Ein Aufbaumodell f�r ?Chimney-Ladder?-Strukturen

Disorder in the composite crystal structure of the manganese `disilicide' MnSi1.73from powder X-ray diffraction data

“…Later, the Nowotny chimney ladder phases were described as intergrowth variants built of three different basic segments. This approach yielded a list of possible space groups, atomic positions and coordinates for possible commensurate structural motifs in this group of intermetallic compounds (Grin, 1986).…”

Structural, Magnetic and Thermoelectric Properties of hp‐Mn3Ge5

“…Higher manganese silicides (HMS) have been in the focus of extensive experimental and theoretical research because of their intricate interplay between crystal structure, composition and physical properties. [1][2][3][4][5][6][7][8][9][10][11] HMS compounds are good candidates for a high thermoelectric Figure of merit as the complex atomic pattern of the Nowotny chimney-ladder (NCL) arrangements [12][13][14] is a promising prerequisite for achieving a reduced lattice contribution to the thermal conductivity. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] With the general formula T n E m (T = transition metal, E = main group element and 2 Ͼ m/n Ͼ 1.25), NCL compounds are crystallographically characterized by two discrete subunits: a tetragonal partial structure formed by T atoms and an m-fold helix made of E atoms, both running parallel to the [001] direction and each one with own periodicity.…”

“…Higher manganese silicides (HMS) have been in the focus of extensive experimental and theoretical research because of their intricate interplay between crystal structure, composition and physical properties . HMS compounds are good candidates for a high thermoelectric Figure of merit as the complex atomic pattern of the Nowotny chimney‐ladder (NCL) arrangements is a promising prerequisite for achieving a reduced lattice contribution to the thermal conductivity .…”

An Impedance Study of the Membrane Polarisation Effect in Simulated Rock Systems

“…Wtrlle the dominant clay-mineral component of bentonite Ls nontnorillonlte, other clay ninerals partLcularly illite and kaolinite are usualJ.y present as are non-clay nlnerals notably cristobalite and sLlLca ( 86 ) . As euchrin extensive purifJ.cation process was employed to remove soluble and non-colloidal Lnpuritles (137) frosr Wlrorning bentonite before it was used in this work.…”