Aspects in Mining & Mineral Science First Principle Investigations of La0.25Sm0.75O1.5 Structure: Spin Polarized, LDA+U Calculations Alsulaim GM1, El-Amin AA2* and Khalafalla MAH3 1The Eastern Province-Al-Ahsa-King Faisal University, Saudi Arabia 2Physical department, Faculty Science, Aswan Egypt 3Faculty Yanbu, Taibah Arabian *Corresponding author: A El-Amin, Physical Submission: January 25, 2...