Nowadays, the organic and organic-inorganic supramolecular crystals are potential candidates for lighting applications. In this work, a new molecular crystal (C5H8N3)2[MnCl4(C5H7N3)2] abbreviated (AmpH)2[MnCl4(Amp)2], (C5H7N3 = Amp = 2-amino-4-methylpyrimidine), containing octahedral...