@misc{EcksteinHohmannWeihrichetal., author = {Eckstein, Nadine and Hohmann, Andrea and Weihrich, Richard and Nilges, Tom and Schmidt, Peer}, title = {Synthesis and Phase Relations of Single-Phase Fibrous Phosphorus}, series = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie}, volume = {Vol. 639}, journal = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie}, number = {15}, issn = {1521-3749}, doi = {10.1002/zaac.201300327}, pages = {2741 -- 2743}, abstract = {Fibrous phosphorus is one of the known crystalline allotropes under standard pressure conditions. It has been predicted prior to its successful synthesis and structural characterization. The allotrope consists of parallel, tubular double strands of phosphorus, in contrast to the violet form of Hittorf's phosphorus, where the same strands are arranged in a perpendicular orientation towards each other. This structural similarity results in an almost identical energetic stability leading to a somehow problematic realization of single-phase materials. We herein report on the successful synthesis route to single phase fibrous phosphorus and the in situ characterization of its formation via the gas phase applying CuCl2 as a mineralizer. The sublimation pressure of fibrous phosphorus is slightly lower than the one of the black allotrope. This behavior indicates thermodynamic stability of fibrous phosphorus.}, language = {en} } @misc{BawohlNilgesSchmidt, author = {Bawohl, Melanie and Nilges, Tom and Schmidt, Peer}, title = {Temperature Initiated P-Polymerization in Solid [Cd3Cu]CuP10}, series = {Inorganic chemistry}, volume = {52}, journal = {Inorganic chemistry}, number = {20}, issn = {1520-510X}, doi = {10.1021/ic401508n}, pages = {11895 -- 11901}, abstract = {[Cd3Cu]CuP10 is the first representative of a class of compounds featuring polyphosphidic adamantine-analogous [P10] units, which tend to be fragmented and polymerized to [P6] rings and tubular [P26] units in the solid state. A new polyphosphide with nominal composition Cd15Cu10P46 results, featuring isolated and polymerized polyanions. Thermoanalytic experiments and phase analytic measurements substantiated the consecutive loss of P4 and Cd of the starting material via different intermediate steps. After P4 loss, the new polyphosphide occurred followed by various binary copper phosphides to the final product Cu3P.}, language = {en} } @misc{EfimovaHubrigSchmidt, author = {Efimova, Anastasia and Hubrig, Grit and Schmidt, Peer}, title = {Thermal stability and crystallization behavior of imidazolium halide ionic liquids}, series = {Thermochimica Acta}, volume = {Vol. 573}, journal = {Thermochimica Acta}, issn = {0040-6031}, doi = {10.1016/j.tca.2013.09.023}, pages = {162 -- 169}, abstract = {The 1-butyl-3-methylimidazolium halide ionic liquids are stable up to temperatures of 246(1) °C ([BMIm]Cl), 260(1) °C ([BMIm]Br), and 238(1) °C ([BMIm]I). The thermal decomposition proceeds in thermogravimetric measurements with a total mass loss of 100\%. Using evolved gas analysis (EGA) a complete degradation of [BMIm]X ionic liquids under formation of characteristic fragments CH3+, NHn+, C4Hn+, and CH3X+ (X = Cl, Br, I) has been observed. [BMIm]Cl shows enantiotropic polymorphism with a phase transition temperature at 30(1) °C, and melts at 74(1) °C (ΔHfus = 18 ± 0.5 kJ mol-1). Spontaneous e-crystallization and reversible phase transition have been found for cooling of the substance.[BMIm]Br melts at 78(1) °C (ΔHfus = 29 ± 0.5 kJ mol-1). The re-crystallization fails and thus a glassy solid is formed. The glass transition temperature is about -65 °C, the cold crystallization occurs between -30 and -20 °C. The application of both homogeneous and heterogeneous nucleation agents does not interfere the glassy state. [BMIm]I undergo solidification without crystallization. The melting effect for the amorphous substance arise at -70(5) °C with ΔHfus = 0.4 ± 0.2 kJ mol-1.}, language = {en} } @incollection{SchmidtBinnewiesGlaumetal., author = {Schmidt, Peer and Binnewies, Michael and Glaum, Robert and Schmidt, Marcus}, title = {Advanced Topics on Crystal Growth}, editor = {Ferreira, Sukarno}, edition = {1. Auflage}, publisher = {Intech Open}, address = {Rijeka}, isbn = {978-953-51-1010-1}, doi = {10.5772/55547}, pages = {228 -- 305}, abstract = {Chemical Vapor Transport Reactions-Methods, Materials, Modeling: A variety of processes of crystal growth proceeds via the gas phase. A short comparative overview on gas phase transports is given here. In the main the concept of Chemical Vapor Transport Reactions is presented.}, language = {en} } @book{BinnewiesGlaumSchmidtetal., author = {Binnewies, Michael and Glaum, Robert and Schmidt, Marcus and Schmidt, Peer}, title = {Chemische Transportreaktionen}, edition = {1. Auflage}, publisher = {De Gruyter}, address = {Berlin}, isbn = {978-3-11-024897-5}, pages = {XIV, 639}, abstract = {Chemische Transportreaktionen weisen ein gemeinsames Merkmal auf: In Gegenwart eines gasf{\"o}rmigen Reaktionspartners, des Transportmittels, wird eine feste oder fl{\"u}ssige Komponente verfl{\"u}chtigt. An anderer Stelle scheidet sie sich meist in Form gut ausgebildeter Kristalle wieder ab. So ist der Chemische Transport z. B. f{\"u}r den Festk{\"o}rperchemiker ein unentbehrliches Verfahren zur Herstellung reiner, gut kristallisierter Feststoffe. Als umfassendes Handbuch behandelt dieses Werk die vielseitigen Aspekte von chemischen Transportreaktionen: Von der Grundlagenforschung bis hin zur praktischen Bedeutung, beispielsweise f{\"u}r die Funktionsweise von Halogenlampen.}, language = {de} } @misc{EfimovaPinnauMischkeetal., author = {Efimova, Anastasia and Pinnau, Sebastian and Mischke, Matthias and Breitkopf, Cornelia and Ruck, Michael and Schmidt, Peer}, title = {Development of salt hydrate eutectics as latent heat storage for air conditioning and cooling}, series = {Thermochimica Acta}, volume = {45}, journal = {Thermochimica Acta}, number = {575}, issn = {0040-6031}, doi = {10.1016/j.tca.2013.11.011}, pages = {276 -- 278}, abstract = {Sustainable air conditioning systems require heat reservoirs that operate between 4 and 20 ◦C. A systematic search for binary and ternary eutectics of inorganic salts and salt hydrates with melting temperatures in this temperature regime and with high enthalpies of fusion has been performed by means of differential scanning calorimetry (DSC). Promising results were obtained for the pseudo-ternary system Zn(NO3)2·6H2O, Mn(NO3)2·4H2O, and KNO3 with the melting temperature range 18-21 ◦C and the enthalpy of fusion of about 110 kJ kg-1. Suitable nucleating and thickening agents have been found and tested to prevent the mixture from supercooling and phase separation.}, language = {en} } @misc{BinnewiesGlaumSchmidtetal., author = {Binnewies, Michael and Glaum, Robert and Schmidt, Marcus and Schmidt, Peer}, title = {Chemical Vapor Transport Reactions - A Historical Review}, series = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie}, volume = {Vol. 639}, journal = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie}, number = {2}, issn = {1521-3749}, doi = {10.1002/zaac.201300048}, pages = {219 -- 229}, abstract = {Since their first recognition in mineral forming processes some 150 years ago chemical vapor transport reactions (CVTR) have attracted continuous scientific interest. Due to the pioneering work of Harald Sch{\"a}fer quantitative understanding and exploitation of transport reactions for crystal growth, synthesis, investigation of high-temperature gas species, and thermodynamic studies have become possible. Renewed interest in CVT is triggered by the demand of material sciences for novel compounds with tailor-made physical properties and by the need for efficient recycling strategies for various metals from industrial waste.}, language = {en} } @book{BinnewiesGlaumSchmidtetal., author = {Binnewies, Michael and Glaum, Robert and Schmidt, Marcus and Schmidt, Peer}, title = {Chemical Vapor Transport Reactions}, edition = {1. Auflage}, publisher = {De Gruyter}, address = {Berlin}, isbn = {978-3-11-025464-8}, pages = {XIV, 642}, abstract = {This comprehensive handbook covers the diverse aspects of chemical vapor transport reactions from basic research to important practical applications. The book begins with an overview of models for chemical vapor transport reactions and then proceeds to treat the specific chemical transport reactions for the elements, halides, oxides, sulfides, selenides, tellurides, pnictides, among others. Aspects of transport from intermetallic phases, the stability of gas particles, thermodynamic data, modeling software and laboratory techniques are also covered. Selected experiments using chemical vapor transport reactions round out the work, making this book a useful reference for researchers and instructors in solid state and inorganic chemistry.}, language = {en} }