TY - JOUR
T1 - Crystallization and characterization of magnesium methanesulfonate hydrate Mg(CH3SO3)2•12H2O
AU - Genceli Guner, F. Elif
AU - Lutz, Martin
AU - Sakurai, Toshimitsu
AU - Spek, Anthony L.
AU - Hondoh, Takeo
PY - 2010/10/6
Y1 - 2010/10/6
N2 - Records of methanesulfonate acid in ice cores play an important role in reconstruction of the past history of marine productivity, sea ice extent, and major El Niño event activities related to climate changes. Considering the lack of thermodynamic and crystal structure data, crystallization conditions below zero degrees Celsius were mimicked in the laboratory, and magnesium methanesulfonic hydrate crystals, Mg(CH3SO3) 2•12H2O (i.e., [Mg(H2O) 6](CH3SO3)2•6H2O) were grown from solution by cooling crystallization and by eutectic freeze crystallization. The solubility lines between -5 and +21 °C and between 0 and 25 wt % are presented. The eutectic point of the system is detected at -5 °C and 14 wt %. The crystal structure analysis and the molecular arrangement of these crystals were determined using single crystal X-ray diffraction (XRD). Reflections were measured at a temperature of 110(2) K. The structure is trigonal with space group R3 (no. 148). The crystal is a colorless block with the following parameters: a = b = 9.27150(8) Å, c = 21.1298(4) Å, V = 1572.99(4) Å3, Z = 3, and Dcalc = 1.364 g/cm 3. The Raman spectrum of Mg(CH3SO3) 2•12H2O salt has been recorded and the principal absorption modes identified. Thermogravimetric analysis confirmed the stochiometry of the Mg(CH3SO3)2•12H 2O salt.
AB - Records of methanesulfonate acid in ice cores play an important role in reconstruction of the past history of marine productivity, sea ice extent, and major El Niño event activities related to climate changes. Considering the lack of thermodynamic and crystal structure data, crystallization conditions below zero degrees Celsius were mimicked in the laboratory, and magnesium methanesulfonic hydrate crystals, Mg(CH3SO3) 2•12H2O (i.e., [Mg(H2O) 6](CH3SO3)2•6H2O) were grown from solution by cooling crystallization and by eutectic freeze crystallization. The solubility lines between -5 and +21 °C and between 0 and 25 wt % are presented. The eutectic point of the system is detected at -5 °C and 14 wt %. The crystal structure analysis and the molecular arrangement of these crystals were determined using single crystal X-ray diffraction (XRD). Reflections were measured at a temperature of 110(2) K. The structure is trigonal with space group R3 (no. 148). The crystal is a colorless block with the following parameters: a = b = 9.27150(8) Å, c = 21.1298(4) Å, V = 1572.99(4) Å3, Z = 3, and Dcalc = 1.364 g/cm 3. The Raman spectrum of Mg(CH3SO3) 2•12H2O salt has been recorded and the principal absorption modes identified. Thermogravimetric analysis confirmed the stochiometry of the Mg(CH3SO3)2•12H 2O salt.
UR - http://www.scopus.com/inward/record.url?scp=77957707337&partnerID=8YFLogxK
U2 - 10.1021/cg100234e
DO - 10.1021/cg100234e
M3 - Article
AN - SCOPUS:77957707337
SN - 1528-7483
VL - 10
SP - 4327
EP - 4333
JO - Crystal Growth and Design
JF - Crystal Growth and Design
IS - 10
ER -