Strukturuntersuchung an Bariumazid Ba(N₃)₂

Three Solid Modifications of Ba[Ga(NH2)4]2: A Soluble Intermediate in Ammonothermal GaN Crystal Growth

“…Each Ba atom is coordinated by nine amide groups. This coordination number is larger than that known from Ba(NH 2 ) 2 but similar to that, for example, in Ba(N 3 ) 2 , . Accordingly, the average Ba–N distance within these ninefold coordinated polyhedra is slightly longer than that for the eightfold coordination in both other modifications of Ba[Ga(NH 2 ) 4 ] 2 (302 compared to 296 pm; compare Table ).…”

The First Alkaline‐Earth Azidoaurate(III), Ba[Au(N3)4]2 ⋅ 4 H2O

“…In these phases, the coordination numbers of cations by azide range from six (LiN 3 ) [6] to eight (KN 3 , [10] Sr(N 3 ) 2 ) [11,12] and nine (Ba(N 3 ) 2 ). [11,13,14] Binary gold azides are hitherto unknown. First reports dating to 1898 [15] were shown to be in reality ternary sodium azidoaurate(III) in 1957.…”

“…The binary azides of alkali metals such as LiN 3 , NaN 3 , KN 3 , RbN 3 and CsN 3 , [5–6] like the heavy alkaline‐earth metal azides A e (N 3 ) 2 ( A e =Ca, Sr, Ba), [7–9] contain linear and (nearly) symmetrical azide species. In these phases, the coordination numbers of cations by azide range from six (LiN 3 ) [6] to eight (KN 3 , [10] Sr(N 3 ) 2 ) [11,12] and nine (Ba(N 3 ) 2 ) [11,13,14] …”