Please Mind the Gap: Highly Condensed P-N Networks in LiP N and Li P N (NH).

Chemistry

Department of Chemistry, University of Munich (LMU), Butenandtstraße 5-13 (D), 81377, Munich, Germany.

Published: January 2024

Alkali nitridophosphates AP N and A P N (A=Na, K, Rb, Cs) have been known for decades. However, their Li homologues have remained elusive. In this work, the highly condensed lithium (imido)nitridophosphates LiP N and Li P N (NH) (x=1.66(3)) were synthesized from LiPN and P N in the multianvil press at 10 GPa. They constitute the first lithium nitridophosphates with 3D networks exhibiting a degree of condensation larger than 0.5 and high thermal stability. LiP N crystallizes in the orthorhombic space group P2 2 2 with a=4.5846(6) Å, b=8.0094(11) Å, and c=13.252(2) Å (Z=4). Li P N (NH) crystallizes in the triclinic space group P with Z=2, a=4.6911(11) Å, b=7.024(2) Å, c=12.736(3) Å, α=87.726(11), β=80.279(11), and γ=70.551(12)°. Both compounds are stable against hydrolysis in air.

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http://dx.doi.org/10.1002/chem.202303251DOI Listing

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