Stichtite: a review

Abstract

Stichtite is a naturally occurring layered double hydroxide (LDH) with the ideal chemical formula Mg6Cr2CO3(OH)16.4H2O. It has received less attention in the literature than other LDHs and is often described as a rare mineral; however, abundant deposits of the mineral do exist. In this article we aim to review a number of significant publications concerning the mineral stichtite, including papers covering the discovery, geological origin, synthesis and characterizsation of stichtite. Characterization techniques reviewed include powder X-ray diffraction (XRD), infrared spectroscopy (IR), near infrared spectroscopy (NIR), Raman spectroscopy (Raman), thermogravimetry (TG) and electron microprobe analysis.

Insights on Structure and Threshold Detection Limits of Stichtite (Magnesium-Chromium Carbonate-Hydroxide) by Fourier Transform Infrared Analysis

“…The stichtite spectra also shows a dominant peak at 1638 cm −1 which is a deformation mode of molecular water. This is consistent with what is known about the structure of stichtite from other studies [4,39].…”

“…Stichtite has a waxy to pearly luster and has never been reported as macroscopic crystals, but occurs as fine, platy to acicular aggregates of crystallites to crystals typically less than 2 mm in the longest dimension. An excellent review of stichtite is found in Reference [4].…”

Sorption of Congo Red anionic dye on natural hydrotalcite and stichtite: kinetics and equilibrium

“…Krivovichev et al (2012) and Zhitova et al (2018) provide detailed descriptions of the mineralogies of a variety of representatives of the hydrotalcite supergroup. Stichtite was described in the comprehensive review by Theiss et al (2013). Using natural minerals for the removal of water pollutants is very attractive as the structure of the minerals of the hydrotalcite supergroup makes them the only natural anion exchangers (de Castro et al , 2018).…”