Mindat Logo

Johnbaumite

This page is currently not sponsored. Click here to sponsor this page.



Formula:
Ca
 
5
(AsO
 
4
)
 
3
OH
System:HexagonalColour:Light grayish white
Hardness:
Member of:Apatite Group > Apatite Supergroup
Name:
Named by Pete Dunn, Donald Peacor, and N. Newberry in 1980 in honor of Mr. John Leach Baum [March 15, 1916 New York, New York, USA - October 16, 2011 Hamburg, New Jersey, USA], graduate of Harvard University and student under Dr. Charles Palache. He was the former Head Geologist, Franklin Mine, Curator Emeritus of the Franklin Mineral Museum, author and contributor to the mineralogy and geology of the Franklin deposit.


Apatite Group. The arsenate analogue of Hydroxylapatite.

Classification of Johnbaumite

IMA status:Approved 1980
Strunz 8th edition ID:7/B.39-80
Nickel-Strunz 10th (pending) edition ID:8.BN.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
N : With only large cations, (OH, etc.):RO4 = 0.33:1
Dana 8th edition ID:41.8.3.3

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
8 : A5(XO4)3Zq
Hey's CIM Ref.:20.2.6

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
mindat.org URL:http://www.mindat.org/min-2105.html
Please feel free to link to this page.

Type Occurrence of Johnbaumite

Type Locality:Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
General Appearance of Type Material:Grayish white masses
Year of Discovery:1980
Geological Setting of type material:Metamorphic zinc-bearing skarn
Associated Minerals at type locality:
ZinciteYeatmaniteRoméite GroupFrankliniteDiopside
CopperCalciteAndradite

Occurrences of Johnbaumite

Geological Setting:Skarn

Physical Properties of Johnbaumite

Lustre:Sub-Vitreous, Resinous, Waxy, Greasy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Light grayish white
Streak:White
Hardness (Mohs):
Tenacity:Brittle
Cleavage:Distinct/Good
{10-10}
Fracture:Irregular/Uneven
Density (measured):3.68 g/cm3
Density (calculated):3.73 g/cm3

Crystallography of Johnbaumite

Crystal System:Hexagonal
Class (H-M):6/m - Dipyramidal
Space Group:P63/m
Space Group Setting:P63/m
Cell Parameters:a = 9.7Å, c = 6.93Å
Ratio:a:c = 1 : 0.714
Unit Cell Volume:V 564.69 ų (Calculated from Unit Cell)
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
3.98 (50)
3.47 (50)
2.90 (100)
2.82 (70)
2.80 (70)
2.68 (50)
2.03 (40)
1.879 (40)
Comments:ICDD 33-265

Optical Data of Johnbaumite

Type:Uniaxial (-)
RI values: nω = 1.687 nε = 1.684
Birefringence:0.003
Maximum Birefringence:δ = 0.003

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Optical Extinction:Parallel
Pleochroism:Non-pleochroic

Chemical Properties of Johnbaumite

Formula:
Ca
 
5
(AsO
 
4
)
 
3
OH
Simplified for copy/paste:Ca5(AsO4)3OH
Essential elements:As, Ca, H, O
All elements listed in formula:As, Ca, H, O

Relationship of Johnbaumite to other Species

Member of:Apatite Group > Apatite Supergroup
Other Members of Group:

- +
Alforsite
Ba
 
5
(PO
 
4
)
 
3
Cl
Bellite
Pb
 
5
(AsO
 
4
,CrO
 
4
, SiO
 
2
)
 
3
Cl
Carbonate-rich Fluorapatite
Ca
 
5
(PO
 
4
,CO
 
3
)
 
3
(F,O)
Chlorapatite
Ca
 
5
(PO
 
4
)
 
3
Cl
Fluorapatite
Ca
 
5
(PO
 
4
)
 
3
F
Hydroxylapatite
Ca
 
5
(PO
 
4
)
 
3
(OH)
Hydroxylapatite-M
Ca
 
5
(PO
 
4
)
 
3
OH
Hydroxylpyromorphite
Pb
 
5
(PO
 
4
)
 
3
(OH)
Johnbaumite-M
Ca
 
5
(AsO
 
4
)
 
3
OH
Mimetite
Pb
 
5
(AsO
 
4
)
 
3
Cl
Mimetite-2M
Mimetite-M
Pb
 
5
(AsO
 
4
)
 
3
Cl
Miyahisaite
(Sr,Ca)
 
2
Ba
 
3
(PO
 
4
)
 
3
F
Oxypyromorphite
Pb
 
10
(PO
 
4
)
 
6
O
Pieczkaite
Mn
 
5
(PO
 
4
)
 
3
Cl
Pyromorphite
Pb
 
5
(PO
 
4
)
 
3
Cl
Stronadelphite
Sr
 
5
(PO
 
4
)
 
3
F
Svabite
Ca
 
5
(AsO
 
4
)
 
3
F
Turneaureite
Ca
 
5
(AsO
 
4
)
 
3
Cl
Unnamed (F-analogue of Pyromorphite)
Pb
 
5
(PO
 
4
)
 
3
F
Unnamed (OH-analogue of Mimetite)
Pb
 
5
(AsO
 
4
)
 
3
(OH)
Vanadinite
Pb
 
5
(VO
 
4
)
 
3
Cl
Common Associates:
CalciteBiotite
Related Minerals - Nickel-Strunz Grouping):

- +
8.BN.05Alforsite
Ba
 
5
(PO
 
4
)
 
3
Cl
8.BN.05Belovite-(Ce)
NaCeSr
 
3
(PO
 
4
)
 
3
F
8.BN.05Carbonate-rich Fluorapatite
Ca
 
5
(PO
 
4
,CO
 
3
)
 
3
(F,O)
8.BN.05Carbonate-rich Hydroxylapatite
Ca
 
5
(PO
 
4
,CO
 
3
)
 
3
(OH,O)
8.BN.05Chlorapatite
Ca
 
5
(PO
 
4
)
 
3
Cl
8.BN.05Mimetite-M
Pb
 
5
(AsO
 
4
)
 
3
Cl
8.BN.05Johnbaumite-M
Ca
 
5
(AsO
 
4
)
 
3
OH
8.BN.05Fluorapatite
Ca
 
5
(PO
 
4
)
 
3
F
8.BN.05Hedyphane
Pb
 
3
Ca
 
2
(AsO
 
4
)
 
3
Cl
8.BN.05Hydroxylapatite
Ca
 
5
(PO
 
4
)
 
3
(OH)
8.BN.05Mimetite
Pb
 
5
(AsO
 
4
)
 
3
Cl
8.BN.05Morelandite
Ca
 
2
Ba
 
3
(AsO
 
4
)
 
3
Cl
8.BN.05Pyromorphite
Pb
 
5
(PO
 
4
)
 
3
Cl
8.BN.05Fluorstrophite
SrCaSr
 
3
(PO
 
4
)
 
3
F
8.BN.05Svabite
Ca
 
5
(AsO
 
4
)
 
3
F
8.BN.05Turneaureite
Ca
 
5
(AsO
 
4
)
 
3
Cl
8.BN.05Vanadinite
Pb
 
5
(VO
 
4
)
 
3
Cl
8.BN.05Belovite-(La)
NaLaSr
 
3
(PO
 
4
)
 
3
F
8.BN.05Deloneite
(Na
 
0.5
REE
 
0.25
Ca
 
0.25
)(Ca
 
0.75
REE
 
0.25
)Sr
 
1.5
(CaNa
 
0.25
REE
 
0.25
)(PO
 
4
)
 
3
F
 
0.5
(OH)
 
0.5
8.BN.05Fluorcaphite
SrCaCa
 
3
(PO
 
4
)
 
3
F
8.BN.05Kuannersuite-(Ce)
NaCeBa
 
3
(PO
 
4
)
 
3
F
 
0.5
Cl
 
0.5
8.BN.05Hydroxylapatite-M
Ca
 
5
(PO
 
4
)
 
3
OH
8.BN.05Phosphohedyphane
Ca
 
2
Pb
 
3
(PO
 
4
)
 
3
Cl
8.BN.05Stronadelphite
Sr
 
5
(PO
 
4
)
 
3
F
8.BN.05Fluorphosphohedyphane
Ca
 
2
Pb
 
3
(PO
 
4
)
 
3
F
8.BN.05Carlgieseckeite-(Nd)
NaNdCa
 
3
(PO
 
4
)
 
3
F
8.BN.05Miyahisaite
(Sr,Ca)
 
2
Ba
 
3
(PO
 
4
)
 
3
F
8.BN.10Arctite
Na
 
2
Ca
 
4
(PO
 
4
)
 
3
F
Related Minerals - Hey's Index Grouping:

- +
20.2.1Bearsite
Be
 
2
(AsO
 
4
)(OH) · 4H
 
2
O
20.2.2Brassite
Mg(HAsO
 
4
) · 4H
 
2
O
20.2.3Rösslerite
Mg(HAsO
 
4
) · 7H
 
2
O
20.2.4Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.2.5Weilite
Ca(HAsO
 
4
)
20.2.7Haidingerite
CaHAsO
 
4
· H
 
2
O
20.2.8Pharmacolite
Ca(HAsO
 
4
) · 2H
 
2
O
20.2.9Sainfeldite
CaCa
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 4H
 
2
O
20.2.10Vladimirite
Ca
 
4
(AsO
 
4
)
 
2
(AsO
 
3
OH) · 4H
 
2
O
20.2.11Guérinite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 9H
 
2
O
20.2.12Ferrarisite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 9H
 
2
O
20.2.13Rauenthalite
Ca
 
3
(AsO
 
4
)
 
2
· 10H
 
2
O
20.2.14Phaunouxite
Ca
 
3
(AsO
 
4
)
 
2
· 11H
 
2
O
20.2.15Mcnearite
NaCa
 
5
(AsO
 
4
)(HAsO
 
4
)
 
4
· 4H
 
2
O
20.2.16Bergslagite
CaBeAsO
 
4
(OH)
20.2.17Adelite
CaMg(AsO
 
4
)(OH)
20.2.18Talmessite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
20.2.19Irhtemite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 4H
 
2
O
20.2.20Camgasite
CaMg(AsO
 
4
)(OH) · 5H
 
2
O
20.2.21Picropharmacolite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 11H
 
2
O
20.2.22Bariopharmacosiderite
Ba
 
0.5
Fe
3+
4
(AsO
 
4
)
 
3
(OH)
 
4
· 5H
 
2
O

Other Names for Johnbaumite

Synonyms:
IMA1980-B
Other Languages:
German:Johnbaumit
Spanish:Johnbaumita

Other Information

Fluorescence in UV light:Pinkish orange in SW only
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Johnbaumite

Reference List:

- +
American Mineralogist (1980): 65: 1143-1145.

Young J. Lee, Peter W. Stephens, Yuanzhi Tang, Wei Li, Brian L. Phillips, John B. Parise, and Richard J. Reeder (2009): Arsenate substitution in hydroxylapatite: Structural characterization of the Ca5(PxAs1–xO4)3OH solid solution. American Mineralogist 94, 666-675.

Internet Links for Johnbaumite

Search Engines:
  • Look for Johnbaumite on Google
  • Look for Johnbaumite images on Google
  • External Links:
  • Look for Johnbaumite on Webmineral
  • Look for Johnbaumite on Athena Mineralogy
  • Look for Johnbaumite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Johnbaumite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Fine and rare minerals from mintreasure.com
  • Buy from David K Joyce minerals
  • The Arkenstone - Fine Minerals
  • Search for Johnbaumite on Well-Arranged Molecules
  • Fine minerals from bisbeeborn.com
  • Lapis Mineral Magazin
  • High-end worldwide specimens & outstanding customer service
  • Fabre Minerals - search for Johnbaumite specimens
  • Fine Minerals from Weinrich Minerals, Inc.
  • Buy minerals from YourMineralCollection
  • SpiriferMinerals.com - high quality low prices
  • Buy rare minerals from Excalibur Minerals
  • Localities for Johnbaumite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi City
            • Bicchu-cho (Bitchu-cho)
              • Fuka
    American Mineralogist (1999): 84:991.; Journal of Mineralogical and Petrological Sciences Vol. 99 (2004) , No. 2 April 67-71
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Buriatia Republic (Buryatia)
          • Vitim Plateau
    P.M. Kartashov data; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Sweden
     
    • Värmland
      • Filipstad
        • Nordmark (Nordmarksberg)
    No reference listed
    Mineralogical Magazine (1998) 62 (3), 395-407
        • Persberg district
          • Pajsberg
    Biagioni, C. & Pasero, M. (2013): The crystal structure of johnbaumite, Ca5(AsO4)3OH, the arsenate analogue of hydroxylapatite. American Mineralogist. 98, 1580–1584
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    Dunn, P.J., et al: Am.Min.:65:1143-1145 (1980); Dunn(1995):Pt5:651.
          • Ogdensburg
            • Sterling Hill
    Jenkins, R.E., II: (1994); Dunn(1995):Pt5:651.
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: September 18, 2014 21:36:35
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds