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Synthesis of carnallite crystal from KCl – MgCl2 solutions and its characterization

  • J. Podder , S. Gao , R. W. Evitts , R. W. Besant and D. Matthews
Published/Copyright: March 8, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 3

Abstract

Carnallite crystals have been synthesized from KCl – MgCl2 brine solutions at room temperature (23 °C) using a solvent evaporation technique. The effects of the concentration of potassium chloride (KCl) and magnesium chloride (MgCl2) on growth, structural and mechanical properties of the carnallite crystal is investigated and discussed. Transparent and pseudo-hexagonal shaped carnallite crystals with dimensions of 4 × 5 × 2 mm to 16 × 13 × 3 mm are shown. The carnallite crystals were characterized using powder X-ray diffraction and the lattice parameters were found to be a = 9.575 Å, b = 16.155 Å and c = 22.526 Å, space group: Pnna, Z: 12, α = β = γ = 90° with a unit cell volume, V = 3 485.04 Å3. The lattice parameters are found to be in good agreement with standard values and the structure of the crystal is orthorhombic. Vickers micro-hardness testing was carried out to determine the hardness and work hardening coefficient of the carnallite crystals.

Keywords: Carnallite crystal; Potassium–magnesium chloride solution; Solvent evaporation; X-ray diffraction; Orthorhombic structure
* Correspondence address, Prof. Richard W. Evitts, Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada, Tel.: +1-306-966-4661, Fax: +1-306-966-4777, E-mail:

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Received: 2013-07-02
Accepted: 2013-09-16
Published Online: 2014-03-08
Published in Print: 2014-03-11

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111013
Keywords for this article
Carnallite crystal; Potassium–magnesium chloride solution; Solvent evaporation; X-ray diffraction; Orthorhombic structure

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Twinning dislocation and twin propagation process in a nickel-base single crystal TMS-82 superalloy
  5. Relationship between austenite stability and martensite formation in modified 9Cr-1Mo steel
  6. The influence of brazing temperature and surface roughness on the wettability of reactive brazing alloys
  7. Thermodynamic modelling of the “Cu2O”–SiO2, “Cu2O”– CaO, and “Cu2O”– CaO – SiO2 systems in equilibrium with metallic copper
  8. The effect of annealing temperature on the corrosion behavior of silver alloyed 2205 duplex stainless steel
  9. Effect of rate of deformation on electromagnetic radiation during quasi-static compression of sintered aluminium preforms
  10. Temperature effect on decorative gold coatings obtained from electrolyte based on mercaptotriazole – comparison with cyanide
  11. High-strength and thermally stable Al – CeO2 composite produced by means of mechanical alloying
  12. Enhancing photocatalytic activity of ZnO nanostructures by doping with Ce+4 ions prepared in water using ultrasonic irradiation
  13. Modified hyperbranched epoxy/clay nanocomposites: A study on thermal, antimicrobial and biodegradation properties
  14. Short Communications
  15. Synthesis of carnallite crystal from KCl – MgCl2 solutions and its characterization
  16. Microwave synthesis of ultrafine and nanosized powders of tungsten oxide and carbide
  17. DGM News
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