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earthlingChina curbs exports of five metals. What are they used for?China has announced sweeping export restrictions on five metals used in the defence, clean energy and other industries.Here is what you need to know about them:<a href="https://mastodon.social/tags/China" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#China</a> <a href="https://mastodon.social/tags/tungsten" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tungsten</a> <a href="https://mastodon.social/tags/indium" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#indium</a> <a href="https://mastodon.social/tags/bismuth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#bismuth</a> <a href="https://mastodon.social/tags/tellurium" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tellurium</a> <a href="https://mastodon.social/tags/molybdenum" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#molybdenum</a>

AkaSci 🛰️It is well understood that massive stars synthesize elements up to Iron (Fe) through nuclear fusion. Most of the elements heavier than Fe are forged in highly energetic events such as supernovae and neutron star mergers in a set of nuclear reactions known as the r-process. A slower s-process is also known to generate some heavy elements. The graphic below shows the cosmogenic origin of elements in the Periodic Table.<a href="https://en.wikipedia.org/wiki/R-process" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://en.wikipedia.org/wiki/R-process</a> <a href="https://www.nhm.uio.no/english/about/organization/research-collections/people/rtronnes/1/epmd/a-n-s-pt/sci19-johnson-periodic-table-nucleosynthesis.pdf" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.nhm.uio.no/english/about/organization/research-collections/people/rtronnes/1/epmd/a-n-s-pt/sci19-johnson-periodic-table-nucleosynthesis.pdf</a> <a href="https://fosstodon.org/tags/JWST" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JWST</a> <a href="https://fosstodon.org/tags/Tellurium" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Tellurium</a> 4/n

AkaSci 🛰️The researchers also did some detective work to figure out the origin of these neutron stars. It is theorized that they began as two normal massive stars, part of a binary system in a nearby spiral galaxy. One of the stars exploded as a supernova and became a neutron star; both stars were ejected from the galaxy. Later, the other star exploded as well. Several million years later and after traveling 120K light-years, the neutron stars merged.<a href="https://www.nasa.gov/missions/webb/nasas-webb-makes-first-detection-of-heavy-element-from-star-merger/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.nasa.gov/missions/webb/nasas-webb-makes-first-detection-of-heavy-element-from-star-merger/</a> <a href="https://fosstodon.org/tags/JWST" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JWST</a> <a href="https://fosstodon.org/tags/Tellurium" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Tellurium</a> 3/n

AkaSci 🛰️Researchers using the JWST recently detected the heavy element tellurium in the ejecta of two colliding neutron stars whose cataclysmic merger was detected in March this year by several observatories.Neutron star mergers create gamma-ray bursts, gravitational waves and many elements with large atomic weights.In the spectral data below, a distinct peak can be seen in the region of the spectrum associated with tellurium. <a href="https://www.nasa.gov/missions/webb/nasas-webb-makes-first-detection-of-heavy-element-from-star-merger/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.nasa.gov/missions/webb/nasas-webb-makes-first-detection-of-heavy-element-from-star-merger/</a> <a href="https://webbtelescope.org/contents/media/images/2023/134/01HAWFJMYS933DDC7NJJE2VFRH" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://webbtelescope.org/contents/media/images/2023/134/01HAWFJMYS933DDC7NJJE2VFRH</a> <a href="https://fosstodon.org/tags/JWST" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JWST</a> <a href="https://fosstodon.org/tags/Tellurium" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Tellurium</a> 1/n

Scientific FrontlineA team including researchers at Argonne and the National High Magnetic Field Laboratory (MagLab) discovered surprising properties in a <a href="https://mastodon.social/tags/magnetic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#magnetic</a> material of iron, <a href="https://mastodon.social/tags/germanium" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#germanium</a> and <a href="https://mastodon.social/tags/tellurium" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tellurium</a>. This material is in the form of a thin sheet that is only a few to 10 <a href="https://mastodon.social/tags/atoms" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#atoms</a> in thickness. It is called a 2D <a href="https://mastodon.social/tags/ferromagnet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ferromagnet</a>. <a href="https://mastodon.social/tags/Physics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Physics</a> <a href="https://mastodon.social/tags/Nanotechnology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Nanotechnology</a> <a href="https://mastodon.social/tags/Technology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Technology</a> <a href="https://mastodon.social/tags/sflorg" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sflorg</a> <a href="https://www.sflorg.com/2023/03/phy03302301.html" rel="nofollow noopener noreferrer" target="_blank">https://www.sflorg.com/2023/03/phy03302301.html</a>

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