The material described by Ca2MnAl2BSi4O15 crystallizes in the triclinic P-1 space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(12), one O(14), one O(2), one O(4), one O(5), and one O(9) atom. In the second Ca site, Ca(2) is bonded to one O(11), one O(13), one O(15), and two equivalent O(8) atoms to form distorted CaO5 square pyramids that share corners with two equivalent Si(3)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra, edges with two equivalent Al(1)O6 octahedra, and  an edgeedge with one Ca(2)O5 square pyramid. Mn(1) is bonded in a 5-coordinate geometry to one O(1), one O(13), one O(5), one O(7), and one O(9) atom. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(13), one O(14), one O(15), one O(4), and one O(8) atom to form AlO6 octahedra that share  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra, and edges with two equivalent Ca(2)O5 square pyramids. In the second Al site, Al(2) is bonded to one O(11), one O(12), one O(14), one O(15), and two equivalent O(6) atoms to form AlO6 octahedra that share  a cornercorner with one B(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, and  an edgeedge with one Ca(2)O5 square pyramid. B(1) is bonded to one O(14), one O(2), one O(5), and one O(7) atom to form BO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-55°. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, and  a cornercorner with one B(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-53°. In the third Si site, Si(3) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra, corners with two equivalent Ca(2)O5 square pyramids,  a cornercorner with one B(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(12), and one O(13) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, corners with two equivalent Ca(2)O5 square pyramids, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-57°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(1), one Al(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one B(1), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Al(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ca(1), one Mn(1), one B(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one B(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Ca(2), one Al(1), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(1), and one Si(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Si(3) and one Si(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Ca(2), one Al(2), and one Si(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Ca(1), one Al(2), and one Si(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Ca(2), one Mn(1), one Al(1), and one Si(4) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Ca(1), one Al(1), one Al(2), and one B(1) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one Ca(2), one Al(1), and one Al(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2MnAl2Si4BO15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.324
_cell_length_b   8.866
_cell_length_c   9.327
_cell_angle_alpha   88.006
_cell_angle_beta   76.438
_cell_angle_gamma   81.484
_symmetry_Int_Tables_number   1
_cell_volume   582.246
_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
  Ca  Ca0  1  0.246  0.392  0.670  1.0
  Ca  Ca1  1  0.754  0.608  0.330  1.0
  Ca  Ca2  1  0.834  0.105  0.910  1.0
  Ca  Ca3  1  0.166  0.895  0.090  1.0
  Mn  Mn4  1  0.233  0.118  0.402  1.0
  Mn  Mn5  1  0.767  0.882  0.598  1.0
  Al  Al6  1  0.950  0.259  0.180  1.0
  Al  Al7  1  0.050  0.741  0.820  1.0
  Al  Al8  1  0.657  0.417  0.061  1.0
  Al  Al9  1  0.343  0.583  0.939  1.0
  Si  Si10  1  0.784  0.223  0.547  1.0
  Si  Si11  1  0.216  0.777  0.453  1.0
  Si  Si12  1  0.778  0.518  0.726  1.0
  Si  Si13  1  0.222  0.482  0.274  1.0
  Si  Si14  1  0.303  0.013  0.741  1.0
  Si  Si15  1  0.697  0.987  0.259  1.0
  Si  Si16  1  0.359  0.229  0.980  1.0
  Si  Si17  1  0.641  0.771  0.020  1.0
  B  B18  1  0.536  0.290  0.368  1.0
  B  B19  1  0.464  0.710  0.632  1.0
  O  O20  1  0.947  0.171  0.399  1.0
  O  O21  1  0.053  0.829  0.601  1.0
  O  O22  1  0.578  0.304  0.519  1.0
  O  O23  1  0.422  0.696  0.481  1.0
  O  O24  1  0.853  0.346  0.646  1.0
  O  O25  1  0.147  0.654  0.354  1.0
  O  O26  1  0.975  0.572  0.738  1.0
  O  O27  1  0.025  0.428  0.262  1.0
  O  O28  1  0.672  0.636  0.613  1.0
  O  O29  1  0.328  0.364  0.387  1.0
  O  O30  1  0.618  0.498  0.874  1.0
  O  O31  1  0.382  0.502  0.126  1.0
  O  O32  1  0.471  0.876  0.657  1.0
  O  O33  1  0.529  0.124  0.343  1.0
  O  O34  1  0.125  0.941  0.844  1.0
  O  O35  1  0.875  0.059  0.156  1.0
  O  O36  1  0.230  0.136  0.625  1.0
  O  O37  1  0.770  0.864  0.375  1.0
  O  O38  1  0.408  0.096  0.848  1.0
  O  O39  1  0.592  0.904  0.152  1.0
  O  O40  1  0.559  0.236  0.024  1.0
  O  O41  1  0.441  0.764  0.976  1.0
  O  O42  1  0.291  0.387  0.900  1.0
  O  O43  1  0.709  0.613  0.100  1.0
  O  O44  1  0.205  0.166  0.122  1.0
  O  O45  1  0.795  0.834  0.878  1.0
  O  O46  1  0.673  0.357  0.261  1.0
  O  O47  1  0.327  0.643  0.739  1.0
  O  O48  1  0.897  0.316  0.005  1.0
  O  O49  1  0.103  0.684  0.995  1.0
[/CIF]
.
The material described by Ca2MnAl2BSi4O15 crystallizes in the triclinic P-1 space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(12), one O(14), one O(2), one O(4), one O(5), and one O(9) atom. In the second Ca site, Ca(2) is bonded to one O(11), one O(13), one O(15), and two equivalent O(8) atoms to form distorted CaO5 square pyramids that share corners with two equivalent Si(3)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra, edges with two equivalent Al(1)O6 octahedra, and  an edgeedge with one Ca(2)O5 square pyramid. Mn(1) is bonded in a 5-coordinate geometry to one O(1), one O(13), one O(5), one O(7), and one O(9) atom. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(13), one O(14), one O(15), one O(4), and one O(8) atom to form AlO6 octahedra that share  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra, and edges with two equivalent Ca(2)O5 square pyramids. In the second Al site, Al(2) is bonded to one O(11), one O(12), one O(14), one O(15), and two equivalent O(6) atoms to form AlO6 octahedra that share  a cornercorner with one B(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, and  an edgeedge with one Ca(2)O5 square pyramid. B(1) is bonded to one O(14), one O(2), one O(5), and one O(7) atom to form BO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-55°. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, and  a cornercorner with one B(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-53°. In the third Si site, Si(3) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra, corners with two equivalent Ca(2)O5 square pyramids,  a cornercorner with one B(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(12), and one O(13) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, corners with two equivalent Ca(2)O5 square pyramids, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-57°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(1), one Al(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one B(1), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Al(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ca(1), one Mn(1), one B(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one B(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Ca(2), one Al(1), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(1), and one Si(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Si(3) and one Si(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Ca(2), one Al(2), and one Si(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Ca(1), one Al(2), and one Si(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Ca(2), one Mn(1), one Al(1), and one Si(4) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Ca(1), one Al(1), one Al(2), and one B(1) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one Ca(2), one Al(1), and one Al(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2MnAl2Si4BO15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.324
_cell_length_b   8.866
_cell_length_c   9.327
_cell_angle_alpha   88.006
_cell_angle_beta   76.438
_cell_angle_gamma   81.484
_symmetry_Int_Tables_number   1
_cell_volume   582.246
_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
  Ca  Ca0  1  0.246  0.392  0.670  1.0
  Ca  Ca1  1  0.754  0.608  0.330  1.0
  Ca  Ca2  1  0.834  0.105  0.910  1.0
  Ca  Ca3  1  0.166  0.895  0.090  1.0
  Mn  Mn4  1  0.233  0.118  0.402  1.0
  Mn  Mn5  1  0.767  0.882  0.598  1.0
  Al  Al6  1  0.950  0.259  0.180  1.0
  Al  Al7  1  0.050  0.741  0.820  1.0
  Al  Al8  1  0.657  0.417  0.061  1.0
  Al  Al9  1  0.343  0.583  0.939  1.0
  Si  Si10  1  0.784  0.223  0.547  1.0
  Si  Si11  1  0.216  0.777  0.453  1.0
  Si  Si12  1  0.778  0.518  0.726  1.0
  Si  Si13  1  0.222  0.482  0.274  1.0
  Si  Si14  1  0.303  0.013  0.741  1.0
  Si  Si15  1  0.697  0.987  0.259  1.0
  Si  Si16  1  0.359  0.229  0.980  1.0
  Si  Si17  1  0.641  0.771  0.020  1.0
  B  B18  1  0.536  0.290  0.368  1.0
  B  B19  1  0.464  0.710  0.632  1.0
  O  O20  1  0.947  0.171  0.399  1.0
  O  O21  1  0.053  0.829  0.601  1.0
  O  O22  1  0.578  0.304  0.519  1.0
  O  O23  1  0.422  0.696  0.481  1.0
  O  O24  1  0.853  0.346  0.646  1.0
  O  O25  1  0.147  0.654  0.354  1.0
  O  O26  1  0.975  0.572  0.738  1.0
  O  O27  1  0.025  0.428  0.262  1.0
  O  O28  1  0.672  0.636  0.613  1.0
  O  O29  1  0.328  0.364  0.387  1.0
  O  O30  1  0.618  0.498  0.874  1.0
  O  O31  1  0.382  0.502  0.126  1.0
  O  O32  1  0.471  0.876  0.657  1.0
  O  O33  1  0.529  0.124  0.343  1.0
  O  O34  1  0.125  0.941  0.844  1.0
  O  O35  1  0.875  0.059  0.156  1.0
  O  O36  1  0.230  0.136  0.625  1.0
  O  O37  1  0.770  0.864  0.375  1.0
  O  O38  1  0.408  0.096  0.848  1.0
  O  O39  1  0.592  0.904  0.152  1.0
  O  O40  1  0.559  0.236  0.024  1.0
  O  O41  1  0.441  0.764  0.976  1.0
  O  O42  1  0.291  0.387  0.900  1.0
  O  O43  1  0.709  0.613  0.100  1.0
  O  O44  1  0.205  0.166  0.122  1.0
  O  O45  1  0.795  0.834  0.878  1.0
  O  O46  1  0.673  0.357  0.261  1.0
  O  O47  1  0.327  0.643  0.739  1.0
  O  O48  1  0.897  0.316  0.005  1.0
  O  O49  1  0.103  0.684  0.995  1.0
[/CIF]
.