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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
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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,
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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,
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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,
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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.
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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:
479:
Pete J. Dunn, Donald R. Peacor, Nancy
Newberry; Johnbaumite, a new member of the apatite group from Franklin, New Jersey. American Mineralogist 1980;; 65 (11–12): 1143–1145. doi:
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Anhedral grains, granular minerals without the expression of crystal shapes and massive, uniformly indistinguishable crystals forming large masses.
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Adamantine to greasy on fracture surfaces, vitreous on cleavage surfaces
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314:. It was first described in 1980, where it appeared in
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326:. Johnbaumite was discovered at Harstigen mine in
535:Franklin Township, Somerset County, New Jersey
330:in the 19th century, but it was described as
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490:https://doi.org/10.2138/am.2013.4443
383:"IMA–CNMNC approved mineral symbols"
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550:Minerals in space group 176
146:Greyish white to colourless
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345:Franklin Mineral Museum
387:Mineralogical Magazine
257:nω = 1.687 nε = 1.684
83:Strunz classification
408:10.1180/mgm.2021.43
399:2021MinM...85..291W
381:Warr, L.N. (2021).
93:Dana classification
545:Hexagonal minerals
244:Optical properties
530:Arsenate minerals
316:Franklin Township
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117:Dipyramidal (8/m)
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540:Calcium minerals
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253:Refractive index
239:3.65 – 3.73 g/cm
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176:Irregular/Uneven
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51:(repeating unit)
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499:Further reading
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320:Somerset County
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166:Distinct {1010}
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393:(3): 291–320.
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357:Hydroxyapatite
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277:Non-pleochroic
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138:Identification
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103:Crystal system
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456:"Johnbaumite"
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431:"Johnbaumite"
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263:Birefringence
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152:Crystal habit
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41:Apatite group
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463:. Retrieved
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438:. Retrieved
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247:Uniaxial (−)
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299:Johnbaumite
273:Pleochroism
229:Transparent
225:Diaphaneity
123:Space group
97:41.08.03.03
19:Johnbaumite
524:Categories
460:Mindat.org
368:References
324:New Jersey
290:References
282:Extinction
192:Mohs scale
73:IMA symbol
505:1981–1986
417:235729616
338:Etymology
309:hydroxide
107:Hexagonal
351:See also
306:arsenate
285:Parallel
195:hardness
182:Tenacity
172:Fracture
162:Cleavage
87:08.BN.05
38:Category
509:666–675
465:17 June
440:17 June
395:Bibcode
362:Svabite
332:svabite
312:mineral
303:calcium
235:Density
186:Brittle
47:Formula
33:General
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328:Sweden
215:Streak
205:Luster
143:Colour
413:S2CID
301:is a
267:0.003
219:White
199:≈ 4.5
467:2022
442:2022
59:(AsO
513:1–7
403:doi
77:Jbm
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322:,
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133:/m
128:P6
67:OH
55:Ca
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131:3
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61:4
57:5
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