Insight the effect of rigid boron chain substructure on mechanical, magnetic and electrical properties of β-FeB

Synthesis of Ni–B Compounds by High-Pressure and High-Temperature Method

“…And it is easy to find the growth step in microsize particles, and the B also have three forms of small ball-like B, dispersive B, and agminated B in the samples (Figures S4–S7). So, the Ni 2 B, α-Ni 4 B 3 , β-Ni 4 B 3 , and NiB are synthesized, even though a bit of boron in the samples, but it will not dramatically influence the properties of samples, ,, because the major form of B is small ball-like B, which is at local position and will influence the local properties. If the major form of B is dispersive B, it will exhibit distinct properties.…”

“…And controlling the pressure and temperature conditions can effectively control the growth rate of Ni–B compounds. Over the past decade, many single-phase bulk samples of TMBs are synthesized by HPHT. ,− However, single phase Ni–B compounds synthesized by HPHT are still rarely reported. Uncovering the growth mechanism of Ni–B compounds under HPHT is meaningful.…”

“…synthesized, even though a bit of boron in the samples, but it will not dramatically influence the properties of samples, 25,44,45 because the major form of B is small ball-like B, which is at local position and will influence the local properties. If the major form of B is dispersive B, it will exhibit distinct properties.…”

Boron Substructures in Inorganic Borides: Network Topology and Free Space

“…The crystal chemistry of boron always attracted great attention of experimentalists and theoreticians, thanks to the extremely rich diversity of the atomic architectures mostly caused by a unique ability of boron atoms to form structural groups of different composition, size, and extension. − At present, more than one thousand binary and ternary inorganic borides have been obtained, which crystallize in more than 150 different structural types . When describing a boride crystal structure, one assigns it to a certain structure type and characterizes the structural groups composed of boron and/or metal atoms, their mutual arrangement, and coordination polyhedra. − Depending on the composition of the boride, i.e., the B/Me ratio, one can distinguish metal-rich or boron-rich borides . In the boron-rich compounds, B/Me starts from four in MeB 4 , while metal-rich borides are characterized by B/Me < 1.…”

“…Boron atoms can either be surrounded by only metal atoms or form a plethora of connected motifs from dumbbells (for example, in Nd 2 Fe 23 B 3 ) and other 0D molecular species (for example, B 14 cuboctahedra in Y 3 Fe 62 B 14 ) to periodic one-dimensional (1D) chains, two-dimensional (2D) layers, and three-dimensional (3D) frameworks of different architectures. Most typical 1D boron groups are zigzag chains with a parallel or perpendicular direction relative to each other; − however, lithium borides LiB x ( x = 0.82–1.0) contain linear cumulene-like boron chains with equidistant atoms . 2D boron structural groups are diverse, but honeycomb-like layers with a variety of conformations in the form of a flat layer, armchair, or bath are the most common. , In general, the increase of the B/Me ratio leads to the appearance of polymeric boron substructures and to a further increase of their periodicity.…”