What are the coordination numbers of Mn, La and O respectively? — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Sol. In the nearest neighbour of Mn2+(0), there are six oxides (x) at the adjacent six edge centre, hence CN of Mn2+ = 6. The nearest neighbour points to the body centre is the 12 edge centres where oxide ions (x) are present, hence CN of Ln4+ = 12. In the nearest neighbour of O2-(x) there are only two Mn2+ on the adjacent corners, hence CN of x = 2.