Crystal and molecular structures of [1-(2-aminoethyl)-1,2-dihydroimidazolidene-2] nitroaceto-nitrile (C7H11N5O2) and 3,7-diamino-4-nitro-6-hydroxy-8-oxopyrazolo[1,5-a] pyrimidine monohydrate (C6H6N6O4+H2O) from x-Ray, synchrotron and neutron powder diffra