Table 1. Lattice Parameters, Coordinates, and Displacement Parameters of Atoms in the Rhombohedral and Monoclinic Structures of Selected (Al_1–xGa_x)₂O₃:Mn,Mg (x = 0.05, 0.10, 0.25, and 0.75) Samples.

lattice param	atoms, sites	x/a	y/b	z/c	Biso/eq, Å2	occupancy
(Al0.95Ga0.05)2O3:Mn,Mg (R3c); RI = 0.026, RP = 0.049
a = 4.76550(6) Å	Al, 12c	0	0	0.35218(8)	1.79(3)	0.953(4) Al3+ + 0.047(4) Ga3+
c = 13.0062(2) Å	O, 18e	0.3049(4)	0	1/4	1.79(5)	O2–
(Al0.90Ga0.10)2O3:Mn,Mg (R3c,72.8 wt.%); RI = 0.034, RP = 0.111
a = 4.78804(9) Å	Al, 12c	0	0	0.35296(7)	1.36(3)	0.895(2) Al3+0.105(2) Ga3+
c = 13.0511(3) Å	O, 18e	0.3073(4)	0	1/4	2.02(5)	O2–
(Al0.90Ga0.10)2O3:Mn,Mg (C2/m, 27.2 wt %); RI = 0.063, RP = 0.111
a = 11.8816(3) Å	Al1, 4i	0.0912(4)	0	0.8015(10)	0.59(9)	0.890(7) Al3+ + 0.110(7) Ga3+
b = 2.94055(9) Å	Al2, 4i	0.3412(3)	0	0.6826(9)	1.51(13)	0.897(8) Al3+ + 0.103(8) Ga3+
c = 5.6685(2) Å	O1, 4i	0.1604(7)	0	0.102(2)	2.4(2)	O2–
β = 104.080(2)°	O2, 4i	0.4913(6)	0	0.2517(14)	3.2(3)	O2–
	O3, 4i	0.8256(6)	0	0.414(2)	2.7(2)	O2–
(Al0.75Ga0.25)2O3:Mn,Mg (C2/m); RI = 0.029, RP = 0.078
a = 11.9040(2) Å	Al1, 4i	0.0911(2)	0	0.7957(3)	1.45(3)	0.641(9) Al3+ + 0.359(9) Ga3+
b = 2.94661(4) Å	Al2, 4i	0.3423(1)	0	0.6838(3)	1.24(4)	0.842(8) Al3+ + 0.158(8) Ga3+
c = 5.67849(6) Å	O1, 4i	0.1593(3)	0	0.1106(7)	2.23(9)	O2–
β = 104.080(1)°	O2, 4i	0.4952(3)	0	0.2568(5)	2.39(10)	O2–
	O3, 4i	0.8280(3)	0	0.4351(7)	1.86(8)	O2–
(Al0.25Ga0.75)2O3:Mn,Mg (C2/m); RI = 0.016, RP = 0.056
a = 12.11953(6) Å	Al1, 4i	0.09053(5)	0	0.7947(1)	0.72(1)	0.18(1) Al3+ + 0.82(1) Ga3+
b = 3.01145(2) Å	Al2, 4i	0.34162(5)	0	0.6862(1)	0.70(2)	0.32(1) Al3+ + 0.68(1) Ga3+
c = 5.77046(3) Å	O1, 4i	0.1632(2)	0	0.1064(5)	1.20(5)	O2–
β = 103.963(1)°	O2, 4i	0.4962(2)	0	0.2560(4)	1.23(6)	O2–
	O3, 4i	0.8284(2)	0	0.4353(4)	0.95(5)	O2–