2001/04/01 by Uwe Hoppe, Heike Ebendorff‐Heidepriem, Heike Ebendorff-Heidepriem +2
Materials Science · #Glass properties and applications #Luminescence Properties of Advanced Materials #Phase-change materials and chalcogenides
paper · pdf · doi:10.1515/zna-2001-0301
openalex publication_date 2001/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract Diffraction experiments were performed on two (Nd 2 O 3 ) x (P 2 O 5 ) 1- x glasses for studying the en vironmental order of the Nd 3+ cations. In case of the metaphosphate glass (x = 0.25) a combination of X-ray and neutron diffraction data was used to separate the Nd-O and O-O first neighbor peaks. An Nd-O coordination number of 6.6±0.3 and a mean Nd-O distance of (0.239±0.001) nm were determined. In the ultraphosphate glass studied (x = 0.20) these values increase to 6.9±0.3 and (0.240±0.001) nm where the Nd-0 coordination number is equal to the number of terminal oxygen atoms (O T ) which are available for coordination of each Nd 3+ cation. This indicates the formation of NdO n polyhedra not sharing any O atom where also all O T 's are in N d-O T -P positions. In the metaphosphate glass the NdO n polyhedra have to share some O T sites.