zr(17) is bonded in a 2-coordinate geometry to two equivalent Co(4) and two equivalent Sn(2) atoms. In the eighteenth Zr site, Zr(18) is bonded in a 2-coordinate geometry to two equivalent Co(5) and two equivalent Sn(3) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 6-coordinate geometry to two equivalent Zr(1), two equivalent Zr(6), and two equivalent Zr(7) atoms. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to two equivalent Zr(2), two equivalent Zr(4), and two equivalent Zr(8) atoms. In the third Co site, Co(3) is bonded in a 6-coordinate geometry to two equivalent Zr(3), two equivalent Zr(5), and two equivalent Zr(9) atoms. In the fourth Co site, Co(4) is bonded in a 9-coordinate geometry to one Zr(3), one Zr(5), one Zr(8), two equivalent Zr(11), two equivalent Zr(14), and two equivalent Zr(17) atoms. In the fifth Co site, Co(5) is bonded in a 9-coordinate geometry to one Zr(1), one Zr(6), one Zr(9), two equivalent Zr(12), two equivalent Zr(15), and two equivalent Zr(18) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to one Zr(1), one Zr(4), one Zr(7), two equivalent Zr(12), two equivalent Zr(13), and two equivalent Zr(16) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to one Zr(2), one Zr(5), one Zr(8), two equivalent Zr(10), two equivalent Zr(14), and two equivalent Zr(17) atoms. In the third Sn site, Sn(3) is bonded in a 9-coordinate geometry to one Zr(3), one Zr(6), one Zr(9), two equivalent Zr(11), two equivalent Zr(15), and two equivalent Zr(18) atoms. In the fourth Sn site, Sn(4) is bonded in a 9-coordinate geometry to one Zr(2), one Zr(4), one Zr(7), two equivalent Zr(10), two equivalent Zr(13), and two equivalent Zr(16) atoms. is represented by the CIF file [CIF]
data_Zr18Co5Sn4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.349
_cell_length_b   8.013
_cell_length_c   21.199
_cell_angle_alpha   79.116
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   558.728
_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
  Zr  Zr0  1  0.000  0.757  0.001  1.0
  Zr  Zr1  1  0.000  0.422  0.665  1.0
  Zr  Zr2  1  0.000  0.089  0.332  1.0
  Zr  Zr3  1  0.000  0.746  0.748  1.0
  Zr  Zr4  1  0.000  0.412  0.414  1.0
  Zr  Zr5  1  0.000  0.077  0.083  1.0
  Zr  Zr6  1  0.000  0.163  0.920  1.0
  Zr  Zr7  1  0.000  0.831  0.585  1.0
  Zr  Zr8  1  0.000  0.500  0.253  1.0
  Zr  Zr9  1  0.500  0.063  0.666  1.0
  Zr  Zr10  1  0.500  0.739  0.349  1.0
  Zr  Zr11  1  0.500  0.405  0.016  1.0
  Zr  Zr12  1  0.500  0.867  0.869  1.0
  Zr  Zr13  1  0.500  0.568  0.520  1.0
  Zr  Zr14  1  0.500  0.236  0.188  1.0
  Zr  Zr15  1  0.500  0.404  0.799  1.0
  Zr  Zr16  1  0.500  0.027  0.462  1.0
  Zr  Zr17  1  0.500  0.691  0.131  1.0
  Co  Co18  1  0.500  0.002  0.001  1.0
  Co  Co19  1  0.500  0.666  0.665  1.0
  Co  Co20  1  0.500  0.334  0.333  1.0
  Co  Co21  1  0.000  0.778  0.445  1.0
  Co  Co22  1  0.000  0.444  0.111  1.0
  Sn  Sn23  1  0.000  0.549  0.894  1.0
  Sn  Sn24  1  0.000  0.228  0.551  1.0
  Sn  Sn25  1  0.000  0.889  0.222  1.0
  Sn  Sn26  1  0.000  0.111  0.778  1.0
[/CIF]
.