Growth and characterisation of gadolinium samarium oxalate single crystals

Abstract

Single crystals of Gadolinium Samarium Oxalate (GSO) are grown by gel method. The crystals are pale yellowish in colour. Morphology and size of the crystals are found to depend on pH of the medium, gel density, concentration of the reactants and acidity of the feed solution. The crystallinity of the grown sample was confirmed by X-ray diffraction studies and the lattice parameters were determined. X-ray diffractogram shows well defined peaks. IR spectrum confirms the presence of water molecules and carboxylic group. EDAX analysis confirms the presence of Gd and Sm in the sample. The thermal decomposition behaviour of the crystal was analysed using TGA and DTA studies.

Single crystal growth and characterization of lanthanum–neodymium oxalate octahydrate

“…In gel diffusion method the corresponding reactants are allowed to react at very slow rate. Mixed rare-earth oxalates including cerium-neodymium oxalate, cerium-lanthanum oxalate [9], lanthanum-samarium oxalate [10], neodymiumpraseodymium oxalate [11] and lanthanum-copper oxalate [12], gadolinium-samarium oxalate [13] and dysprosium-praseodymium oxalate single crystals [14] have been grown by gel diffusion technique using inorganic silica gel as a medium of growth. In the present paper, the growth of La 1.5 Nd 0.5 (C 2 O 4 ) 3 Á 8H 2 O single crystals is achieved using organic agar gel as a medium of growth.…”

Growth and Characterization of Holmium Oxalate Heptahydrate Crystals

“…Due to extremely poor solubility in water and in organic solvents, the single crystals of rare-earth oxalates have been gown by gel diffusion method [17][18][19][20][21][22]. In gel diffusion method the corresponding reactants are allowed to react at very slow rate, thereby minimizing the chances of fast precipitation which often results in the formation amorphous precipitates.…”

Magnetocaloric effect in gadolinium-oxalate framework Gd2(C2O4)3(H2O)6⋅(0⋅6H2O)

“…Lanthanide oxalates were studied for a long time for their optical properties and are generally prepared in the form of single crystals. [20][21][22][23][24][25] They are also used as precursors for the synthesis of ceramics. 26,27 The phases usually described have the composition Ln 2 (C 2 O 4 ) 3 ·nH 2 O, a rich water phase presenting a weight loss of about 53% between 25 and 650…”

“…22,26 The total weight loss of 44.5 wt.% is significantly lower than the value of ∼53% observed in similar compound. 22,23 This indicates a low interstitial or "zeolitic" water content phase. We can distinguish between three different weight losses: (i) 1.5 wt.…”