Os(VIII) doping effects on the properties and crystalline perfection of potassium hydrogen phthalate (KHP) crystals
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Os(VIII) doping effects on the properties and crystalline perfection of potassium hydrogen phthalate (KHP) crystals
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| Creator |
Muthu, K.
Bhagavannarayana, G. Chandrasekaran, C. Parthiban, S. Meenakshisundaram, S. P. Mojumdar, S. C. |
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| Subject |
Chemistry
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| Description |
The effect of dopant, Os(VIII) on the growth
process, crystalline perfection and properties of potassium
hydrogen phthalate (KHP) single crystals grown by a slow
evaporation solution growth technique has been investigated.
The XRD analysis of black-colored doped specimen
reveals slight structural changes as a result of doping. The
SEM images exhibit defect centers and crystal voids. The
complex formation of KHP with Os(VIII) is evidenced by
the considerable shift in kmax of the doped specimen and
enhanced fluorescence intensity is observed by doping.
Differential scanning calorimetry (DSC) and TG-DTA
studies reveal the purity of the sample and no decomposition
is observed up to the melting point. The high resolution
X-ray diffraction (HRXRD) studies used to evaluate
the crystalline perfection reveal some features on the
capability of accommodating the dopant in the crystalline
matrix. The diffraction curve (DC) patterns indicate that
the high valence transition metal predominantly occupies
the interstitial positions and the doping depresses the second
harmonic generation (SHG) efficiency owing to the
deterioration of crystalline perfection disturbing the charge
transfer and nonlinearity.
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| Publisher |
Springer Verlag
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| Date |
2010
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/273/1/238.pdf
Muthu, K. and Bhagavannarayana, G. and Chandrasekaran, C. and Parthiban, S. and Meenakshisundaram, S. P. and Mojumdar, S. C. (2010) Os(VIII) doping effects on the properties and crystalline perfection of potassium hydrogen phthalate (KHP) crystals. Journal of Thermal Analysis and Calorimetry , 100 (3). pp. 793-799. ISSN 1572-8943 |
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| Relation |
http://www.springerlink.com/content/qx32r63h9w220012/
http://npl.csircentral.net/273/ |
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