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Topics in Current Chemistry

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Topics in Current Chemistry ( topics-current-chemistry )

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2 Ralf Steudel · Bodo Eckert 2.2.1.3.2 Monoclinicb-S8 .............................. 26 2.2.1.3.3 Monoclinicg-S8 .............................. 27 2.2.1.4 AllotropesofS9............................... 29 2.2.1.5 MonoclinicS10 ............................... 29 2.2.1.6 TheCompoundS6·S10........................... 30 2.2.1.7 OrthorhombicS11 ............................. 32 2.2.1.8 OrthorhombicS12 ............................. 33 2.2.1.9 MonoclinicS13 ............................... 35 2.2.1.10 TriclinicS14 ................................. 36 2.2.1.11 SolidS15 ................................... 37 2.2.1.12 AllotropesofS18 .............................. 37 2.2.1.13 OrthorhombicS20 ............................. 38 2.2.2 IsomersoftheSulfurHomocycles .................. 39 2.2.3 AllotropesConsistingofLongChains................ 40 2.2.3.1 FibrousSulfur(Sy) ............................ 43 2.2.3.2 2ndFibrousandLaminarSulfur(Sw1 andSw2) . . . . . . . . . . 45 2.2.3.3 PolymericSulfurinTa4P4S29 ...................... 49 2.2.4 ConcludingRemarks........................... 50 2.3 PhysicalProperties ............................ 52 2.3.1 MeltingPoints ............................... 52 2.3.2 ThermalBehavior............................. 53 2.3.3 Solubilities.................................. 55 2.3.4 Densities................................... 56 2.3.5 PhotochemicalBehavior......................... 57 2.4 Analysis................................... 59 3 High-PressureAllotropes........................ 59 3.1 Introduction ................................ 59 3.2 Triple Points in the Vicinity of the Melting Curve. . . . . . . . . 61 3.3 High-PressureStructures........................ 62 3.3.1 General.................................... 62 3.3.2 Photo-Induced Structural Changes (p<20 GPa) . . . . . . . . . . 63 3.3.3 High-Pressure High-Temperature Phases (p<20 GPa, T>300 K) 67 3.3.4 HighPressurePhasesabove20GPa ................. 68 3.4 Conclusion ................................. 72 References........................................ 72 List of Abbreviations DAC Diamond anvil cell DSC Differential scanning calorimetry MD Molecular dynamics Sm Polymeric sulfur usually prepared from quenched liquid sulfur STP Standard temperature and pressure conditions

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