Differential scanning calorimetry of univalent dihydrogen phosphates and arsenates

The high temperature phase relations (20°C) of LiH₂PO₄, NaH₂PO₄, KH₂PO₄, RbH₂PO₄, CsH₂PO₄, NH₄H₂PO₄, KH₂AsO₄, RbH₂AsO₄, CsH₂AsO₄ and NH₄H₂AsO₄ have been studied. All materials decompose at higher temperatures. Solid—solid transitions are studied when present and transition temperatures, transition enthalpies, decomposition temperatures, decomposition enthalpies and decomposition products are discussed.     

Isomeric structures of the carbenoid,CHF2Li

The carbenoid, CHF₂Li, is suggested by $\text{ab}$$\text{initio}$ molecular orbital theory to exist in three isomeric forms, none of which corresponds to a classical tetrahedral carbon structure.     

Phase diagram for the ternary system LiClCaCl2CaCrO4

The phase diagram for the system LiClCaCl₂CaCrO₄ has been studied using differential thermal analysis. LiClCaCl₂CaCrO₄ has been shown by X-ray diffraction to be a stable, diagonal section of the Li, Ca//Cl, CrO₄ reciprocal ternary system. The three binary systems are: LiClCaCl₂ which exhibits a double salt (LiCaCl₃), which decomposes without melting at 439°C and a eutectic at 36.3 mole % CaCl₂ (m.p. 487°C); CaCl₂CaCrO₄ which shows a eutectic at 23.4 mole % CaCrO₄ (m.p. 660°C); and LiClCaCrO₄ with a eutectic at 14.3 mole % CaCrO₄ (m.p. 538°C).In the ternary system, a eutectic exists at 63.2 mole % LiCl32.9% CaCl₂3.9% CaCrO₄ (m.p. 479°C). In addition, a four-phase equilibrium, involving all solid phases, exists at nearly all compositions at 435°C.Isotherms are shown for the liquidus surface (primary crystallization) and for the secondary crystallization surface. Isothermal and vertical sections through the ternary phase diagram are shown.     

Studies in qualitative inorganic analysis. Part XLI

Summary The solubility of mercury(II) sulphide in the various reagents used to separate the copper-tin group has been quantitatively investigated. Our results show that with all reagents the solubility of mercury(II) sulphide is largest when tin(IV) and molybdenum(VI) are present and that the use of hydrogen peroxide with potassium hydroxide ensures that at least 95% of the mercury appears in the copper group.

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Zusammenfassung Die Löslichkeit von Queoksilber(II)-sulfid in den verschiedenen, zur Trennung der Kupfer-Zinn-Gruppe verwendeten Reagenzien wurde quantitativ überprüft. Diese Löslichkeit ist dann in allen Reagenzien am größten, wenn Zinn(IV) und Molybdän(VI) zugegen sind. Die Anwendung von Wasserstoffperoxid und Kalilauge gibt die Gewähr, daß mindestens 95% des Quecksilbers in der Kupfergruppe zu finden sind.

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Part XL: Mikrochim. Acta [Wien] 1970, 83.     

Fette, Wachse, Ceresin

Ohne Zusammenfassung     

Farbstoffe

Ohne Zusammenfassung     

Zur Bestimmung von Acetyl, besonders in Sauerstoff-Acetylverbindungen

Ohne Zusammenfassung     

Untersuchung von Mehl und Getreide

Ohne Zusammenfassung