>>Thanks to the discovery of water trapped inside diamonds from deep underground, geologists are thinking our planet could have much more water inside than we ever knew.<<

>>Only recently flecks of a mineral called calcium silicate perovskite (CaSiO3) were discovered inside a diamond. Despite the mineral’s predicted prevalence in our planet’s geology, it had never been seen – because it forms so far underground.

Similarly, the water molecules from below the transition zone were held under pressure inside flaws in the diamond crystal’s matrix of carbon atoms.

Squeezing water molecules together forces them to arrange themselves into different structures, effectively turning them into forms of ice – and it’s not like the simple stuff you can find in your freezer.

Different pressures can push the water molecules into a range of configurations, and this particular structure is called ice-VII.<<

An interesting read:

https://tokyo3.org/forums/holiday/?side=http%3A//tokyo3.org/forums/holiday/topics/

That link just takes us to some place called the Holiday Forum.

https://www.sciencealert.com/new-ice-vii-diamond-evidence-free-flowing-water-deep-mantle

two more to go….

Bubblecar said:

That link just takes us to some place called the Holiday Forum.

‘sif they’d know anything about science.

>Only recently flecks of a mineral called calcium silicate perovskite (CaSiO3) were discovered inside a diamond. Despite the mineral’s predicted prevalence in our planet’s geology, it had never been seen – because it forms so far underground.

Even that is newsworthy. And I hadn’t heard it called “calcium silicate perovskite” before. Just “perovskite-like structure”. The most common form in the upper mantle has formula (Mg,Fe)SiO3, so the calcium comes as a surprise.

The ice inclusions inside calcium silicate perovskite inside diamond must be tiny, I’d guess way smaller than micron size. Possibly nano size. Too small and the arrangement of water molecules ceases to be a proper crystal.

Bogsnorkler said:

https://www.sciencealert.com/new-ice-vii-diamond-evidence-free-flowing-water-deep-mantle

two more to go….

> Ice-nine is a fictional material that appears in Kurt Vonnegut’s novel Cat’s Cradle.

Ice nine, it really exists. See phase dhagram.