The material described by La2Si4N6C crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 5-coordinate geometry to one N(1), two equivalent N(2), and two equivalent N(3) atoms. In the second La site, La(2) is bonded in a 7-coordinate geometry to two equivalent N(2), two equivalent N(3), and three equivalent N(4) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a water-like geometry to two equivalent N(3) atoms. In the second Si site, Si(2) is bonded in a bent 120 degrees geometry to one N(1) and one N(2) atom. In the third Si site, Si(3) is bonded in a water-like geometry to two equivalent N(2) atoms. C(1) is bonded in a trigonal planar geometry to one N(4) and two equivalent N(3) atoms. There are four inequivalent N sites. In the first N site, N(3) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Si(1), and one C(1) atom. In the second N site, N(4) is bonded in a 4-coordinate geometry to three equivalent La(2) and one C(1) atom. In the third N site, N(1) is bonded in a distorted trigonal planar geometry to one La(1) and two equivalent Si(2) atoms. In the fourth N site, N(2) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Si(2), and one Si(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_La2Si4CN6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.250
_cell_length_b   11.607
_cell_length_c   13.535
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   824.711
_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
  La  La0  1  0.250  0.915  0.861  1.0
  La  La1  1  0.750  0.076  0.587  1.0
  La  La2  1  0.250  0.424  0.087  1.0
  La  La3  1  0.750  0.576  0.913  1.0
  La  La4  1  0.250  0.415  0.639  1.0
  La  La5  1  0.250  0.924  0.413  1.0
  La  La6  1  0.750  0.585  0.361  1.0
  La  La7  1  0.750  0.085  0.139  1.0
  Si  Si8  1  0.250  0.165  1.000  1.0
  Si  Si9  1  0.250  0.665  0.500  1.0
  Si  Si10  1  0.006  0.300  0.317  1.0
  Si  Si11  1  0.750  0.474  0.701  1.0
  Si  Si12  1  0.994  0.200  0.817  1.0
  Si  Si13  1  0.250  0.526  0.299  1.0
  Si  Si14  1  0.994  0.700  0.683  1.0
  Si  Si15  1  0.750  0.835  0.000  1.0
  Si  Si16  1  0.494  0.800  0.183  1.0
  Si  Si17  1  0.750  0.974  0.799  1.0
  Si  Si18  1  0.506  0.200  0.817  1.0
  Si  Si19  1  0.750  0.335  0.500  1.0
  Si  Si20  1  0.250  0.026  0.201  1.0
  Si  Si21  1  0.006  0.800  0.183  1.0
  Si  Si22  1  0.494  0.300  0.317  1.0
  Si  Si23  1  0.506  0.700  0.683  1.0
  C  C24  1  0.250  0.196  0.529  1.0
  C  C25  1  0.750  0.304  0.029  1.0
  C  C26  1  0.250  0.696  0.971  1.0
  C  C27  1  0.750  0.804  0.471  1.0
  N  N28  1  0.750  0.214  0.285  1.0
  N  N29  1  0.501  0.063  0.770  1.0
  N  N30  1  0.999  0.563  0.730  1.0
  N  N31  1  0.499  0.437  0.270  1.0
  N  N32  1  0.750  0.714  0.215  1.0
  N  N33  1  0.981  0.244  0.041  1.0
  N  N34  1  0.499  0.937  0.230  1.0
  N  N35  1  0.999  0.063  0.770  1.0
  N  N36  1  0.001  0.437  0.270  1.0
  N  N37  1  0.519  0.744  0.459  1.0
  N  N38  1  0.019  0.256  0.541  1.0
  N  N39  1  0.519  0.244  0.041  1.0
  N  N40  1  0.250  0.786  0.715  1.0
  N  N41  1  0.250  0.286  0.785  1.0
  N  N42  1  0.250  0.083  0.519  1.0
  N  N43  1  0.019  0.756  0.959  1.0
  N  N44  1  0.981  0.744  0.459  1.0
  N  N45  1  0.750  0.917  0.481  1.0
  N  N46  1  0.501  0.563  0.730  1.0
  N  N47  1  0.481  0.256  0.541  1.0
  N  N48  1  0.481  0.756  0.959  1.0
  N  N49  1  0.250  0.583  0.981  1.0
  N  N50  1  0.750  0.417  0.019  1.0
  N  N51  1  0.001  0.937  0.230  1.0
[/CIF]
.
The material described by La2Si4N6C crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 5-coordinate geometry to one N(1), two equivalent N(2), and two equivalent N(3) atoms. In the second La site, La(2) is bonded in a 7-coordinate geometry to two equivalent N(2), two equivalent N(3), and three equivalent N(4) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a water-like geometry to two equivalent N(3) atoms. In the second Si site, Si(2) is bonded in a bent 120 degrees geometry to one N(1) and one N(2) atom. In the third Si site, Si(3) is bonded in a water-like geometry to two equivalent N(2) atoms. C(1) is bonded in a trigonal planar geometry to one N(4) and two equivalent N(3) atoms. There are four inequivalent N sites. In the first N site, N(3) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Si(1), and one C(1) atom. In the second N site, N(4) is bonded in a 4-coordinate geometry to three equivalent La(2) and one C(1) atom. In the third N site, N(1) is bonded in a distorted trigonal planar geometry to one La(1) and two equivalent Si(2) atoms. In the fourth N site, N(2) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Si(2), and one Si(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_La2Si4CN6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.250
_cell_length_b   11.607
_cell_length_c   13.535
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   824.711
_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
  La  La0  1  0.250  0.915  0.861  1.0
  La  La1  1  0.750  0.076  0.587  1.0
  La  La2  1  0.250  0.424  0.087  1.0
  La  La3  1  0.750  0.576  0.913  1.0
  La  La4  1  0.250  0.415  0.639  1.0
  La  La5  1  0.250  0.924  0.413  1.0
  La  La6  1  0.750  0.585  0.361  1.0
  La  La7  1  0.750  0.085  0.139  1.0
  Si  Si8  1  0.250  0.165  1.000  1.0
  Si  Si9  1  0.250  0.665  0.500  1.0
  Si  Si10  1  0.006  0.300  0.317  1.0
  Si  Si11  1  0.750  0.474  0.701  1.0
  Si  Si12  1  0.994  0.200  0.817  1.0
  Si  Si13  1  0.250  0.526  0.299  1.0
  Si  Si14  1  0.994  0.700  0.683  1.0
  Si  Si15  1  0.750  0.835  0.000  1.0
  Si  Si16  1  0.494  0.800  0.183  1.0
  Si  Si17  1  0.750  0.974  0.799  1.0
  Si  Si18  1  0.506  0.200  0.817  1.0
  Si  Si19  1  0.750  0.335  0.500  1.0
  Si  Si20  1  0.250  0.026  0.201  1.0
  Si  Si21  1  0.006  0.800  0.183  1.0
  Si  Si22  1  0.494  0.300  0.317  1.0
  Si  Si23  1  0.506  0.700  0.683  1.0
  C  C24  1  0.250  0.196  0.529  1.0
  C  C25  1  0.750  0.304  0.029  1.0
  C  C26  1  0.250  0.696  0.971  1.0
  C  C27  1  0.750  0.804  0.471  1.0
  N  N28  1  0.750  0.214  0.285  1.0
  N  N29  1  0.501  0.063  0.770  1.0
  N  N30  1  0.999  0.563  0.730  1.0
  N  N31  1  0.499  0.437  0.270  1.0
  N  N32  1  0.750  0.714  0.215  1.0
  N  N33  1  0.981  0.244  0.041  1.0
  N  N34  1  0.499  0.937  0.230  1.0
  N  N35  1  0.999  0.063  0.770  1.0
  N  N36  1  0.001  0.437  0.270  1.0
  N  N37  1  0.519  0.744  0.459  1.0
  N  N38  1  0.019  0.256  0.541  1.0
  N  N39  1  0.519  0.244  0.041  1.0
  N  N40  1  0.250  0.786  0.715  1.0
  N  N41  1  0.250  0.286  0.785  1.0
  N  N42  1  0.250  0.083  0.519  1.0
  N  N43  1  0.019  0.756  0.959  1.0
  N  N44  1  0.981  0.744  0.459  1.0
  N  N45  1  0.750  0.917  0.481  1.0
  N  N46  1  0.501  0.563  0.730  1.0
  N  N47  1  0.481  0.256  0.541  1.0
  N  N48  1  0.481  0.756  0.959  1.0
  N  N49  1  0.250  0.583  0.981  1.0
  N  N50  1  0.750  0.417  0.019  1.0
  N  N51  1  0.001  0.937  0.230  1.0
[/CIF]
.