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Crushed, zapped, boiled and baked

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geemong

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  • Dołączył(a): 18 lut 2022, o 09:55

Crushed, zapped, boiled and baked

Post3 lip 2022, o 08:47

Crushed, zapped, boiled and baked


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When the penguins poop on Antarctica's Elephant Island, a little bit of magic happens in the soil.

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Chemical reactions produce a dull brown mineral called spheniscidite. It's unique and reflects the special conditions that exist only in that locality.

The name comes from Sphenisciformes - the label used to describe penguins' grouping in the avian tree of life.

The crystalline compound is just one of roughly 6,000 such minerals recognised today by the International Mineralogical Association.

But the IMA's classification system, which describes so much of the "hard stuff" all around us, has just undergone something of a reboot.

Dr Robert Hazen from the Carnegie Institution for Science in Washington DC has spent the past 15 years reclassifying the minerals to add information about their genesis.

"There's been a classification system in place for almost two centuries that's based on the chemistry and the crystal structure of minerals, and ours adds the dimensions of time and formation environment," he told the Science In Action programme on the BBC World Service.

Simply put, minerals are specific combinations of chemical elements arranged into an ordered, crystalline form. All of Earth's rocks are built from different aggregations.

You'll know some of the most common ones, such as feldspar, quartz and mica, which make up the granite in a kitchen worktop.

But with colleague Dr Shaunna Morrison, the Carnegie Institution researcher has tried to give the thousands of different mineral species some extra context.

The point the pair are making is that you can't truly appreciate the significance of a mineral unless you also understand how and when it formed. Their research shows nature has used 57 "recipes" to create 10,500 of what they like to call "mineral kinds" - by crushing, zapping, boiling, baking and more.

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