Geochemically, the large family of alkaline plutonic rocks (both Qtz-undersaturated and-
oversaturated compositions) can be subdivided into metaluminous [(Na2O+ K2O)< Al2O3] …

The structural hierarchy and stereochemistry have been considered for 24 titanium disilicate
minerals that contain the TS (Titanium Silicate) block, a central trioctahedral (O) sheet, and …

In view of new data on the chemical composition and structure of a series of natural layered
silicates containing three-layer blocks and their corresponding microporous minerals with …

Abstract The Late Cretaceous Itatiaia complex is made up of nepheline syenite grading to
peralkaline varieties, quartz syenite and granite, emplaced in the metamorphic rocks of the …

This study revises the early-magmatic, late-magmatic, and hydrothermal mineral
assemblages occurring in rocks of agpaitic affinity, mainly represented by nepheline …

The minerals of the rosenbuschite group are sorosilicates composed of a framework of 6-to
8-corner polyhedra and rows of Si 2 O 7 dimers. The polyhedra combine into layers (O …

The north-western sector of the Gharyan volcanic field (northern Libya) consists of trachytic-
phonolitic domes emplaced between~ 41 and 38Ma, and small-volume mafic alkaline …

diagram, they plot close to, but to the right of, the NHRL, also typical of OIB samples, roughly
defining a 2.2 Ga reference line (possibly a mixing array). The felsic PC are intermediate …

В свете новых данных о химическом составе и структуре ряда природных слоистых
силикатов, со держащих трехслойные блоки, и связанных с ними микропористых …

Abstract The Saghro Cenozoic lavas form a bimodal suite of nephelinites (with carbonatite
xenoliths) and phonolites emplaced in the Anti-Atlas belt of Morocco. Despite the paucity of …