CRYSTALLINE MATERIAL, METHOD OF CRYSTAL MANUFACTURE, RADIATION DETECTOR, NON-INFRINGING DEVICE AND VISUALIZATION DEVICE Russian patent published in 2018 - IPC C30B29/34 C30B11/00 C30B11/10 C30B13/00 C30B15/00 C30B15/08 C30B15/34 C09K11/78 C09K11/79 A61B6/03 G21K4/00 G01T1/161 G01T1/202 C30B28/06 C30B28/08 C30B28/10 C04B35/16 

FIELD: physics.

SUBSTANCE: invention relates to a technology for producing a scintillational crystalline material for radiation detectors used for positron emission tomography (PET), X-ray computed tomography (CT), various radimeters in the field of high energy physics, resource-extraction devices. Crystalline material is represented by general chemical formula (RE_xA_1-x-y-sB_yM'_s)_2+α(Si_1-t,M''_t)_2+βO_7+γ, has a pyrochlore type structure, has a non-stoichiometric composition and is a congruent melting compound. In the chemical formula, A contains at least one or more, selected from Gd, Y, La, Sc, Yb and Lu; B comprises at least one or more, selected from La, Gd, Yb, Lu, Y and Sc; 0.1 < y < 0.4; RE contains at least one or more selected from Ce, Pr, Nd, Eu, Tb and Yb; 0 < x < 0.1; M' and M'' contain at least one or more, selected from Li, Na, K, Mg, Ca, Sr, Ba, Ti, Zr, Hf, Fe, Ta and W; 0 ≤ s < 0.01 and 0 ≤ t < 0.01; and 0 < |α| < 0.3, and 0 ≤ |β| < 0.3, and 0 ≤ |γ| < 0.5.

EFFECT: resulting material has a high-quality transparent volumetric body, has a large glow and a short fluorescence lifetime.

15 cl, 14 dwg, 3 tbl