Zintlphasen mit komplexen Anionen: Ca5Al2Sb6 (I) und Ca3Al2As4 (II) werden durch Erhitzen stöchiometrischer Elementgemenge unter Ar (Korundtiegel) auf 1200 K(0.5 h) dargestellt und röntgenographisch untersucht.
At 30 kbar and 1000 °C in the Ba/Al-system the compound BaAl2 exists, which remains metastable under standard temperature and pressure after quenching. The new compound crystallizes in the MgCu2-type with a = 870.2(5) pm.
SrAl2, forming at standard conditions the KHg2 structure type, transforms at ~60 kbar and 1050 °C to a high pressure modification with the MgCu2 structure (a = 832.5(5) pm).
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