Properties are provided for submicron aluminum oxide developed in SAO PKF NK low-cement refractory concretes, and also the LCRC of aluminosilicate composition obtained. It is demonstrated that properties concretes prepared on basis alumina no worse than domestic imported analogs.

Melt inclusions were studied in chrome diopside from the Inagli deposit of gemstones in the Inagli massif of alkaline ultrabasic rocks of potassic affinity in the northwestern Aldan shield, Yakutia, Russia. The chrome diopside is highly transparent and has an intense green color. Its Cr 2 O 3 content varies from 0.13 to 0.75 wt %. Primary and primary–secondary polyphase inclusions in chrome dio...