Narrow-Band Emitting Phosphor NaCsSr(BO):Eu Discovered from Local Structure Similarity with Sulfate Phosphor.

Narrow-band emitting phosphors are required to improve the performance of phosphor-converted light-emitting diodes. Here, we found a new narrow-band emitting phosphor NaCsSr(BO):Eu using the local structure similarity with a known narrow-band emitting phosphor. In a 2D scatter plot of the structural similarity between the local structures, the Sr site in NaCsSr(BO) was located near the Ba site of the known narrow-band emitting sulfate phosphor BaSO:Eu with a distorted local structure.

Characterization of the charge transfer luminescence of the [WO] octahedron in CaWO and the [WO] square pyramid in CaWOCl.

Charge transfer (CT) luminescence of different types of polyhedra, [WO] in CaWOCl and [WO] in CaWO, is characterized by spectroscopic experiments and calculations. According to the geometry optimization, W ions form five-fold [WO] square pyramids in CaWOCl because of a large interatomic distance between W and Cl of 3.266 Å.

Dissimilarity measure of local structure in inorganic crystals using Wasserstein distance to search for novel phosphors.

To efficiently search for novel phosphors, we propose a dissimilarity measure of local structure using the Wasserstein distance. This simple and versatile method provides the quantitative dissimilarity of a local structure around a center ion. To calculate the Wasserstein distance, the local structures in crystals are numerically represented as a bag of interatomic distances.

Lens regenerates by means of similar processes and timeline in adults and larvae of the newt Cynops pyrrhogaster.

Background: It is widely accepted that juvenile animals can regenerate faster than adults. For example, in the case of lens regeneration of the newt Cynops pyrrhogaster, larvae and adults require approximately 30 and 80 days for completion of lens regeneration, respectively. However, when we carefully observed lens regeneration in C.