GMPV
Geochemistry, Mineralogy, Petrology & Volcanology
Mike Jollands

Mike Jollands

Mike Jollands is an experimental petrologist at the University of Lausanne in Switzerland. He studies the diffusion and substitution mechanisms of trace elements, making use of high temperature and pressure equipment to simulate volcanic and mantle conditions. www.mikejollands.com

#mineralmonday : lithiophilite

#mineralmonday : lithiophilite

What is it? Lithiophilite, LiMnPO4 What’s it made of? Lithium (Li), manganese (Mn), phosphorus (P) and oxygen (O). The PO4 at the end of the formula makes this a phosphate mineral (phosphorus + oxygen = phosphate). What’s it’s structure? The way the different atoms are arranged in lithiophilite is described as orthorhombic, which means the crystal is built of lots of tiny cuboid- ...[Read More]

#mineralmonday: lazurite

#mineralmonday: lazurite

#mineralmonday: your weekly* dose of obscure mineralogy, every Monday** [*not guaranteed; **or possibly Tuesday-Sunday] What is it? Lazurite. Take a deep breath, the formula is Na3CaAl3Si3O12S.   That’s a lot of elements to digest, what does it mean? Well, the aluminium (Al) and silicon (Si) form tetrahedra (4-faced 3D triangular shapes), with oxygen (O) on the points. These are arrange ...[Read More]

Seven reasons why YOU should propose an EGU 2020 session

Seven reasons why YOU should propose an EGU 2020 session

Did you ever notice that the majority of convenors of the EGU conference sessions seem to be older than you? Have you ever despaired that none of the conference sessions are directly relevant to your work? Does your CV look conspicuously blank in the ‘Service’ section? Have you ever tried to sneak one of your friends into the EGU Friday night party only to be discovered, have your conf ...[Read More]

#mineralmonday : emmonsite

#mineralmonday : emmonsite

#mineralmonday: your weekly* dose of obscure mineralogy, every Monday** [*not guaranteed; **or possibly Tuesday-Sunday] What is it? emmonsite, Fe2Te3O9.2H2O What’s it made of? Iron (Fe), tellurium (Te), oxygen (O) and water (H2O) I think I remember tellurium from chemistry class – remind me what it is? We can more or less divide the elements into the metals and the non-metals – t ...[Read More]