There is only one file type that uses the .LPMD extension:
LPMD Molecular Data File
File created in the Las Palmeras Molecular Dynamics (LPMD) format, a file format used for storing molecular data; contains information about one or more atomic configurations; used by the LPMD software for analyzing, converting, and visualizing molecular dynamics data.
LPMD files are stored in an ASCII text format.
Updated: November 14, 2012