Lead magnoniobate crystal structure determination

The single crystal structure of lead magnoniobate PbMg1/3Nb2/3O3 was determined at 20-degrees-C using data collected with an X-ray automatic four circle diffractometer. The average structure is cubic with space group Pm3m and exhibits important atomic shifts from the special positions of the cubic perovskite structure. The disordered local positions as well as the thermal parameters have been refined to final R index and weighted R(w) index of 0.0368 and 0.0378, respectively. Results are discussed in comparison with previous ones obtained by other techniques

High-temperature form of neodymium orthoborate, NdBO3

International audienceThe framework of the high-temperature modification of NdBO3 is built up from NdO8 dodecahedra sharing edges and BO3 groups. The NdO8 polyhedra form corrugated sheets approximately parallel to the (111) plane and the borate groups are arranged in rows running parallel to the [011] direction. The Nd—O distances range from 2.315 (3) to 2.697 (4) A ° and the B—O distances from 1.346 (6) to 1.407 (6) A ° . The title structure is isotypic with triclinic EuBO3

Fruit quality prediction on cider apple: effect of annual fruit load, soil and climate

Monitoring during 12 years, a network of about twenty plots in commercial orchards was used to analyse the respective influence of soil, climate and trees load, on fruit quality at harvest for two important varieties of cider apples: Douce Coëtligné and Douce Moën. A first analysis was conducted to compare the quality results of the two cultivars, to define the load levels and soil types able to explain some of the fruit variability, and to propose a first prediction of the quality at harvest acMonitoring during 12 years, a network of about twenty plots in commercial orchards was used to analyse the respective influence of soil, climate and trees load, on fruit quality at harvest for two important varieties of cider apples: Douce Coëtligné and Douce Moën. A first analysis was conducted to compare the quality results of the two cultivars, to define the load levels and soil types able to explain some of the fruit variability, and to propose a first prediction of the quality at harvest according to growing conditions defined as combinations of variety x load x soil. It was shown that fruit load effect was often predominant. In a second step, PLS method with cross-validation has been used to predict the remaining variability of fruit quality around the previous defined reference value (depending on load and soil). At this stage, annual characteristics of climate from bud break to fruit ripening, were supposed to be the main factors able to modulate the reference value. Promising results were obtained with the variety Douce Moën to estimate fruit weight, density and acidity of juice with a quite good quality of estimation

Intermediate temperature solid oxide fuel cell based on BaIn0.3Ti0.7O2.85 electrolyte

International audienc

Water incorporation into the (Ba(1-x)Lax)(2)In2O5+x square(1-x) (0 <= x < 0.6) system

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