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The crystal structure and hydrogen bonding of synthetic konyaite, Na2Mg(SO4)2·5H2O
-
Evelyne M.S. Leduc
,
Ronald C. Peterson
Veröffentlicht/Copyright:
1. April 2015
Abstract
The crystal structure of synthetic konyaite, Na2Mg(SO4)2·5H2O, a = 5.7690(8), b = 23.951(3), c = 8.0460(11) Å, β = 95.425(2)°, V = 1106.8(3) Å3, space group P21/c, Z = 4, was solved using singlecrystal X-ray diffraction. Hydrogen atom positions were determined and the structure solution was refined to R1 = 3.31% and wR2 = 6.28% for the 2167 measured independent reflections. Three distinct cation sites host the Mg and Na atoms in distorted octahedra and eight-coordinated polyhedra. The coordination polyhedra share edges to form compact sheets oriented perpendicular to b and linked to one another by hydrogen bonds. This results in a {010} tabular habit. A comparison of this structure is made to that of blödite [Na2Mg(SO4)2·4H2O], the dehydration product of konyaite. Konyaite is discussed within the context of the Na2O-MgO-SO4-H2O system. This study is part of ongoing investigations into the dehydration mechanisms and phase stability of this system.
Keywords : Konyaite; crystal structure; single-crystal X-ray diffraction; hydrogen bonding; blödite; dehydration; phase stability
Received: 2008-10-29
Accepted: 2009-2-24
Published Online: 2015-4-1
Published in Print: 2009-7-1
© 2015 by Walter de Gruyter Berlin/Boston
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Schlagwörter für diesen Artikel
Konyaite;
crystal structure;
single-crystal X-ray diffraction;
hydrogen bonding;
blödite;
dehydration;
phase stability
Artikel in diesem Heft
- 27Al NMR spectroscopy at multiple magnetic fields and ab initio quantum modeling for kaolinite
- The effect of oxygen fugacity on the olivine to wadsleyite transformation: Implications for remote sensing of mantle redox state at the 410 km seismic discontinuity
- Spectroscopic characteristics of synthetic olivine: An integrated multi-wavelength and multi-technique approach
- Effects of hydration on thermal expansion of forsterite, wadsleyite, and ringwoodite at ambient pressure
- Forsterite, hydrous and anhydrous wadsleyite and ringwoodite (Mg2SiO4): 29Si NMR results for chemical shift anisotropy, spin-lattice relaxation, and mechanism of hydration
- Structural transitions and electron transfer in coffinite, USiO4, at high pressure
- Fe-Mg partitioning between perovskite and ferropericlase in the lower mantle
- Primitive oxygen-isotope ratio recorded in magmatic zircon from the Mid-Atlantic Ridge
- Determination of the potential for extrinsic color development in natural colorless quartz
- X-ray diffraction and Raman spectroscopic study of clinopyroxenes with six-coordinated Si in the Na(Mg0.5Si0.5)Si2O6-NaAlSi2O6 system
- Phase behavior of protoenstatite at high pressure studied by atomistic simulations
- Metasomatic replacement of inherited metamorphic monazite in a biotite-garnet granite from the Nízke Tatry Mountains, Western Carpathians, Slovakia: Chemical dating and evidence for disequilibrium melting
- Shear viscosity and diffusion in liquid MgSiO3: Transport properties and implications for terrestrial planet magma oceans
- Polarized infrared spectroscopic study of diffusion of water molecules along structure channels in beryl
- The vibrational spectrum of lizardite-1T [Mg3Si2O5(OH)4] at the Γ point: A contribution from an ab initio periodic B3LYP calculation
- Origins of Mount St. Helens cataclasites: Experimental insights
- The crystal structure and hydrogen bonding of synthetic konyaite, Na2Mg(SO4)2·5H2O
- Joëlbruggerite, Pb3Zn3(Sb5+,Te6+)As2O13(OH,O), the Sb5+ analog of dugganite, from the Black Pine mine, Montana
- Cathodoluminescence characterization of tridymite and cristobalite: Effects of electron irradiation and sample temperature
- Sequential extraction and DXRD applicability to poorly crystalline Fe- and Al-phase characterization from an acid mine water passive remediation system
- Thermoelasticity of ε-FeSi to 8 GPa and 1273 K
- Demicheleite-(Cl), BiSCl, a new mineral from La Fossa crater, Vulcano, Aeolian Islands, Italy
- Biomineralization associated with microbial reduction of Fe3+ and oxidation of Fe2+ in solid minerals
- Evidence for residual elastic strain in deformed natural quartz
- Mineralogy of mine waste at the Vermont Asbestos Group mine, Belvidere Mountain, Vermont
- Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source
- Structure determination of the 2.5 hydrate MgSO4 phase by simulated annealing
