The quasi binary systems LaMnO 3 –SrMnO 3 and LaMnO 3 –CaMnO 3 were studied. Both systems show a miscibility gap at intermediate La:Sr and La:Ca ratios below about 1400 °C in air. This phenomenon causes the decomposition of single-phase (La,Sr)MnO 3− x and (La,Ca)MnO 3− x solid solution into La-rich SrMnO 3− x + Sr-rich LaMnO 3− x and La-rich CaMnO 3− x + Ca-rich LaMnO 3− x at lower temperatures, respectively. At 1400 °C in the system LaMnO 3 –SrMnO 3 , a structure transformation of (La,Sr)MnO 3 from orthorhombic to rhombohedral with increasing Sr content was not observed, and the structure of La 0.7 Sr 0.3 MnO 3 was determined to be orthorhombic with a = 0.54927 ± 0.0009 nm, b = 0.54582 ± 0.0009 nm, and c 4 0.76772 ± 0.0034 nm.

We report on new europium, strontium and ytterbium endohedral fullerene cages of the type Eu@C-72, Sr@C-72 and Yb@C-72. Single isomers of Eu@C-72-I, Sr@C-72-II Sr@C-72-II and Yb@C-72-I were isolated by multi-step HPLC for the first time. Details of their synthesis, separation and characterization by LDI-TOF mass spectrometry and UV-vis will be discussed. Additionally, EPR spectroscopy of Eu@C-72-I was performed. A second isomer of europiurn and ytterbium endohedral C-72, Eu@C-72-II and Yb@C-72-II, has been separated by HPLC and identified by LDI-TOF mass spectrometry.

The phase equilibria of the system La2O3–SrO–Mn3O4 in air has been studied. The Perovskite structured phases LaMnO3 and SrMnO3 do not form complete solid solutions below 1350°C. Ternary phases were not found.

The phase equilibria of the La2O3–SrO–CaO–Mn3O4 system in air at 1200°C has been studied. Under these conditions, eight univariant four‐phase equilbria were observed. Quaternary phases, as well as liquid phases, were not observed. Perovskite‐structure phases LaMnO3, SrMnO3, and CaMnO3 did not form complete solid solutions within the system.

The quasi binary systems LaMnO 3 - SrMnO 3 and LaMnO 3 - CaMnO 3 have been studied. Both systems show a miscibility gap below about 1400δC in air. This phenomenon causes the decomposition of single phase (La,Sr)MnO 3−x and (La,Ca)MnO 3−x solid solution with intermediate La:Sr or La:Ca ratios into La rich SrMnO 3−x or CaMnO 3−x and Sr or Ca rich LaMnO 3−x at lower temperatures. At 1400δC a structure transformation of (La,Sr)MnO 3 from orthorhombic to rombohedral has not been observed and the structure of La 0.7 Sr 0.3 MnO 3 has been determined to be orthorhombic with a = 0.54927 ± 0.0009 nm, b = 0.54582 ± 0.0009 nm, and c = 0.76772 ± 0.0034 nm.

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The quasi binary systems LaMnO3 - SrMnO3 and LaMnO3 - CaMnO3 have been studied. Both systems show a miscibility gap below about 1400 degreesC in air. This phenomenon causes the decomposition of single phase (La,Sr)MnO3-x and (La,Ca)MnO3.x solid solution with intermediate La:Sr or La:Ca ratios into La rich SrMnO3-x or CaMnO3-x and Sr or Ca rich LaMnO3-x at lower temperatures. At 1400 degreesC a structure transformation of(La,Sr)MnO3 from orthorhombic to rombohedral has not been observed and the structure of La0.7Sr0.3MnO3 has been determined to be orthorhombic with a = 0.54927 +/- 0.0009 nm, b = 0.54582 +/- 0.0009 nm, and c = 0.76772 +/- 0.0034 nm.

The quasi binary systems LaMnO3–SrMnO3 and LaMnO3–CaMnO3 were studied. Both systems show a miscibility gap at intermediate La:Sr and La:Ca ratios below about 1400 °C in air. This phenomenon causes the decomposition of single-phase (La,Sr)MnO3−x and (La,Ca)MnO3−x solid solution into La-rich SrMnO3−x + Sr-rich LaMnO3−x and La-rich CaMnO3−x + Ca-rich LaMnO3−x at lower temperatures, respectively. At 1400 °C in the system LaMnO3–SrMnO3, a structure transformation of (La,Sr)MnO3 from orthorhombic to rhombohedral with increasing Sr content was not observed, and the structure of La0.7Sr0.3MnO3 was determined to be orthorhombic with a = 0.54927 ± 0.0009 nm, b = 0.54582 ± 0.0009 nm, and c 4 0.76772 ± 0.0034 nm.