01370naa a2200301 a 450000100080000000500110000800800410001902400550006010000200011524501510013526000090028652003950029565300340069065300210072465300330074565300260077865300210080470000200082570000130084570000150085870000200087370000200089370000170091370000150093070000200094570000260096577300770099121400082022-02-14       2022    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1590/0001-37652021202005122DOI1 aLARA-BERNAL, A.  aCharacterization of Cuban and Brazilian natural zeolites by photoacoustic spectroscopy and electron paramagnetic resonance.h[electronic resource]  c2022  aThis report describes the photoacoustic and electron paramagnetic resonance investigations of Brazilian and Cuban zeolites. Photoacoustic optical absorption measurements indicate the presence of iron (Fe) ions with their respective transition bands for both zeolites. Therefore, this work is intended to cover such lack of data and contribute to the zeolite community providing new results.  aCharacteristic diffusion time  aNatural zeolites  aNonradiative relaxation time  aPhase resolved method  aRacah parameters1 aSILVA, M. G. da1 aMOTA, L.1 aMARÍN, E.1 aCORDEIRO, T. C.1 aSILVA, E. C. da1 aVIANA, D. A.1 aVARGAS, H.1 aPOLIDORO, J. C.1 aMELLO-MONTE, M. B. de  tAnais da Academia Brasileira de Ciênciasgv. 94, n. 1, e20200512, 2022.