Nobleite is a rare

borate A borate is any of several boron oxyanions, negative ions consisting of boron and oxygen, such as orthoborate , metaborate , or tetraborate ; or any salt with such anions, such as sodium metaborate, and disodium tetraborate . The name also refe ...

mineral with the chemical formula CaB₆O₉(OH)₂·3H₂O. It was discovered in 1961, in

Death Valley Death Valley is a desert valley in Eastern California, in the northern Mojave Desert, bordering the Great Basin Desert. During summer, it is the Highest temperature recorded on Earth, hottest place on Earth. Death Valley's Badwater Basin is the ...

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

, and is named for

Levi F. Noble Levi Fatzinger Noble (November 11, 1882 – August 4, 1965) was an American geologist. His entire career was spent as a member of the United States Geological Survey (USGS). Noble is largely known for his work in the American southwest, particular ...

, a

USGS The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, a ...

geologist, in honor of his contributions to the geology of the Death Valley region. Nobleite has also been identified at two localities in

Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...

and

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

References

Webmineral
Phylloborates Monoclinic minerals Minerals in space group 14 {{mineral-stub