SE REALIZARON CÁLCULOS AB INITIO DEL COMPUESTO SUPERCONDUCTORMGB2 UTILIZANDO EL PAQUETE COMPUTACIONAL WIEN97, EL CUAL UTILIZA EL MÉTODO FLAPW (FULL-POTENTIAL LINEARIZED AUGMENTED PLANEWAVES) PARA EL CÁLCULO DE LAS PROPIEDADES ELECTRÓNICAS. SE PRESENTAN CÁLCULOS DE ENERGÍA TOTAL, BANDAS DE ENERGÍA, DENSIDAD DE ESTADOS Y DENSIDAD DE CARGA ELECTRÓNICA, UTILIZANDO PARÁMETROS DE RED EXPERIMENTALES. EN ESTE TRABAJO SE HACE UN PARTICULAR ÉNFASIS EN EL ANÁLISIS DE LA DISTRIBUCIÓN DE CARGA. A PARTIR DE LOS CÁLCULOS DE ENERGÍA TOTAL SE DETERMINAN LOS PARÁMETROS DE RED EN EL EQUILIBRIO, LOS CUALES DIFIEREN EN MENOS DEL 1% DE LOS VALORES EXPERIMENTALES; DE LOS CÁLCULOS DE DENSIDAD DE CARGA SE OBSERVA UNA TRANSFERENCIA DE CARGA HACIA EL PLANO DE LOS ÁTOMOS DE BORO Y EL CARÁCTER COVALENTE DEL ENLACE B-B, ADEMÁS DE OBSERVARSE LA EXISTENCIA DE ENLACES TIPO METÁLICO Y PARCIALMENTE IÓNICO.AbstractWE PRESENT AB-INITIO CALCULATIONS OF THE ELECTRONIC PROPERTIES OF SUPERCONDUCTOR MGB2 USING A WIEN97 COMPUTATIONAL CODE, WHICH USE A FLAPW (FULL-POTENTIAL LINEARIZED AUGMENTED PLANE WAVES) METHOD TO CALCULATE ELECTRONIC PROPERTIES. TOTAL ENERGY, BAND STRUCTURE, DENSITY OF STATES AND CHARGE DENSITY ARE CALCULATED EMPLOYING EXPERIMENTAL LATTICE PARAMETERS. THIS WORK HAS SPECIAL INTEREST IN THE ANALYSIS OF CHARGE DENSITY. FROM TOTAL ENERGY CALCULATIONS WE OBTAIN THE LATTICE PARAMETERS IN EQUILIBRIUM, AND THEY AGREED TO 1% WITH THE EXPERIMENTAL ONES; FROM CHARGE DENSITY CALCULATIONS WE OBSERVE CHARGE TRANSFERENCE TO BORON ATOMS PLANES AND THE COVALENT CHARACTER OF THE BOND B-B, BESIDES WE OBSERVE THE PRESENCE OF TYPE METALLIC AND PARTIALLY IONIC BONDS.WE PRESENT AB-INITIO CALCULATIONS OF THE ELECTRONIC PROPERTIES OF SUPERCONDUCTOR MGB2 USING A WIEN97 COMPUTATIONAL CODE, WHICH USE A FLAPW (FULL-POTENTIAL LINEARIZED AUGMENTED PLANE WAVES) METHOD TO CALCULATE ELECTRONIC PROPERTIES. TOTAL ENERGY, BAND STRUCTURE, DENSITY OF STATES AND CHARGE DENSITY ARE CALCULATED EMPLOYING EXPERIMENTAL LATTICE PARAMETERS. THIS WORK HAS SPECIAL INTEREST IN THE ANALYSIS OF CHARGE DENSITY. FROM TOTAL ENERGY CALCULATIONS WE OBTAIN THE LATTICE PARAMETERS IN EQUILIBRIUM, AND THEY AGREED TO 1% WITH THE EXPERIMENTAL ONES; FROM CHARGE DENSITY CALCULATIONS WE OBSERVE CHARGE TRANSFERENCE TO BORON ATOMS PLANES AND THE COVALENT CHARACTER OF THE BOND B-B, BESIDES WE OBSERVE THE PRESENCE OF TYPE METALLIC AND PARTIALLY IONIC BONDS.