#Venus doesn't have much (if any) #calcite, no limestone, and little if any other carbonates.

Those carbonates instead CO2 in Venus' atmosphere -over 90 times our atmospheric pressure. This gives Venus a surface temperature of 475°C.

Poor Venus.

Calcite for a habitable planet!

#MinCup23 #SolarSystem #CosmoChemistry

Some #corundum on Earth is older than our solar-system; these pre-solar grains are found in some chondritic meteorites. Oxygen isotopes reveal that they formed in the puffed-off atmospheres of old red-giant stars. From Frisch et al. 2005.
#MinCup23 #Cosmochemistry #Meteorites

We have #Moissanite crystals that formed in other stars! Dissolve some meteorites almost completely, and some of the residue is SiC -these grains have carbon and silicon isotopes produced in red giant stars and supernova; from before our solar system formed. See Larry Nittler's (now at Arizona State University #ASU) presentation:
https://www.oca.eu/images/LAGRANGE/EcolesThematiques/Houches_2017/pdf/5a_Presolar_grains_Nittler.pdf
#MinCup23 #Cosmochemistry #Stardust

What a brilliant piece of work involving so many institutions. Science is teamwork!! 😃

One of the main highlights involves the origin of Earth's water: "The near-pristine hydrogen isotopic composition of the Winchcombe meteorite is comparable to the terrestrial hydrosphere, providing further evidence that volatile-rich carbonaceous asteroids played an important role in the origin of Earth’s water"

#cosmochemistry #meteorites #EarthsWater

https://www.science.org/doi/10.1126/sciadv.abq3925

How do you abbreviate "weight percent"?

And if you can, please provide me with a link to a style guide that motivates your choice!

#geochemistry #cosmochemistry #publishing #grammar #astrodon #EarthScience

Wow, so many new people are joining, it's hard to keep up. But great to be building a new world.

In case you missed my first #Introduction, I'm Science Media Producer for Chemistry World at the Royal Society of Chemistry. I like writing and talking about science.

I've a background in #geochemistry and #cosmochemistry having worked on #volcanoes #comets #asteroids using all manner of #massspecrometers and #labinstruments. My career highlights are my #popsci books, which are shown below.