The experimental equipment at beam line 7A of the IBR-2 pulsed reactor at J
INR, which includes a texture diffractometer and a high-pressure device, is
used to characterize textural and structural changes of marbles in depende
nce upon directed stress, temperature and time. It was shown, that texture
changes as a consequence of heating are not valid, in contrast, long-acting
load even at moderate stresses led to significant texture modification. Th
e neutron diffraction data are also used to demonstrate its usefulness for
the calculation of the thermal expansion coefficient a: of calcite, and to
calculate the lattice stresses induced by temperature and mechanical stress
es.