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Asteroid made bizarre diamonds on earth: Study

Published

10 years ago

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New York: Scientists have long argued about the existence of a form of diamond called lonsdaleite associated with impacts by meteorites and asteroids.

A team of scientists largely from Arizona State University (ASU) now show that what has been called lonsdaleite is in fact a structurally disordered form of ordinary diamond.

“So-called lonsdaleite is actually the long-familiar cubic form of diamond but it is full of defects. These can occur due to shock metamorphism, plastic deformation or unequilibrated crystal growth,” explained Piter Nemeth, a former ASU visiting researcher.

The lonsdaleite story began almost 50 years ago.

Scientists reported that a large meteorite called Canyon Diablo, after the crater it formed on impact in northern Arizona, contained a new form of diamond with a hexagonal structure.canyon-diablo-grains

They described it as an impact-related mineral and called it lonsdaleite – after Dame Kathleen Lonsdale, a famous crystallographer.

Since then, lonsdaleite has been widely used by scientists as an indicator of ancient asteroidal impacts on Earth, including those linked to mass extinctions.

The scientists re-examined Canyon Diablo diamonds.

Using the advanced electron microscopes, the team discovered, both in the Canyon Diablo and the synthetic samples, new types of diamond twins and nanometer-scale structural complexity.

The outcome of the new work is that so-called lonsdaleite is the same as the regular cubic form of diamond but it has been subjected to shock or pressure that caused defects within the crystal structure.

The report appeared in the journal Nature Communications.

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Apple is giving a huge discount on its gadgets: Details inside

Published

2 years ago

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May 5, 2022

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If you want to buy an iPhone and were waiting for a nice offer, then we have a piece of good news for you! Amazon Summer Sale May 2022 has begun and they are offering major discounts on various smartphones, laptops, and smart TVs, among others.

The sale is live now on the e-commerce platform with no-cost EMI options and exchange discounts on various products. In addition to this, Amazon has also partnered with several banks including ICICI, Kotak Bank, and RBL so that customers get instant discounts of up to 10% using their cards and EMI transactions.

Customers can easily enjoy this summer sale and get massive discounts on iPhones. They can also compare prices on Flipkart Big Saving Days Sale 2022 before making a purchase.

 

Amazon Summer Sale May 2022: Discount offer on iPhone 13 

Apple’s coveted phone model iPhone 13 in the 128 GB storage model will be available during the Amazon Summer Sale May 2022 for Rs 64,900. The MRP of the phone is Rs 79,900. This means that the customers will be able to enjoy a discount of up to Rs 15,000 on the purchase of the iPhone 13.

If you have an old iPhone in working condition then you will also be eligible to receive another additional discount worth up to Rs 17,000 on the iPhone 13.

Buy at Rs. 64,900 (MRP – Rs. 79,900)

Features of Apple iPhone 13 

The iPhone is powered by an A15 Bionic processor with 6 core CPU. Apart from this, it has 16 core neural engines. With the iPhone 13, up to 512 GB of storage will be available. The iPhone 13 has a 6.1-inch Retina XDR display with 1000 nits brightness.

The iPhone 13 has a 12-megapixel dual rear camera setup. This time a new wide-angle camera has been given, whose aperture is f/1.6. With this, there is support for sensor optical stabilisation. Night mode has been made better than before. The second lens is also 12 megapixels ultra-wide and has an aperture of f/2.4.

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