Tsveta Stanimirova: Professor at Sofia University "St. Kliment Ohridski", Bulgaria. Expertise in: crystal–chemical characterization; the modification and application of various minerals, including secondary hydroxide minerals, ore minerals, and zeolites. Teaching in: mineralogy, experimental and technical mineralogy, genetic mineralogy, crystallography, crystal chemistry, and the methods of X-ray diffraction. Publications: a total of 70 publications in WOS-indexed journals, with 690 citations and an h-index of 12. Team member in five national projects, two international projects, and a project manager of one national project.