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Dopant positions in...
Dopant positions in strontium/chromium- and barium-doped KTP, determined with synchrotron X-radiation
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- Norberg, Stefan, 1972 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Streltsov, Victor (author)
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- Svensson, Göran, 1955 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Albertsson, Jörgen, 1939 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2001
- 2001
- English.
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In: Acta Crystallographica Section B: Structural Science. - 0108-7681 .- 1600-5740. ; 56:6, s. 980-987
- Related links:
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Abstract
Subject headings
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- Structure factors for strontium/chromium- (Sr/Cr) and barium- (Ba) doped potassium titanyl phosphate (KTiOPO4, KTP) were measured with focused synchrotron X-radiation [0.75000 (9) Angstrom] using a fast avalanche photodiode counter. Space group Pna2(1), Z = 8,a = 12.786 (2), b = 6.3927 (8), c = 10.5585 (9) Angstrom, T = 293 (1) K, R = 0.028 (SrCrKTP); a = 12.851 (6), b = 6.418 (3), c = 10.620 (5) Angstrom, T = 120 (1) K, R = 0.031 (BaKTP). The refinement of the dopant positions showed that Ba2+ is positioned in the larger of the two K cavities of KTP, while the smaller Sr2+ ion is located in both. Split positions are found for the strontium dopant in both cavities and they are located in the positive c direction from the potassium cation. The chromium dopant has two different oxidation states, namely +III and +VI; in both states the dopant is located inside the TiO6 octahedra. The two structures show slightly less distorted TiO6 octahedra than pure KTP.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Keyword
- Crystal Structure
- Potassium Titanyl Phosphate
- Isomorphous Substitution
Publication and Content Type
- art (subject category)
- ref (subject category)
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