Gold-gold bonding: the key to stabilizing the 19-electron ternary phases LnAuSb (Ln = La-Nd and Sm).

We report a new family of ternary 111 hexagonal LnAuSb (Ln = La-Nd, Sm) compounds that, with a 19 valence electron count, has one extra electron compared to all other known LnAuZ compounds. LaAuSb, CeAuSb, PrAuSb, NdAuSb, and SmAuSb crystallize in the YPtAs-type structure, and have a doubled unit cell compared to other LnAuZ phases as a result of the buckling of the Au-Sb honeycomb layers to create interlayer Au-Au dimers. The dimers accommodate the one excess electron per Au and thus these new phases can be considered Ln2(3+)(Au-Au)(0)Sb2(3-).

The management of an ectopic ovary in the inguinal canal: literature review and discussion.

We report the case of a female adolescent who had an ectopic ovary in the inguinal canal without an associated hernia, a unicornuate uterus, and ipsilateral renal agenesis. The incidental discovery of the ectopic ovary and other Mullerian anomalies, as well as the surgical correction that followed, highlights important fertility considerations in children and available treatment algorithms for these rare cases.