A. E. MILODOWSKI, D. J. MORGAN
Reactions undergone by leadhillite from the type locality on heating to 1000 °C have been followed using differential thermal analysis (DTA), thermogravimetry (TG), differential scanning calorimetry (DSC), evolved gas analysis, continuous-heating X-ray diffraction (XRD), infrared spectroscopy (IR), and hot stage microscopy. Intermediate decomposition products were identified by X-ray powder photography. At 80 °C, biaxial leadhillite inverts to a uniaxial phase with properties similar to those of susannite, but this higher-temperature modification only partially reverts to the original structure on cooling, taking up to 24 hours for complete reversion. The mineral undergoes two decomposition reactions between 250 and 600 °C, forming PbO and PbCO3 during the first reaction and 4PbO·PbSO4 during the second. A solid-state reaction leads to a formation of α-2PbO·PbSO4 at 650 °C, while melting occurs above 850 °C. The reaction products are discussed in relation to the phase diagrams for the systems PbO-CO2 and PbO-PbSO4, providing insights into the thermal behavior of lead(II) minerals and their complex decomposition pathways.
@article{def5f8b5-7f5c-402d-9a95-8afce5abefea,
title={THERMAL REACTIONS OF LEADHILLITE Pb4SO4(COs)2(OH)2},
author={A. E. MILODOWSKI and D. J. MORGAN},
year={1984},
language={en}
}TY - JOUR TI - THERMAL REACTIONS OF LEADHILLITE Pb4SO4(COs)2(OH)2 AU - A. E. MILODOWSKI AU - D. J. MORGAN PY - 1984 LA - en ER -
A. W. Fahrenwald
This document provides a systematic examination of the occurrence, properties, production, and metallurgical recovery of gold from its ores, with part
This paper addresses the challenge of assessing the feasibility of wind power plant projects at sites with insufficient or no local historic wind data
Important advances in electrochemical engineering technology over the last three decades have fostered the development of a lternative methods to alle