Dlamini, C.Mhlongo, M.R.Koao, L.F.Motaung, Thabiso EricHlatshwayo, Thulani ThokozaniDwivedi, Y.2021-09-152021-09-152020-10Dlamini, C., Mhlongo, M.R., Koao, L.F. et al. 2020, 'Effects of Er3+ concentration on the structure and optical properties of the MgAl2O4/MgO/Sr3Al2O6/SrAl2O4 mixed phases prepared by the citrate sol gel method', Materials Research Express, vol. 7, no. 10, art. 106302, pp. 1-13.2053-1591 (online)10.1088/2053-1591/abbd04http://hdl.handle.net/2263/81829Please read abstract in the article.en© 2020 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.Sol-gel methodX-ray diffraction (XRD)Article