Compressibility and structure behaviour of maruyamaite (K-tourmaline) from the Kokchetav massif at high pressure up to 20 GPa

Crystal Growth and Complex Characterization of Novel Gallium- and Germanium-Rich Tourmalines: Refinement of the Crystal Structure, Cation Distribution, and Raman and Mössbauer Spectroscopy

“…Continued interest in the members of the tourmaline supergroup and the systematic study of synthetic tourmalines with different chemical compositions ,, is associated with searching for new ways of synthesis and obtaining novel species (in particular, to find the synthetic analogues of possible mineral phases) as well as with the geochemical, geochronological, and geothermometric investigations and behavior of the tourmaline structure at high pressure. − Recently, the problem of growing tourmaline crystals on seed crystals in hydrothermal conditions has been partially solved. , The main difficulties in obtaining large-size tourmaline crystals are typically caused by the complex chemical composition and growth factors, such as low growth rates, predominantly monodirectional growth, high P–T conditions of synthesis, and corrosive solutions. Besides, the growth of tourmaline crystals by melt or flux methods is difficult due to the high viscosity of the aluminosilicate melt and remains challenging for various compositions.…”