The material structure described by Li9Co7O16 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/m space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form LiO6 octahedra that share corners with six equivalent Co(2)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-12°. In the second Li site, Li(2) is bonded to one O(1), one O(3), and four equivalent O(2) atoms to form LiO6 octahedra that share  a cornercorner with one Li(4)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(3)O6 octahedra, corners with two equivalent Co(4)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-8°. In the third Li site, Li(3) is bonded to one O(4), one O(5), and four equivalent O(6) atoms to form LiO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Li(4)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the fourth Li site, Li(4) is bonded to two equivalent O(3) and four equivalent O(6) atoms to form LiO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Li(3)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-10°. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and four equivalent O(6) atoms to form CoO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Li(3)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-4°. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share corners with six equivalent Li(1)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-12°. In the third Co site, Co(3) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with two equivalent Li(3)O6 octahedra, corners with four equivalent Li(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-8°. In the fourth Co site, Co(4) is bonded to two equivalent O(5) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with two equivalent Li(3)O6 octahedra, corners with four equivalent Li(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles are 6°. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), two equivalent Li(1), one Co(1), and two equivalent Co(2) atoms to form OLi3Co3 octahedra that share  a cornercorner with one O(1)Li3Co3 octahedra,  a cornercorner with one O(3)Li4Co2 octahedra, corners with two equivalent O(4)Li3Co3 octahedra, corners with two equivalent O(5)Li3Co3 octahedra,  an edgeedge with one O(4)Li3Co3 octahedra,  an edgeedge with one O(5)Li3Co3 octahedra, edges with two equivalent O(3)Li4Co2 octahedra, edges with four equivalent O(2)Li3Co3 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second O site, O(2) is bonded to one Li(1), two equivalent Li(2), one Co(2), one Co(3), and one Co(4) atom to form OLi3Co3 octahedra that share corners with two equivalent O(6)Li4Co2 octahedra, corners with four equivalent O(2)Li3Co3 octahedra, edges with two equivalent O(1)Li3Co3 octahedra, edges with two equivalent O(4)Li3Co3 octahedra, edges with two equivalent O(5)Li3Co3 octahedra, edges with two equivalent O(3)Li4Co2 octahedra, and edges with four equivalent O(2)Li3Co3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the third O site, O(3) is bonded to one Li(2), one Li(4), two equivalent Li(1), and two equivalent Co(2) atoms to form OLi4Co2 octahedra that share  a cornercorner with one O(1)Li3Co3 octahedra,  a cornercorner with one O(3)Li4Co2 octahedra, corners with two equivalent O(4)Li3Co3 octahedra, corners with two equivalent O(5)Li3Co3 octahedra,  an edgeedge with one O(4)Li3Co3 octahedra,  an edgeedge with one O(5)Li3Co3 octahedra, edges with two equivalent O(1)Li3Co3 octahedra, edges with four equivalent O(2)Li3Co3 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-9°. In the fourth O site, O(4) is bonded to one Li(3), two equivalent Li(1), one Co(3), and two equivalent Co(2) atoms to form OLi3Co3 octahedra that share  a cornercorner with one O(4)Li3Co3 octahedra,  a cornercorner with one O(5)Li3Co3 octahedra, corners with two equivalent O(1)Li3Co3 octahedra, corners with two equivalent O(3)Li4Co2 octahedra,  an edgeedge with one O(1)Li3Co3 octahedra,  an edgeedge with one O(3)Li4Co2 octahedra, edges with two equivalent O(5)Li3Co3 octahedra, edges with four equivalent O(2)Li3Co3 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the fifth O site, O(5) is bonded to one Li(3), two equivalent Li(1), one Co(4), and two equivalent Co(2) atoms to form OLi3Co3 octahedra that share  a cornercorner with one O(4)Li3Co3 octahedra,  a cornercorner with one O(5)Li3Co3 octahedra, corners with two equivalent O(1)Li3Co3 octahedra, corners with two equivalent O(3)Li4Co2 octahedra,  an edgeedge with one O(1)Li3Co3 octahedra,  an edgeedge with one O(3)Li4Co2 octahedra, edges with two equivalent O(4)Li3Co3 octahedra, edges with four equivalent O(2)Li3Co3 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-9°. In the sixth O site, O(6) is bonded to one Li(1), one Li(4), two equivalent Li(3), one Co(1), and one Co(2) atom to form OLi4Co2 octahedra that share corners with two equivalent O(2)Li3Co3 octahedra, corners with four equivalent O(6)Li4Co2 octahedra, edges with two equivalent O(1)Li3Co3 octahedra, edges with two equivalent O(4)Li3Co3 octahedra, edges with two equivalent O(5)Li3Co3 octahedra, edges with two equivalent O(3)Li4Co2 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. is represented by the CIF file [CIF]
data_Li9Co7O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.508
_cell_length_b   6.508
_cell_length_c   10.102
_cell_angle_alpha   59.183
_cell_angle_beta   59.183
_cell_angle_gamma   52.549
_symmetry_Int_Tables_number   1
_cell_volume   278.767
_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
  Li  Li0  1  0.008  0.501  0.244  1.0
  Li  Li1  1  0.749  0.749  0.499  1.0
  Li  Li2  1  0.501  0.008  0.244  1.0
  Li  Li3  1  0.251  0.251  0.501  1.0
  Li  Li4  1  0.499  0.992  0.756  1.0
  Li  Li5  1  0.992  0.499  0.756  1.0
  Li  Li6  1  0.251  0.251  0.000  1.0
  Li  Li7  1  0.749  0.749  1.000  1.0
  Li  Li8  1  0.500  0.500  0.000  1.0
  Co  Co9  1  0.000  0.000  0.000  1.0
  Co  Co10  1  0.745  0.255  0.244  1.0
  Co  Co11  1  0.500  0.500  0.500  1.0
  Co  Co12  1  0.255  0.745  0.756  1.0
  Co  Co13  1  0.255  0.745  0.244  1.0
  Co  Co14  1  0.000  0.000  0.500  1.0
  Co  Co15  1  0.745  0.255  0.756  1.0
  O  O16  1  0.886  0.886  0.234  1.0
  O  O17  1  0.645  0.138  0.497  1.0
  O  O18  1  0.382  0.382  0.256  1.0
  O  O19  1  0.138  0.645  0.497  1.0
  O  O20  1  0.387  0.387  0.734  1.0
  O  O21  1  0.892  0.892  0.732  1.0
  O  O22  1  0.117  0.658  0.992  1.0
  O  O23  1  0.658  0.117  0.992  1.0
  O  O24  1  0.108  0.108  0.268  1.0
  O  O25  1  0.862  0.355  0.503  1.0
  O  O26  1  0.613  0.613  0.266  1.0
  O  O27  1  0.355  0.862  0.503  1.0
  O  O28  1  0.618  0.618  0.744  1.0
  O  O29  1  0.114  0.114  0.766  1.0
  O  O30  1  0.342  0.883  0.008  1.0
  O  O31  1  0.883  0.342  0.008  1.0
[/CIF]
.
The material structure described by Li9Co7O16 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/m space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form LiO6 octahedra that share corners with six equivalent Co(2)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-12°. In the second Li site, Li(2) is bonded to one O(1), one O(3), and four equivalent O(2) atoms to form LiO6 octahedra that share  a cornercorner with one Li(4)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(3)O6 octahedra, corners with two equivalent Co(4)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-8°. In the third Li site, Li(3) is bonded to one O(4), one O(5), and four equivalent O(6) atoms to form LiO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Li(4)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the fourth Li site, Li(4) is bonded to two equivalent O(3) and four equivalent O(6) atoms to form LiO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Li(3)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-10°. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and four equivalent O(6) atoms to form CoO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Li(3)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-4°. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share corners with six equivalent Li(1)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-12°. In the third Co site, Co(3) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with two equivalent Li(3)O6 octahedra, corners with four equivalent Li(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-8°. In the fourth Co site, Co(4) is bonded to two equivalent O(5) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with two equivalent Li(3)O6 octahedra, corners with four equivalent Li(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles are 6°. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), two equivalent Li(1), one Co(1), and two equivalent Co(2) atoms to form OLi3Co3 octahedra that share  a cornercorner with one O(1)Li3Co3 octahedra,  a cornercorner with one O(3)Li4Co2 octahedra, corners with two equivalent O(4)Li3Co3 octahedra, corners with two equivalent O(5)Li3Co3 octahedra,  an edgeedge with one O(4)Li3Co3 octahedra,  an edgeedge with one O(5)Li3Co3 octahedra, edges with two equivalent O(3)Li4Co2 octahedra, edges with four equivalent O(2)Li3Co3 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second O site, O(2) is bonded to one Li(1), two equivalent Li(2), one Co(2), one Co(3), and one Co(4) atom to form OLi3Co3 octahedra that share corners with two equivalent O(6)Li4Co2 octahedra, corners with four equivalent O(2)Li3Co3 octahedra, edges with two equivalent O(1)Li3Co3 octahedra, edges with two equivalent O(4)Li3Co3 octahedra, edges with two equivalent O(5)Li3Co3 octahedra, edges with two equivalent O(3)Li4Co2 octahedra, and edges with four equivalent O(2)Li3Co3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the third O site, O(3) is bonded to one Li(2), one Li(4), two equivalent Li(1), and two equivalent Co(2) atoms to form OLi4Co2 octahedra that share  a cornercorner with one O(1)Li3Co3 octahedra,  a cornercorner with one O(3)Li4Co2 octahedra, corners with two equivalent O(4)Li3Co3 octahedra, corners with two equivalent O(5)Li3Co3 octahedra,  an edgeedge with one O(4)Li3Co3 octahedra,  an edgeedge with one O(5)Li3Co3 octahedra, edges with two equivalent O(1)Li3Co3 octahedra, edges with four equivalent O(2)Li3Co3 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-9°. In the fourth O site, O(4) is bonded to one Li(3), two equivalent Li(1), one Co(3), and two equivalent Co(2) atoms to form OLi3Co3 octahedra that share  a cornercorner with one O(4)Li3Co3 octahedra,  a cornercorner with one O(5)Li3Co3 octahedra, corners with two equivalent O(1)Li3Co3 octahedra, corners with two equivalent O(3)Li4Co2 octahedra,  an edgeedge with one O(1)Li3Co3 octahedra,  an edgeedge with one O(3)Li4Co2 octahedra, edges with two equivalent O(5)Li3Co3 octahedra, edges with four equivalent O(2)Li3Co3 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the fifth O site, O(5) is bonded to one Li(3), two equivalent Li(1), one Co(4), and two equivalent Co(2) atoms to form OLi3Co3 octahedra that share  a cornercorner with one O(4)Li3Co3 octahedra,  a cornercorner with one O(5)Li3Co3 octahedra, corners with two equivalent O(1)Li3Co3 octahedra, corners with two equivalent O(3)Li4Co2 octahedra,  an edgeedge with one O(1)Li3Co3 octahedra,  an edgeedge with one O(3)Li4Co2 octahedra, edges with two equivalent O(4)Li3Co3 octahedra, edges with four equivalent O(2)Li3Co3 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-9°. In the sixth O site, O(6) is bonded to one Li(1), one Li(4), two equivalent Li(3), one Co(1), and one Co(2) atom to form OLi4Co2 octahedra that share corners with two equivalent O(2)Li3Co3 octahedra, corners with four equivalent O(6)Li4Co2 octahedra, edges with two equivalent O(1)Li3Co3 octahedra, edges with two equivalent O(4)Li3Co3 octahedra, edges with two equivalent O(5)Li3Co3 octahedra, edges with two equivalent O(3)Li4Co2 octahedra, and edges with four equivalent O(6)Li4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. is represented by the CIF file [CIF]
data_Li9Co7O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.508
_cell_length_b   6.508
_cell_length_c   10.102
_cell_angle_alpha   59.183
_cell_angle_beta   59.183
_cell_angle_gamma   52.549
_symmetry_Int_Tables_number   1
_cell_volume   278.767
_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
  Li  Li0  1  0.008  0.501  0.244  1.0
  Li  Li1  1  0.749  0.749  0.499  1.0
  Li  Li2  1  0.501  0.008  0.244  1.0
  Li  Li3  1  0.251  0.251  0.501  1.0
  Li  Li4  1  0.499  0.992  0.756  1.0
  Li  Li5  1  0.992  0.499  0.756  1.0
  Li  Li6  1  0.251  0.251  0.000  1.0
  Li  Li7  1  0.749  0.749  1.000  1.0
  Li  Li8  1  0.500  0.500  0.000  1.0
  Co  Co9  1  0.000  0.000  0.000  1.0
  Co  Co10  1  0.745  0.255  0.244  1.0
  Co  Co11  1  0.500  0.500  0.500  1.0
  Co  Co12  1  0.255  0.745  0.756  1.0
  Co  Co13  1  0.255  0.745  0.244  1.0
  Co  Co14  1  0.000  0.000  0.500  1.0
  Co  Co15  1  0.745  0.255  0.756  1.0
  O  O16  1  0.886  0.886  0.234  1.0
  O  O17  1  0.645  0.138  0.497  1.0
  O  O18  1  0.382  0.382  0.256  1.0
  O  O19  1  0.138  0.645  0.497  1.0
  O  O20  1  0.387  0.387  0.734  1.0
  O  O21  1  0.892  0.892  0.732  1.0
  O  O22  1  0.117  0.658  0.992  1.0
  O  O23  1  0.658  0.117  0.992  1.0
  O  O24  1  0.108  0.108  0.268  1.0
  O  O25  1  0.862  0.355  0.503  1.0
  O  O26  1  0.613  0.613  0.266  1.0
  O  O27  1  0.355  0.862  0.503  1.0
  O  O28  1  0.618  0.618  0.744  1.0
  O  O29  1  0.114  0.114  0.766  1.0
  O  O30  1  0.342  0.883  0.008  1.0
  O  O31  1  0.883  0.342  0.008  1.0
[/CIF]
.