Diamond Rain

Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities, and you.

Diamond Rain

Besides being planets in our solar system, what do Saturn, Jupiter, Neptune and Uranus have in common? One answer is an abundance of diamonds. In fact, raining diamonds is frequently attributed to these planets.

On our planet, carbon atoms bond together to form diamond crystals under pressures of 725,000 psi (5,000,000 KPa or 5 GPa) and at temperatures of 2000 to 2200°F (1366 to 1478 K), conditions found deep within the earth’s mantle. With high concentration of methane in their atmospheres, the diamond planets just need the right combination of pressure and temperatures. On earth, scientists have dynamically compressed polystyrene (a hydrocarbon plastic) with pressures around 150 GPa (2.176e7 psi) and temperatures around 5,000 K (8540°F) – conditions that resemble the environment around 10,000 km below the surfaces of Neptune and Uranus. They concluded that diamond precipitation may require pressures about ten times as high as previously indicated by static compression experiments – and provided even more proof that diamonds are forever.

The Hope Diamond (Smithsonian Magazine)The Hope Diamond is earth’s most famous diamond.
Source: Smithsonian Magazine.

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The Value of Pressure

Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities, and you.

The Value of Pressure

Pressure makes diamonds” ― George S. Patton Jr.

While Patton was referring to the stress that can transition those who survive it into better individuals, carbon subjected to intense pressure and heat for millions of years turns into diamonds. In fact, the right combination of heat, pressure and time can crystallize many other minerals.

For natural diamonds, the pressure results from their formation at depths of 140 to 190 kilometers (87 to 118 mi) in the Earth’s mantle – below the Earth’s crust.

The Hope Diamond

The Hope Diamond

When Tracy Hall achieved the first commercially successful synthesis of diamond in 1954, a more specific pressure value was identified. Hall used a “belt” press, which was capable of producing pressures above 10 GPa (1,500,000 psi) and temperatures above 2,000 °C (3,630 °F).

Pressure is essential in creating diamonds and other precious gems, but its greatest value is in healthcare. Without your health, everything else means nothing. Blood pressure, respiratory flow, interocular pressure and other pressure measurements indicate good health or a health problem. Cost-effective microelectromechanical (MEMS) pressure sensors provide value by confirming good health or helping diagnose problems to correct them and restore good health.

Comments/Questions?
Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
Email us at info@allsensors.com