The crystal structure described by RbCaAs is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. Rb(1) is bonded in a 1-coordinate geometry to five equivalent As(1) atoms. Ca(1) is bonded to four equivalent As(1) atoms to form a mixture of distorted corner and edge-sharing CaAs4 tetrahedra. As(1) is bonded in a 9-coordinate geometry to five equivalent Rb(1) and four equivalent Ca(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbCaAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.156
_cell_length_b   5.156
_cell_length_c   7.931
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   210.876
_cell_formula_units_Z   2
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
  Rb  Rb0  1  0.750  0.750  0.373  1.0
  Rb  Rb1  1  0.250  0.250  0.627  1.0
  Ca  Ca2  1  0.250  0.750  0.000  1.0
  Ca  Ca3  1  0.750  0.250  0.000  1.0
  As  As4  1  0.250  0.250  0.185  1.0
  As  As5  1  0.750  0.750  0.815  1.0
[/CIF]
.
The crystal structure described by RbCaAs is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. Rb(1) is bonded in a 1-coordinate geometry to five equivalent As(1) atoms. Ca(1) is bonded to four equivalent As(1) atoms to form a mixture of distorted corner and edge-sharing CaAs4 tetrahedra. As(1) is bonded in a 9-coordinate geometry to five equivalent Rb(1) and four equivalent Ca(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbCaAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.156
_cell_length_b   5.156
_cell_length_c   7.931
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   210.876
_cell_formula_units_Z   2
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
  Rb  Rb0  1  0.750  0.750  0.373  1.0
  Rb  Rb1  1  0.250  0.250  0.627  1.0
  Ca  Ca2  1  0.250  0.750  0.000  1.0
  Ca  Ca3  1  0.750  0.250  0.000  1.0
  As  As4  1  0.250  0.250  0.185  1.0
  As  As5  1  0.750  0.750  0.815  1.0
[/CIF]
.