Understanding the Habit Modification of Ammonium Dihydrogen Phosphate by Chromium Ions Using a Dopant-Induced Charge Compensation Model

Cunningham, D.; Hammond, Robert B.; Lai, Xiaojun; Roberts, K.

doi:10.1021/cm00057a018

Cited by 13 publications

(14 citation statements)

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“…However, the average mosaic spread was found to be around 66 arc sec. The data are consistent with Cr 3+ incorporating within the lattice in a substitutional site, 46 hence causing minimal disruption to the crystal lattice beyond coloration, the latter being due to the Cr 3+ incorporating in an octahedral environment 46 rather than an interstitional environment. 47,48…”

Section: B Analysis Of Pure and Cr 3+ Doped Kdp Crystalssupporting

confidence: 59%

An instrument for combining x-ray multiple diffraction and x-ray topographic imaging for examining crystal microcrystallography and perfection

Lai

Cardoso

et al. 2009

Review of Scientific Instruments

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Diffraction imaging using x-ray topography (XRT) and x-ray multiple diffraction (XRMD) provide valuable tools for examining the growth defects in crystals and the distributions from ideal lattice symmetry (microcrystallography). The topographic x-ray multiple diffraction microprobe (TMDM) combines the complementary aspects of both techniques enabling XRT and XRMD studies within the same instrument providing a useful resource for the structural characterization of materials that are not very stable in vacuum and electron beam environments. The design of the TMDM instrument is described together with data taken on GaAs (001) and potassium dihydrogen phosphate (001).

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Section: B Analysis Of Pure and Cr 3+ Doped Kdp Crystalssupporting

confidence: 59%

An instrument for combining x-ray multiple diffraction and x-ray topographic imaging for examining crystal microcrystallography and perfection

Lai

Cardoso

et al. 2009

Review of Scientific Instruments

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“…Previous work on the habit modi®cation of KDP has suggested that the impurity is incorporated either interstitially (Davey & Mullin, 1974a,b, 1976Fontcuberta et al, 1978;Barret et al, 1989;Eremina et al, 2001, and references therein; or at the substitutional sites, i.e. the potassium site (Byteva, 1968) and the phosphate site (Cunningham et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Habit modification of nearly perfect single crystals of potassium dihydrogen phosphate (KDP) by trivalent manganese ions studied using synchrotron radiation X-ray multiple diffraction in Renninger scanning mode

Lai

Avanci²,

Cardoso

et al. 2003

J Appl Cryst

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The X-ray multiple diffraction technique using synchrotron radiation is applied in the preliminary study of the habit modi®cation of KDP samples as induced by incorporation of the trivalent transition metal cation Mn 3+ . High-resolution Renninger scans of pure and doped KDP were carried out using 400 as the primary re¯ection, echoing the fact that these impurity species were segregated in the {100} growth sector. The analysis of the Renninger scans of the doped KDP crystals is consistent with the presence of the impurity species chemically bound within the KDP crystal structure, as con®rmed through the suppression of the huge observed peak asymmetry, characteristic of perfect crystals. In addition, an extra Renninger-scan peak measured for the doped material is indicative of the impurity atoms occupying interstitial crystallographic sites in the lattice, a result consistent with X-ray standing-wave measurements. Renninger-scan re¯ection curve widths and lattice parameter measurements reveal the decrease in crystalline perfection (increased mosaic spread, ) and lattice contraction of ca 0.4% in the a and c lattice directions at the surface plane for the Mn 3+ -doped KDP samples in comparison with the undoped crystals.

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“…Doping is a well-chosen and widely accepted technique for incorporating the required physical properties in a bulk material for technological applications [1][2][3]. The technique has been extensively explored to modify the properties like electrooptical (photoluminescence), conductivity and crystal growth [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ni2+ Doping on the Growth and Properties of Mn-L-Histidine Hydrochloride Monohydrate Crystals

Chandra

Rani

Parvathi

et al. 2013

International Journal of Inorganic Chemistry

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The main focus of this work had been to grow good quality crystals from amino acids and amino acid-based materials for nonlinear optics (NLO) applications. For the first time, a series of amino acid complexes doped with transition metal ions were grown in our laboratory from aqueous solutions by slow evaporation technique. Ni(II) ion doped Manganese L-Histidine hydrochloride monohydrate (Ni(II)-MnLHICl) crystals were grown on the same lines and were characterized by powder X-ray diffraction (XRD), optical absorption, electron paramagnetic resonance, and infrared absorption studies. From Powder XRD, the unit cell lattice parameters were calculated as = 1.5301 nm, = 0.8928 nm and = 0.6851 nm. From electron paramagnetic resonance (EPR) spectra, isotropic "g" factor and spin hamiltonian parameter A all were calculated as 2.0439 and 20×10 −4 , respectively. From optical absorption studies, crystal field splitting value ( ) and the interelectron repulsion parameters B and C were calculated for Ni 2+ and Mn 2+ as = 850 cm −1 , = 725 cm −1 , = 2640 cm −1 and = 915 cm −1 , = 810 cm −1 , = 2780 cm −1 , respectively. The presence of various functional groups and the modes of vibrations were confirmed by FTIR studies.

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Understanding the Habit Modification of Ammonium Dihydrogen Phosphate by Chromium Ions Using a Dopant-Induced Charge Compensation Model

Cited by 13 publications

References 0 publications

An instrument for combining x-ray multiple diffraction and x-ray topographic imaging for examining crystal microcrystallography and perfection

An instrument for combining x-ray multiple diffraction and x-ray topographic imaging for examining crystal microcrystallography and perfection

Habit modification of nearly perfect single crystals of potassium dihydrogen phosphate (KDP) by trivalent manganese ions studied using synchrotron radiation X-ray multiple diffraction in Renninger scanning mode

Effect of Ni2+ Doping on the Growth and Properties of Mn-L-Histidine Hydrochloride Monohydrate Crystals

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