The chemistry of Fe and Mn in natural geochemical systems are closely coupled, as Fe and
Mn always co-exist in various forms (eg, hydrated ions, soluble complexes, and particles) in …

Variations in the Dolivo-Dobrovol'sky symmetry index for minerals through time reveal
several factors that influence the emergence of crystalline symmetry in natural processes. Of …

Abstract δ-MnO2 is an important component of environmental minerals and is among the
strongest sorbents and oxidants. The crystalline morphology of δ-MnO2 is one of the key …

The core metabolic reactions of life drive electrons through a class of redox protein
enzymes, the oxidoreductases. The energetics of electron flow is determined by the redox …

While a “volcanic Pompeii” model is well accepted as the cause of mass mortality and
exceptional preservation of the Jehol Biota, no consensus has been reached thus far …

A survey of the average Mohs hardness of minerals throughout Earth's history reveals a
significant and systematic decrease from> 6 in presolar grains to~ 5 for Archean lithologies …

Microbialites are microbial sedimentary structures that constitute some of the oldest traces of
life on Earth. By their deposition in a wide range of sedimentary environments and their …

The occurrence of manganese (Mn) oxides on Mars is believed to be an indicator of an O 2-
rich paleoenvironment of Mars because Mn oxides often form through the oxidation of Mn (II) …

Hundreds of minerals are chiral, that is, they appear in nature in two forms–left-handed and
righthanded. Yet except for quartz, that key structural property remained, by-and-large in the …

Understanding the co-evolution of redox-sensitive minerals is crucial for unraveling Earth's
oxygenation history. In this study, we used a global-scale mineralogical dataset …