Bakerite is the common name given to hydrated calcium boro-silicate hydroxide, a

borosilicate Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10−6 K−1 at 20 °C), ma ...

mineral (chemical formula Ca₄B₄(BO₄)(SiO₄)₃(OH)₃·(H₂O)) that occurs in

volcanic rock Volcanic rock (often shortened to volcanics in scientific contexts) is a rock formed from lava erupted from a volcano. In other words, it differs from other igneous rock by being of volcanic origin. Like all rock types, the concept of volcanic ...

s in the

Baker, California Baker is a census-designated place located in San Bernardino County, California, US. As of the 2010 census, the CDP had a total population of 735. Baker's ZIP Code is 92309 and the community is within area codes 442 and 760. History Baker wa ...

area. Discredited mineral: IMA2016-A. It was first described in 1903 for an occurrence in the Corkscrew Canyon Mine of the Black Mountains, Furnace Creek District, Death Valley National Park,

Inyo County, California Inyo County () is a county in the eastern central part of the U.S. state of California, located between the Sierra Nevada and the state of Nevada. In the 2020 census, the population was 19,016. The county seat is Independence. Inyo County is ...

, US.Mindat.org
/ref> It was named for Richard C. Baker, a director of the

Pacific Coast Borax Company The Pacific Coast Borax Company (PCB) was a United States mining company founded in 1890 by the American borax magnate Francis Smith, the "Borax King". History The roots of the Pacific Coast Borax Company lie in Mineral County, Nevada, east of ...

.Handbook of Mineralogy
/ref>Hildebrand, GH. (1982) Borax Pioneer: Francis Marion Smith. San Diego: Howell-North Books. p. 89. ()

References

Borate minerals Nesosilicates Monoclinic minerals Minerals in space group 14 Borosilicates {{silicate-mineral-stub