It is one of the worst rail disasters in Europe's modern history, and Spain's worst crash since 2013.
The LMB paid tribute to the scientist and described her death as a profound shock and a huge loss.
The expert in cell biology ran the Shahbazi Laboratory at the LMB, based on the Cambridge Biomedical Campus.
"Marta was an inspiring, talented and passionate scientist whose research shed light on the earliest steps in the development of human embryos and how errors occur that lead to failed pregnancies,"the LMB said.
The LMB said:"As a wife and mother of two young children, Marta wrote eloquently about balancing her family and career, serving as a much-admired role model for a 'mother scientist', a term she used to describe herself.