Work

Strength α‐Quartz: New Results From High Pressure In Situ X‐Ray Diffraction Experiments

Year: 2026

Type: article

Abstract: We present a suite of 13 uniaxial deformation experiments on fine grained polycrystalline α‐quartz conducted in a D‐DIA apparatus monitored with in situ synchrotron x‐rays. Experimental temperatures range from 25°C to 1199°C with pressures between 1.4 and 3.2 GPa, and strain rates between 3.4 × 10 −6 s −1 and 1.8 × 10 −5 s −1 . Powder diffraction data from the (), (), (), () and () lattice planes were forward modeled using elastic plastic self‐consistent (EPSC) simulations to derive differential stresses. We consistently observe temperature dependent inelastic behavior at low strain which we simulate using an isotropic deformation system in the EPSC model. Our mechanical data is broadly consistent with mechanical data from previous deformation studies conducted in the Griggs solid‐medium deformation apparatus and can be described by a combination of a Guyot and Dorn rate equation for plasticity limited by lattice resistance below 800°C and with a dislocation creep flow low above 800°C.

Source: Journal of Geophysical Research Solid Earth

DOI: 10.1029/2025jb032753

Authors: D. A. Jivanjee Medina, S. Kaboli, B. M. Patterson, P. C. Burnley

Institutions: University of Nevada, Las Vegas, Northeastern University, Los Alamos National Laboratory

Language: English

Topic: High-pressure geophysics and materials

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,070

Funders: U.S. Department of Energy, National Nuclear Security Administration, Argonne National Laboratory