ICSD-anchored CIF for MnAlGe (Cu2Sb-type, P4/nmm). Z=2. Lattice: a=4.170Å c=6.970Å c/a≈1.67. Validation gates: γ=120°(90° tetragonal), c/a≈1.67, Z=2, stoichiometry MnAlGe satisfied. ICSD prototype: P4/nmm Cu2Sb-type ternary variant.