title: Liquid polymorphism and density anomaly in a three-dimensional associating lattice gas.
abstract: The authors investigate the phase diagram of a three-dimensional associating lattice gas (ALG) model. This model combines orientational icelike interactions and "van der Waals" that might be repulsive, representing, in this case, a penalty for distortion of hydrogen bonds. These interactions can be interpreted as two competing distances, making the connection between this model and continuous isotropic soft-core potentials. The authors present Monte Carlo studies of the ALG model showing the presence of two liquid phases, two critical points, and density anomaly.
authors.affiliation: Universidade Federal de Pelotas-UNIPAMPA/Bagé, Rua Carlos Barbosa SN, CEP 96400-970 Bagé, Rio Grande do Sul, Brazil. mgirardi@fge.if.usp.br
authors.forename: Mauricio
authors.initials: M
authors.lastname: Girardi
authors.forename: Aline L
authors.initials: AL
authors.lastname: Balladares
authors.forename: Vera B
authors.initials: VB
authors.lastname: Henriques
authors.forename: Marcia C
authors.initials: MC
authors.lastname: Barbosa