Abstract Princivalleite, Na(Mn 2 Al)Al 6 (Si O 18 )(BO 3 ) (OH) O, is a new mineral (IMA2020-056) of the tourmaline supergroup. It occurs in Veddasca Valley, Luino area, Varese, Lombardy, Italy (46°03’30.74’’N, 8°48’24.47’’E) at centre narrow (2–3 cm wide) vertical pegmatitic vein, few metres long, crosscutting lens flaser gneiss. Crystals are subhedral (up to 10 mm size), azure with vitreous l...

We report the observation of spontaneous and very sharp resistivity jumps at low temperatures in antiferromagnetic itinerant-electron system La0.825Ce0.175Fe12B6. This intermetallic compound undergoes multiple magnetic transformations, antiferromagnetic–ferromagnetic (AFM–FM) ferromagnetic–paramagnetic (FM–PM), triggered by changes both temperature applied field. The magnetoresistance isotherms...

Abstract. Ag8Ge1-xMnxTe6 solid solutions with different manganese content (x = 0; 0.05; 0.1; 0.2) were prepared by alloying and further pressing the powders under a pressure of 0.6 GPa. By X-ray diffraction studies have shown that introduction atoms leads to compressibility lattice. All p-type samples had high resistance below transition at temperatures 180 - 220 K. An increase in electrical co...

Based on the low-cost and relatively high catalytic activity, considerable efforts have been devoted towards developing redox-active transition metal (TM)-oxygen electrocatalysts for alkaline oxygen evolution reaction (OER) while role of redox-inactive earth metals has often neglected in OER. Herein, first time, we developed a novel ternary intermetallic CaFe6Ge6 precatalyst, whose surface rapi...