The material structure described by Ca3(TaN2)2 crystallizes in the orthorhombic Pnna space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 5-coordinate geometry to two equivalent N(1) and three equivalent N(2) atoms. In the second Ca site, Ca(2) is bonded in a 4-coordinate geometry to two equivalent N(1) and two equivalent N(2) atoms. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing TaN4 tetrahedra. In the second Ta site, Ta(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing TaN4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), one Ta(1), and one Ta(2) atom. In the second N site, N(2) is bonded to one Ca(2), three equivalent Ca(1), one Ta(1), and one Ta(2) atom to form a mixture of face, edge, and corner-sharing NCa4Ta2 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca3(TaN2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.155
_cell_length_b   10.334
_cell_length_c   9.386
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   597.002
_cell_formula_units_Z   4
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
  Ca  Ca0  1  0.616  0.153  0.426  1.0
  Ca  Ca1  1  0.884  0.847  0.426  1.0
  Ca  Ca2  1  0.616  0.347  0.074  1.0
  Ca  Ca3  1  0.884  0.653  0.074  1.0
  Ca  Ca4  1  0.384  0.847  0.574  1.0
  Ca  Ca5  1  0.116  0.153  0.574  1.0
  Ca  Ca6  1  0.384  0.653  0.926  1.0
  Ca  Ca7  1  0.116  0.347  0.926  1.0
  Ca  Ca8  1  0.750  0.500  0.391  1.0
  Ca  Ca9  1  0.750  0.000  0.109  1.0
  Ca  Ca10  1  0.250  0.500  0.609  1.0
  Ca  Ca11  1  0.250  0.000  0.891  1.0
  Ta  Ta12  1  0.750  0.500  0.727  1.0
  Ta  Ta13  1  0.750  0.000  0.773  1.0
  Ta  Ta14  1  0.250  0.500  0.273  1.0
  Ta  Ta15  1  0.250  0.000  0.227  1.0
  Ta  Ta16  1  0.575  0.250  0.750  1.0
  Ta  Ta17  1  0.925  0.750  0.750  1.0
  Ta  Ta18  1  0.425  0.750  0.250  1.0
  Ta  Ta19  1  0.075  0.250  0.250  1.0
  N  N20  1  0.767  0.340  0.604  1.0
  N  N21  1  0.733  0.660  0.604  1.0
  N  N22  1  0.767  0.160  0.896  1.0
  N  N23  1  0.733  0.840  0.896  1.0
  N  N24  1  0.233  0.660  0.396  1.0
  N  N25  1  0.267  0.340  0.396  1.0
  N  N26  1  0.233  0.840  0.104  1.0
  N  N27  1  0.267  0.160  0.104  1.0
  N  N28  1  0.487  0.433  0.836  1.0
  N  N29  1  0.013  0.567  0.836  1.0
  N  N30  1  0.487  0.067  0.664  1.0
  N  N31  1  0.013  0.933  0.664  1.0
  N  N32  1  0.513  0.567  0.164  1.0
  N  N33  1  0.987  0.433  0.164  1.0
  N  N34  1  0.513  0.933  0.336  1.0
  N  N35  1  0.987  0.067  0.336  1.0
[/CIF]
.
The material structure described by Ca3(TaN2)2 crystallizes in the orthorhombic Pnna space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 5-coordinate geometry to two equivalent N(1) and three equivalent N(2) atoms. In the second Ca site, Ca(2) is bonded in a 4-coordinate geometry to two equivalent N(1) and two equivalent N(2) atoms. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing TaN4 tetrahedra. In the second Ta site, Ta(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing TaN4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), one Ta(1), and one Ta(2) atom. In the second N site, N(2) is bonded to one Ca(2), three equivalent Ca(1), one Ta(1), and one Ta(2) atom to form a mixture of face, edge, and corner-sharing NCa4Ta2 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca3(TaN2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.155
_cell_length_b   10.334
_cell_length_c   9.386
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   597.002
_cell_formula_units_Z   4
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
  Ca  Ca0  1  0.616  0.153  0.426  1.0
  Ca  Ca1  1  0.884  0.847  0.426  1.0
  Ca  Ca2  1  0.616  0.347  0.074  1.0
  Ca  Ca3  1  0.884  0.653  0.074  1.0
  Ca  Ca4  1  0.384  0.847  0.574  1.0
  Ca  Ca5  1  0.116  0.153  0.574  1.0
  Ca  Ca6  1  0.384  0.653  0.926  1.0
  Ca  Ca7  1  0.116  0.347  0.926  1.0
  Ca  Ca8  1  0.750  0.500  0.391  1.0
  Ca  Ca9  1  0.750  0.000  0.109  1.0
  Ca  Ca10  1  0.250  0.500  0.609  1.0
  Ca  Ca11  1  0.250  0.000  0.891  1.0
  Ta  Ta12  1  0.750  0.500  0.727  1.0
  Ta  Ta13  1  0.750  0.000  0.773  1.0
  Ta  Ta14  1  0.250  0.500  0.273  1.0
  Ta  Ta15  1  0.250  0.000  0.227  1.0
  Ta  Ta16  1  0.575  0.250  0.750  1.0
  Ta  Ta17  1  0.925  0.750  0.750  1.0
  Ta  Ta18  1  0.425  0.750  0.250  1.0
  Ta  Ta19  1  0.075  0.250  0.250  1.0
  N  N20  1  0.767  0.340  0.604  1.0
  N  N21  1  0.733  0.660  0.604  1.0
  N  N22  1  0.767  0.160  0.896  1.0
  N  N23  1  0.733  0.840  0.896  1.0
  N  N24  1  0.233  0.660  0.396  1.0
  N  N25  1  0.267  0.340  0.396  1.0
  N  N26  1  0.233  0.840  0.104  1.0
  N  N27  1  0.267  0.160  0.104  1.0
  N  N28  1  0.487  0.433  0.836  1.0
  N  N29  1  0.013  0.567  0.836  1.0
  N  N30  1  0.487  0.067  0.664  1.0
  N  N31  1  0.013  0.933  0.664  1.0
  N  N32  1  0.513  0.567  0.164  1.0
  N  N33  1  0.987  0.433  0.164  1.0
  N  N34  1  0.513  0.933  0.336  1.0
  N  N35  1  0.987  0.067  0.336  1.0
[/CIF]
.