Lattice Parameters of Aluminium Nitride in the Range 10-291 K

W arsaw, Po l and b Darm sta dt Uni versi ty of T echnol ogy, Insti tute of Ma teri al s Science Petersenstr.23, 6 4287 Darm stadt, G ermany c Facul ty of Chem i stry , W arsaw Uni versi ty of T echnology Noakowski ego 3, 00-66 4 W arsaw, Po land L att i ce pa ra meter s for alumi ni um nitri de w ere determined usin g X -ra y p owder di ˜ractio n at a sync hrotron radiation source ( beamlin e B 2, H asylab / D ESY , Hamburg ) in the temp erature range from 10 K to 291 K .T he measurements w ere carried out using the Debye {Scherrer geometry .T he relati ve change of b oth, a and c , on rising the temp erature in the studied range (10{291 K ) is ab out 0.03%.T he results are compared with earlier lab oratory data and theoretical prediction s.