Ja. Hanko et al., (PH4P)(4)[PD7AS10S22] - A SULFOSALT WITH A LARGE CLUSTER ANION WHOSE STRUCTURE RESEMBLES A GONDOLA, Inorganic chemistry, 37(8), 1998, pp. 1670
The [Pd(7)AS(10)S(22)](4-) molecule assembles under hydrothermal condi
tions from Pd2+ and [AsS3](3-) to adopt the unusual shape of a gondola
. Key to its formation appears to be the creation of direct Pd-As bond
s.