TY - JOUR
T1 - Luminescence characterization of a sodium-rich feldspar
AU - Correcher, V.
AU - Garcia-Guinea, J.
AU - Sanchez-Muñoz, L.
AU - Rivera, T.
N1 - Funding Information:
We are grateful to Prof Dr P.D. Townsend for the analyses in the high sensitivity spectrometer of Sussex (UK). This work has been supported by the CICYT CGL2004-03564/BTE and Comunidad Autonoma de Madrid (CAM) MATERNAS (S-0505/MAT/0094) projects. Thanks are also given to Paul Giblin for the critical review of the manuscript.
PY - 2007/10
Y1 - 2007/10
N2 - We, herein, report on the radioluminescence and thermoluminescence properties of a sodium-rich feldspar ((Na,K)[AlSi3O8]) with a mean molecular composition of orthoclase (Or) and Albite (Ab) of Or1Ab99. Despite the complexity of the luminescence emissions of the sample, it is possible to determine six different emission bands at about 300, 380, 420, 460, 550 and 680nm. The 300nm emission can be associated to structural defects related to the recombination process in which the diffusion of Na ions is involved. The UV-blue emission bands have the following features: (i) the 380nm, typical of mineral phases containing SiO4 groups, is related to intrinsic defects in the lattice; (ii) the 420nm band is associated with the presence of Cu(II) ions close to the hole traps or the recombination on a centre formed from a hole-oxygen atom adjacent to two Aluminum atoms (Al-O-Al) and (iii) the 460nm waveband is due to the presence of Ti4+. The green and red emissions are, respectively, associated with the presence of Mn2+ and Fe3+ ions. The ratio between the relative intensities, peaked at 290 (the more intense waveband) and 550nm is about 10 for both TL and RL, which implies that the efficiency of recombination centres does not change regardless of the type of the process.
AB - We, herein, report on the radioluminescence and thermoluminescence properties of a sodium-rich feldspar ((Na,K)[AlSi3O8]) with a mean molecular composition of orthoclase (Or) and Albite (Ab) of Or1Ab99. Despite the complexity of the luminescence emissions of the sample, it is possible to determine six different emission bands at about 300, 380, 420, 460, 550 and 680nm. The 300nm emission can be associated to structural defects related to the recombination process in which the diffusion of Na ions is involved. The UV-blue emission bands have the following features: (i) the 380nm, typical of mineral phases containing SiO4 groups, is related to intrinsic defects in the lattice; (ii) the 420nm band is associated with the presence of Cu(II) ions close to the hole traps or the recombination on a centre formed from a hole-oxygen atom adjacent to two Aluminum atoms (Al-O-Al) and (iii) the 460nm waveband is due to the presence of Ti4+. The green and red emissions are, respectively, associated with the presence of Mn2+ and Fe3+ ions. The ratio between the relative intensities, peaked at 290 (the more intense waveband) and 550nm is about 10 for both TL and RL, which implies that the efficiency of recombination centres does not change regardless of the type of the process.
KW - Na-rich feldspar
KW - Radioluminescence
KW - Spectral emission
KW - Thermoluminescence
UR - http://www.scopus.com/inward/record.url?scp=35448960257&partnerID=8YFLogxK
U2 - 10.1080/10420150701482063
DO - 10.1080/10420150701482063
M3 - Artículo
AN - SCOPUS:35448960257
SN - 1042-0150
VL - 162
SP - 709
EP - 714
JO - Radiation Effects and Defects in Solids
JF - Radiation Effects and Defects in Solids
IS - 10-11
ER -