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KCN crystallizes in the monoclinic Cm space group. The structure is three-dimensional. K1+ is bonded to four equivalent N3- atoms to form distorted corner-sharing KN4 trigonal pyramids. There are a spread of K–N bond distances ranging from 2.86–3.27 Å. C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.18 Å. N3- is bonded in a distorted single-bond geometry to four equivalent K1+ and one C2+ atom.
KCN crystallizes in the monoclinic C2 space group. The structure is three-dimensional. K1+ is bonded to four equivalent N3- atoms to form distorted corner-sharing KN4 trigonal pyramids. There are two shorter (2.95 Å) and two longer (2.97 Å) K–N bond lengths. C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.18 Å. N3- is bonded in a 1-coordinate geometry to four equivalent K1+ and one C2+ atom.
KCN crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of K–N bond distances ranging from 2.85–3.02 Å. In the second K1+ site, K1+ is bonded in a distorted single-bond geometry to one N3- atom. The K–N bond length is 2.81 Å. In the third K1+ site, K1+ is bonded in a 1-coordinate geometry to six N3- atoms. There are a spread of K–N bond distances ranging from 2.82–3.30 Å. In the fourth K1+ site, K1+ is bonded in a 2-coordinate geometry to two N3- atoms. There are one shorter (2.81 Å) and one longer (2.96 Å) K–N bond lengths. There are four inequivalent C2+ sites. In the first C2+ site, C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.36 Å. In the second C2+ site, C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.41 Å. In the third C2+ site, C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.42 Å. In the fourth C2+ site, C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.37 Å. There are four inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted single-bond geometry to three K1+ and one C2+ atom. In the second N3- site, N3- is bonded in a 1-coordinate geometry to four K1+ and one C2+ atom. In the third N3- site, N3- is bonded in a 1-coordinate geometry to four K1+ and one C2+ atom. In the fourth N3- site, N3- is bonded in a distorted single-bond geometry to three K1+ and one C2+ atom.
KCN crystallizes in the monoclinic Cc space group. The structure is three-dimensional. K1+ is bonded in a distorted rectangular see-saw-like geometry to four equivalent N3- atoms. There are a spread of K–N bond distances ranging from 2.90–3.18 Å. C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.18 Å. N3- is bonded in a distorted single-bond geometry to four equivalent K1+ and one C2+ atom.
Cu(In,Ga)Se 2 thin films deposited by a single-stage co-evaporation process at 350 ºC on molybdenum coated soda lime glass substrate were annealed post-deposition in InCl 3 vapor. The amount of InCl 3 and Se was varied. Here, the annealing treatment was done at 450 ºC for 30 minutes. Increase in grain size was observed after the treatment in all cases by X-ray diffraction. Device performance was low, but improved slightly after KCN etching.