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Updated: Jan 7, 2026

$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$

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Published on: October 7, 2013

Structural Evolution of CoMoO₄ under Pressure: Multiphase Transformations and Reconstructive Behaviors.

Xinxin Gao^1,2, Zhi Zheng¹, Mengjun Xiong^1,2

¹Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China.

Inorganic Chemistry

|December 29, 2025

Summary

This summary is machine-generated.

Thin cobalt molybdate (CoMoO4) samples show two phase transitions under high pressure, demonstrating enhanced structural resistance. This research clarifies their behavior under extreme conditions.

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Published on: October 10, 2014

Area of Science:

Materials Science
Solid State Chemistry
Geophysics

Background:

Binary transition metal molybdates exhibit diverse properties and applications.
Limited data exists on the high-pressure behavior and phase transition resistance of multiphase molybdates.

Purpose of the Study:

To investigate the high-pressure structural characteristics and phase transitions of cobalt molybdate (CoMoO4).
To assess the pressure-induced structural reconstruction and phase transition resistance in thin CoMoO4 samples.

Main Methods:

Utilized a diamond anvil cell for high-pressure generation.
Employed in situ laboratory Raman spectroscopy and X-ray diffraction (XRD).
Conducted synchrotron radiation X-ray diffraction for detailed structural analysis up to 28 GPa.

Main Results:

β-CoMoO4 underwent two gradual phase transitions up to 28 GPa.
An initial transition to the α-phase occurred around 1 GPa.
A high-pressure phase (HP-phase) emerged around 12 GPa, becoming dominant by 17-18 GPa with hysteresis.
Thin samples showed enhanced structural resistance compared to previous studies.
Upon pressure release, CoMoO4 largely reverted to the β-phase, retaining a trace of the HP-phase.

Conclusions:

Elucidated the two-stage phase transitions and pressure-induced structural reconstruction of thin CoMoO4.
Demonstrated enhanced structural resistance in thin CoMoO4 samples under high pressure.
Contributed to the fundamental understanding of binary transition metal molybdates under extreme conditions.