Johnbaumite is a
calcium arsenate hydroxide mineral. It was first described in 1980, where it appeared in
Franklin Township,
Somerset County,
New Jersey. Johnbaumite was discovered at Harstigen mine in
Sweden
Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...
in the 19th century, but it was described as
svabite
Svabite is a arsenate mineral. The mineral is rare and is also a member of the apatite group. It is isomorphous with apatite and mimetite.
It got its name in 1891 by Hjalmar Sjögren after Anton von Swab.
Occurrence
Svabite can be found in cou ...
.
[ Cristian Biagioni, Marco Pasero; The crystal structure of johnbaumite, Ca5(AsO4)3OH, the arsenate analogue of hydroxylapatite. American Mineralogist 2013;; 98 (8-9): 1580–1584. doi: https://doi.org/10.2138/am.2013.4443]
Etymology
It is named after geologist John Leach Baum (March 15, 1916 – October 16, 2011), who found the original specimen in 1944. He was a significant contributor to the geology and mineralogy of the Franklin deposit, and the Curator Emeritus at the
Franklin Mineral Museum The Franklin Mineral Museum in Franklin, New Jersey is a mineral, geology, and mining museum at the former Franklin Mine. It is located in Sussex County, New Jersey.
History
The mine was active from 1898 until the mid-1950s.
The mine site becam ...
.
See also
*
Hydroxyapatite
Hydroxyapatite, also called hydroxylapatite (HA), is a naturally occurring mineral form of calcium apatite with the formula Ca5(PO4)3(OH), but it is usually written Ca10(PO4)6(OH)2 to denote that the crystal unit cell comprises two entities. ...
*
Svabite
Svabite is a arsenate mineral. The mineral is rare and is also a member of the apatite group. It is isomorphous with apatite and mimetite.
It got its name in 1891 by Hjalmar Sjögren after Anton von Swab.
Occurrence
Svabite can be found in cou ...
References
{{Reflist
Further reading
* Biagioni C, Bosi F, Hålenius U, Pasero M (2017) The crystal structure of turneaureite, Ca5(AsO4)3Cl, the arsenate analog of chlorapatite, and its relationships with the arsenate apatites johnbaumite and svabite, American Mineralogist, 102, 1981-1986
* Lee Y J, Stephens P W, Tang Y, Li W, Phillips B L, Parise J B, Reeder R J (2009) Arsenate substitution in hydroxylapatite: Structural characterization of the Ca5(PxAs1-xO4)3OH solid solution, American Mineralogist, 94, 666-675
* Zheng Y, Gao T, Gong Y, Ma S, Yang M, Chen P (2015) Electronic, vibrational and thermodynamic properties of Ca10(AsO4)6(OH)2: first principles study, The European Physical Journal of Applied Physics, 72, 1-7
* Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America.
Arsenate minerals
Franklin Township, Somerset County, New Jersey
Calcium minerals
Hexagonal minerals
Minerals in space group 176