The band gap energies EG of the lithium compounds have been measured by transmittance and reflectivity measurements as well as measurements of the diffuse reflectivity. At room temperature EG=2.83 eV (LiInSe2), EG=3.56 eV (LiInS2), EG=3.13 eV (LiGaSe2) and EG=3.62 eV (LiGaS2) have been obtained presupposing a direct interband transition. In a first attempt the birefringence of LiInS2 was studied by transmittance measurements. Using infrared and Raman spectroscopy the lattice vibrational properties have been investigated.
Transparente cdA12S4-und CdAl2Se~-Einkristalle wurden durch chemischen Transport iiber die Gasphase in G r o k n bis zu 15 x 4 x 1 mm3 (CdA12S4) bzw. 10 mm K a n t e n h g e (CdAlzSe4) geziichtet. Die Stijchiometrie der Kristalle wurde mittels Elektronenstrahl-Mikrosonde iiberpriift. Strukturelle Untersuchungen nach der Rietveld-Methode lieferten eine gute Ubereinstimmung der gefundenen mit bekannten Strukturdaten. Aus Transmissions-und Reflektionsmessungen wurde der
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.