The Structure of Sr2(VO4)Cl and Sr2(CrO4)Cl and Spectroscopic Properties of Mn5+ - and Cr5+-Doped Sr2(VO4)Cl

Albrecht, Ch.; Cohen, Shmuel; Mayer, I.; Reinen, D.

doi:10.1006/jssc.1993.1341

Cited by 32 publications

(29 citation statements)

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“…28,29,30 They correspond to a d x 2 Ϫy 2 ground state ͑see above͒, indicating an elongated tetrahedral site. 28 In Li 2 MgSiO 4 lattice ͑monoclinic symmetry͒, all tetrahedral sites are more or less distorted and it is difficult to assign the Cr V substitution site on the basis of the sign of the distortion only.…”

Section: Electron Paramagnetic Resonance: Evidence Of Cr Vmentioning

confidence: 99%

Spectroscopic characterization of chromium (IV, V, VI) in Cr:Li2MSiO4 (M=Mg,Zn)

Jousseaume

Vivien

Kahn‐Harari

et al. 2003

Journal of Applied Physics

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To understand the exceptionally long fluorescence lifetime of Cr IV in Li 2 MSiO 4 (M ϭMg,Zn), several spectroscopic investigations are performed on Cr:Li 2 MSiO 4 (M ϭMg,Zn) crystals. X-ray absorption near-edge structure investigations attest that chromium is localized in tetrahedral sites and that Cr VI is the major species while Cr IV is the minor one in both compounds. Electron paramagnetic resonance studies confirm the occurrence of Cr V in elongated tetrahedral environment (d x 2 Ϫy 2 ground state͒, corresponding probably to the silicon site, and suggest the presence of several charge compensation schemes. Fluorescence and fluorescence dynamics of Cr IV :Li 2 MSiO 4 are reported. The very long Cr IV excited state lifetime previously observed on powders samples is confirmed for the crystals ͑117 s at room temperature, 305 s at 30 K for Cr:Li 2 MgSiO 4 ) and is explained by combined contributions to the emission from both 1 E level and the lowest component of the 3 T 2 level, in thermal equilibrium. Contrary to the situation found in most Cr IV activated compounds, the 1 E level lies below the 3 T 2 one.

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Section: Electron Paramagnetic Resonance: Evidence Of Cr Vmentioning

confidence: 99%

Spectroscopic characterization of chromium (IV, V, VI) in Cr:Li2MSiO4 (M=Mg,Zn)

Jousseaume

Vivien

Kahn‐Harari

et al. 2003

Journal of Applied Physics

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“…Cd}Cl"2.655(2) i"!x; 1!y; 1!z Cd}Cl "2.600 (2) ii"x; 1#y; z Cd}Cl"2.600 (2) iii"!1/2#x; 3/2!y; 1/2!z Cd}O(2 )"2.294(4) iv"1/2!x; !1/2#y; !1/2#z Cd}O(2)"2.294 (4) v"1/2!x; 1/2#y;!1/2#z Cd}O(3 )"2.262 (6) vi"x;!1#y; z equatorial plane of the VO square pyramid by 0.542 A s for SrVO…”

Section: Symmetry Codesmentioning

confidence: 99%

Chlorovanadates with Original Chain and Layered Structures: AVO3Cl (A=Ba, Sr, Cd)

Borel¹,

Chardon²,

Leclaire³

et al. 1999

Journal of Solid State Chemistry

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“…This explains why the crystal "eld strength remains constant. It has already been mentioned in the literature that the (MnO )\ anion does not necessarily adopt the host site geometry in other Mn(V)-doped compounds with apatite and spodiosite structure (1,10,15,19). The present work gives further examples of this absence of any matrix e!ect.…”

Section: Inyuence Of the B(v) Cation Site Size On The Coloration Of Mmentioning

confidence: 51%

“…The present work gives further examples of this absence of any matrix e!ect. However, in several cases, very sensitive methods such as EPR (1,10,15,19) have revealed that (MnO )\ ions do experience some distortions, which varies from one host to another, even within the same structural family.…”

Section: Inyuence Of the B(v) Cation Site Size On The Coloration Of Mmentioning

confidence: 99%

“…This could lead to their application as inorganic pigments (1,10,19). The optical properties of several Mn(V)-doped phosphates or vanadates, such as Sr (PO ) Cl (5,11,12), Ba (PO ) Cl (1,2,4,13), Ca (VO )Cl (1,4,13,14), Li PO (4, 15) 2 , have already been studied, for the most part using #uorescence spectroscopy and will serve here as references for the assignment of the Mn(V) optical transitions.…”

Section: Introductionmentioning

confidence: 99%

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