Francium sources It naturally exists in uranium minerals, although the Earth's crust most likely contains less than one ounce of francium at any given moment. Francium may be synthesized artificially by bombarding thorium with protons. The resulting product is a mixture of radium and actinium.
Because it is so rare, francium is found mainly in laboratories or industrial sites where it is used for research or manufactured goods. It is never found in nature in large quantities. Some examples of places where you might find francium include a laboratory at Los Alamos National Laboratory, New Mexico, USA, a research institution that studies nuclear physics; another laboratory at the Institut Laue-Langevin in France; or facilities at universities or other research institutions.
Frantiucum has a half-life of 17.7 days and is thus quickly destroyed when it is not kept under special conditions. However, even if it is not used for many years, some francium will still remain because its atoms are constantly decaying. This means that new elements are being produced all the time within our planet's crust through a process called radioactive decay.
In fact, according to scientists' estimates, 1 gram of crust contains about 10-18 grams of francium.
Francium occurs naturally in uranium minerals to a relatively low amount. Nonetheless, it has been calculated that the earth's crust contains between 340 and 550 grams of francium at any given moment. This estimate takes into account that some minerals contain more francium than others and also considers that some elements may be lost through erosion or recycling of other materials.
The most abundant isotope of francium is francium-157. It makes up about 1% of the total mass of the Earth's crust. The next most common isotope is francium-155 which accounts for about 95% of the francium found in nature.
Earth's crust contains about 5 x 1021 atoms of uranium. Based on this number, it can be estimated that there is approximately 0.000005 g of francium per atom of uranium. This implies that the total mass of francium in the Earth's crust is 5 x 1020 g or 5 × 1022 atoms.
The concentration of francium in the Earth's crust increases slightly with depth. It was thought that the concentration increased rapidly until about 100 meters below ground level when it began to decrease again. Recent studies have shown that this pattern is not universal across all regions of the world.
It is created both naturally and artificially. The earth's crust most likely contains between 340 and 550 gms of this metal francium. Francium is formed as a result of the disintegration of alpha particles present in uranium crystals. It can also be produced by bombarding calcium atoms with electrons.
Francium was first discovered in 1937 by American scientists who were studying samples of uranium ore that had been brought back from the Italian island of Marteinotto. They found that the ore contained more than expected amounts of argon and krypton. In addition, it also contained something much rarer -- an element with an atomic number of 90 and mass less than 2u. This new element was later named after Frania Smith, the daughter of one of the researchers who helped discover it.
Since its discovery, another element has been added to the periodic table: francium. It has the same number of electrons as radon but unlike radon it cannot be dissolved in water because it is very reactive. Instead, it tends to form compounds with other elements such as fluorine or arsenic.
The only source of francium is uranium minerals. However, since it is so rare it can't be extracted like other metals. One method currently being tested for extracting francium is electrodeposition. This process involves putting a mixture of chemicals into a cell and applying electricity to it.