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Chemical composition of the Tertiary black shales of West Sabah, East Malaysia

Chinese Journal Of Geochemistry 2008年第1期27卷 28-35页

作者： Amer M. Burgan Che Aziz Ali sanudin hj tahir School of Environmental and Natural Resources Department of Geology Faculty of Science and Technology University Kebangsaan Malaysia 43600 UKM Bangi Selangor Geology Program School of Science and Technology University Malaysia Sabah 88999 Kota Kinabalu Sabah Malaysia Locked Bag 2073

The X-ray fluorescence and ICP methods were used to analyze 60 outcrop samples of black shale, of which 15 were collected from Belait, 15 from the Setap Shale, 15 from Temburong, and 15 from the Trusmadi for- mations. The average compositions of the shales from the study area are 64.62%, 63.95%, 62.32%, 63.84% SiO2, 1.84%, 2.14%, 2.04%, 1.99% MgO, 2.55%, 3.12%, 2.89%, 2.72% K2O, 0.32%, 0.30%, 0.32%, 0.53% CaO, 5.86%, 6.06%, 7.14%, 6.60% Fe2O3, 207×10-6, 180×10-6, 213×10-6, 200×10-6 Rb, and 56×10-6, 49×10-6, 50×10-6, 32×10-6 Sr for the Setap Shale, Temburong, Belait and Trusmadi samples, respectively. The high Rb/Sr ratios of 3.8, 3.7, 4.2, and 6.1 are attributed to the lowest contents of Sr due to reducing conditions prevailing. The high Rb/K ratio sug- gests either brackish marine or rapid deposition that prevented equilibrium between Rb and K in the shales and ma- rine waters.

关键词：化合物页岩第三纪马来群岛

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Optical Investigation of Sm^(3+) Doped Zinc-Lead-Phosphate Glass

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Chinese Physics Letters 2012年第8期29卷 233-236页

作者： Raja J.Amjad M.R.Sahar S.K.Ghoshal M.R.Dousti S.Riaz B.A.tahir Advanced Optical Material Research Group Faculty of ScienceUniversiti Teknologi Malaysia81310 SkudaiJohorMalaysia Centre for Solid State Physics University of the PunjabQACLahore-54590Pakistan

Samarium doped lead-zinc-phosphate glasses having composition(60-x)P_(2)O_(5)-20PbO-20ZnO-xSm_(2)O_(3) where x=0,0.5,1.0,3.0mol%were prepared by using the melt quenching *** Archimedes method was used to measure their densities,which are used to calculate the molar *** values of densities lie in the range 3.698–4.090 gm/cm^(3) whereas those of molar volume lie in the range of 37.24–40.00 cm^(-3).UV-vis-NIR absorption spectroscopy in the wavelength range 200–2000 nm was carried *** spectra consist of seven absorption peaks corresponding to the transitions from the 6H5/2 ground state to various excited energy *** energy band gap measured from the optical absorbance is found to be in the range of 3.88–4.43 eV and 3.68–4.33 eV for direct and indirect transitions,*** addition,the photoluminescence spectrum shows four prominent emission bands centered at 560,597,642 and 700 nm corresponding to the 4G5/2–6hj(J=5/2,7/2,9/2,11/2)transitions respectively and the intensity of all the bands are enhanced as the concentration of Sm3+ions increases.

关键词： technique transitions bands

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