# Nitride iodide

An iodide nitride is a mixed anion compound containing both iodide (I$^−$) and nitride ions (N$^{3−}$). Another name is metalloiodonitrides. They are a subclass of halide nitrides or pnictide halides. Some different kinds include ionic alkali or alkaline earth salts, small clusters where metal atoms surround a nitrogen atom, layered group 4 element 2-dimensional structures (which could be exfoliated to a monolayer), and transition metal nitrido complexes counter-balanced with iodide ions. There is also a family with rare earth elements and nitrogen and sulfur in a cluster.
Related mixed-anion compounds include halogen variations: nitride fluoride, nitride chloride, and nitride bromide, and pnictogen variations phosphide iodide, arsenide iodide and antimonide iodides.

## Production

Nitride iodides may be produced by heating metal nitrides with metal iodides. The ammonolysis process heats a metal iodide with ammonia. A related method heats a metal or metal hydride with ammonium iodide. The nitrogen source could also be an azide or an amide.

## List

| name | formula | formula weight | crystal system | space group | unit cell Å | volume | density | comments |
| | Li$_4$NCl | | hexagonal | R3 | a=366.225 c=1977.18 Z=3 | | | |
| calcium nitride iodide | Ca$_2$NI | | | P6$_3$/mmc | a = 3.8095, c = 14.530, Z = 2 | | | |
| | α-TiNI | | orthorhombic | Pmmn | a=3.941 b=3.51.5 c=8.955 Z=2 | | | black |
| | NCr(I)(N$^i$Pr$_2$)$_2$ | | | | | | | |
| | Cr(I)(N)(N(C(CD$_3$)$_2$CH$_{3)}$(C$_6$H$_3$FMe))2 | | | | | | | |
| | Zn$_2$NI | | orthorhombic | Pnma | a=6.3590 b=6.2529 c=7.9549 | | | <6 GPa |
| strontium nitride iodide | Sr$_2$NI | 316.15 | trigonal | R3m | a = 4.0049 c = 23.055 Z=3 | 320.24 | 4.918 | orange |
| | α-ZrNI | | orthorhombic | Pmmn | a=4.114 b=3.724 c=9.431 Z=2 | | | orange |
| | β-ZrNI | | trigonal | R3m | a=3.718 c=31.381 Z=6 | | | brown |
| | [(pcp)Mo$^{(IV)}$(N)(I)][Na(15-crown-5)] pcp=C$_6$H$_3$(OPiPr$_2$)$_2$ | | | | | | | |
| | Ba$_2$NI | | | | | | | |
| | LiLa$_4$N$_2$I$_7$ | | orthorhombic | Pnma | a = 13.7417, b = 12.1345, c = 10.7991 Z=4 | | | @100K |
| | NaLa$_4$N$_2$I$_7$ | | orthorhombic | Pna2$_1$ | a=14.0018 b=10.9315 c=12.1021 Z=4 | | 5.361 | colourless air sensitive |
| | Ce$_{15}$N$_7$I$_{24}$ | 4245.6 | orthorhombic | Pnma | a=12.060 b=32.216 c=16.360 Z=4 | | 5.48 | red; air sensitive |
| | NaCe$_4$N$_2$I$_7$ | | orthorhombic | Pna2$_1$ | a=13.9703 b=10.8932 c=12.0194 Z=4 | | 5.446 | red air sensitive |
| | NaPr$_4$N$_2$I$_7$ | | orthorhombic | Pna2$_1$ | a=13.9412 b=10.8578 c=11.9389 Z=4 | | 5.524 | yellowish green air sensitive |
| | NaNd$_4$N$_2$I$_7$ | | orthorhombic | Pna2$_1$ | a=13.9135 b=10.86 c=11.86 Z=4 | | 5.638 | pinkish blue air sensitive |
| | (NdI$_2$)$_3$N | | | | | | | |
| | (NdI$_2$)$_3$N(DME)$_4$ | | | | | | | |
| | NdI(S$_2$N$_2$)(THF) | | | | | | | |
| | Nd$_3$I$_5$(S$_2$N$_2$)(S$_2$)(THF)$_{10}$ | 2088.72 | monoclinic | P2$_1$ | a=12.393 b=43.389 c=12.684 β=90.013 Z=4 | 6820 | 2.034 | yellow |
| | Ln$_3$I$_5$(S$_2$)(S$_2$N$_2$)(THF)$_4$(Phen)$_3$ | | | | | | | |
| | Ln$_3$I$_5$(S$_2$)(S$_2$N$_2$)(THF)3(Py)$_7$ | | | | | | | |
| | (SmI)$_3$N$_2$(THF) | | | | | | | |
| | ErI(S$_2$N$_2$)(THF) | | | | | | | |
| | Nd$_2$ErClI$_4$-(S$_2$)(S$_2$N$_2$)(THF)$_7$ | | | | | | | |
| | Nd$_2$ErCl$_2$I$_3$(S$_2$)(S$_2$N$_2$)(THF)$_7$ | | | | | | | |
| | (DyI$_2$)$_3$N | | | | | | | |
| | Dy$_3$I$_5$(S$_2$)(S$_2$N$_2$)(THF)$_{10}$ | | | | | | | |
| | Nd$_2$DyI$_5$(S$_2$)(S$_2$N$_2$)(THF)$_7$ | | | | | | | |
| | Nd$_2$DyI$_5$(S$_3$)(S$_2$N$_2$)(THF)$_9$ | 2034.88 | monoclinic | P2$_1$/c | a=23.1102 b=12.6551 c=23.8268 β =111.201 Z=4 | 6496.8 | 2.080 | |
| | Nd$_2$TbI$_5$(S$_2$)(S$_2$N$_2$)(THF)$_9$ | | monoclinic | P2$_1$/c | a =23.1704 b =12.6340 c =23.8340, β =111.274° Z=4 | | | |
| | Nd$_2$TmI$_5$(S$_2$)(S$_2$N$_2$)(THF)$_9$ | | monoclinic | P2$_1$/c | a =23.075 b =12.6540 c =23.809, β =111.460° Z=4 | | | |
| | Nd$_2$YbI$_5$(S$_3$)(S$_2$N$_2$)(THF)$_9$ | | monoclinic | P2$_1$/c | a=23.0959 b=12.6632 c=23.8387 β =111.363 Z=4 | 6493.0 | 2.092 | |
| | α-HfNI | | orthorhombic | Pmmn | a=4.10.67 b=3.6944 c=9.382 Z=2 | | | |
| | β-HfNI | | trigonal | R3m | a=3.689 c=31.329 Z=6 | | | brown |
| | ThNI | | tetragonal | P4/nmm | a=4.107 c=9.242 | | | orange to golden grey |
| | UNI | | tetragonal | P4/nmm | a=3.99 c=9.20 Z=2 | | | |