Education Information Network (EIN), which is an online social education platform, is one of the components of the FATIH Project. EIN contains the preparation and management of e-content, and e-content of EIN consists of different learning/teaching materials such as lessons, e-books, videos, simulations/animations, questions, experiments. In this study, it was aimed to examine experienced chemistry teachers' usage of EIN chemistry course e-contents in their courses. The sample consisted of 40 (26 female and 14 male) experienced chemistry teachers working in different provinces and different types of secondary schools in Turkey. The data collected with an instrument which contains ten open-ended questions developed by the authors and analyzed through content analysis. In the study, it was found that vocational high school teachers were the teachers who benefited the most from the e-contents of the EBA. It was concluded that vocational high school teachers preferred to use simulation, animation and chemistry experiments, and science high school teachers mostly used test questions. At the end of the study, recommendations were made for the use of EIN e-contents more effectively by the chemistry teachers.

A new binary metal borate compound, trilithiumdiyttriumorthoborate, Li 3 Y 2 (BO 3) 3 was successfully synthesized by a solid-state reaction at 1000 °C using the initial reactants of Li 2 CO 3 , Y 2 O 3 , and H 3 BO 3 (molar ratio in the order; 1.5:1:3). The phase, crystallinity and size distribution of Li 3 Y 2 (BO 3) 3 was investigated by X-Ray Powder Diffraction (XRD) and Scanning Electron Microscopy (SEM). It was found that single phase Li 3 Y 2 (BO 3) 3 crystallizes in orthorhombic crystal with refined unit cell parameters of a=8.9228, b=9.5840, c=20.4469Å, Z=9 and represent the space group of Pmmm. Average particle size was calculated as 70 nm by Scherrer's equation. The luminescence properties of Li 3 Y 2 (BO 3) 3 were investigated by using steady state photoluminescence (PL) measurement as a function of temperature between 10 to 300 K. It was observed that the spectra are dominated with the transitions in the visible part of spectrum related to defects present in compound. A relatively low intensity band-to-band transition was also observed at high energy side of the spectrum centred at around 3.33 eV. This peak was decomposed into two close peaks at 3.32 and 3.35 eV using Gaussian fitting. From the temperature behaviour of peak energies of these emissions, the band gap of Li 3 Y 2 (BO 3) 3 was estimated to be 3.35 eV for the first time.