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Johnbaumite

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Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA
© 2008, J. Weissman

Show Johnbaumite Photos (2)
Formula:
Ca
 
5
[OH|(AsO
 
4
)
 
3
]
System:HexagonalHardness:4½
Name:After Mr. John Leach Baum, Hamburg, NJ, 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
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Type Occurrence of Johnbaumite

Type Locality:Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Year of Discovery:1980

Physical Properties of Johnbaumite

Hardness (Mohs):4½

Crystallography of Johnbaumite

Crystal System:Hexagonal
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)

Optical Data of Johnbaumite

Type:Uniaxial (-)
RI values: nω = 1.687 nε = 1.684
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

Chemical Properties of Johnbaumite

Formula:
Ca
 
5
[OH|(AsO
 
4
)
 
3
]
Essential elements:As, Ca, H, O
All elements listed in formula:As, Ca, H, O

Relationship of Johnbaumite to other Species

Related to:
  • Apatite Supergroup
    • Related Minerals - Nickel-Strunz Grouping):

    - +
    8.BN.05Alforsite
    Ba
     
    5
    		[Cl|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Belovite-(Ce)
    NaSr
     
    3
    		(Ce,La)[(F,OH)|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Carbonate-rich Apatite-(CaF)
    Ca
     
    5
    		[(F,O)|(PO
     
    4
    		,CO
     
    3
    		)
     
    3
    		]
    8.BN.05Carbonate-rich Apatite-(CaOH)
    Ca
     
    5
    		[(OH,O)|(PO
     
    4
    		,CO
     
    3
    		)
     
    3
    		]
    8.BN.05Apatite-(CaCl)
    Ca
     
    5
    		[Cl|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Clinomimetite
    Pb
     
    5
    		[Cl|(AsO
     
    4
    		)
     
    3
    		]
    8.BN.05Fermorite
    (Ca,Sr)
     
    5
    		(AsO
     
    4
    		,PO
     
    4
    		)
     
    3
    		(OH)
    8.BN.05Apatite-(CaF)
    Ca
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Hedyphane
    Pb
     
    3
    		Ca
     
    2
    		[Cl|(AsO
     
    4
    		)
     
    3
    		]
    8.BN.05Apatite-(CaOH)
    Ca
     
    5
    		[OH|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Mimetite
    Pb
     
    5
    		[Cl|(AsO
     
    4
    		)
     
    3
    		]
    8.BN.05Morelandite
    (Ba,Ca,Pb)
     
    5
    		[Cl|(AsO
     
    4
    		,PO
     
    4
    		)
     
    3
    		]
    8.BN.05Pyromorphite
    Pb
     
    5
    		[Cl|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Apatite-(SrOH)
    (Sr,Ca)
     
    5
    		(PO
     
    4
    		)
     
    3
    		(OH,F)
    8.BN.05Svabite
    Ca
     
    5
    		[(F,Cl,OH)|(AsO
     
    4
    		)
     
    3
    		]
    8.BN.05Turneaureite
    Ca
     
    5
    		[Cl|(AsO
     
    4
    		,PO
     
    4
    		)
     
    3
    		]
    8.BN.05Vanadinite
    Pb
     
    5
    		[Cl|(VO
     
    4
    		)
     
    3
    		]
    8.BN.05Belovite-(La)
    NaSr
     
    3
    		(La,Ce)[(F,OH)|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Deloneite-(Ce)
    NaCa
     
    2
    		SrCe(PO
     
    4
    		)
     
    3
    		F
    8.BN.05Fluorcaphite
    (Ca,Sr,Ce,Na)
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Kuannersuite-(Ce)
    NaBa
     
    3
    		(Ce,Nd,La)[(F,Cl)|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05Apatite-(CaOH)-M
    (Ca,Na)
     
    3
    		Ca
     
    2
    		[(OH,Cl)|(PO
     
    4
    		,SO
     
    4
    		)
     
    3
    		]
    8.BN.05Phosphohedyphane
    Pb
     
    3
    		Ca
     
    2
    		[Cl|(PO
     
    4
    		)
     
    3
    		]
    8.BN.05IMA2008-009
    Sr
     
    5
    		(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
    		[OH|AsO
     
    4
    		] · 4H
     
    2
    		O
    20.2.2Brassite
    MgHAsO
     
    4
    		·4H
     
    2
    		O
    20.2.3Rösslerite
    MgHAsO
     
    4
    		·7H
     
    2
    		O
    20.2.4Hörnesite
    Mg
     
    3
    		(AsO
     
    4
    		)
     
    2
    		·8H
     
    2
    		O
    20.2.5Weilite
    CaHAsO
     
    4
    20.2.7Haidingerite
    Ca[HAsO
     
    4
    		] · H
     
    2
    		O
    20.2.8Pharmacolite
    CaHAsO
     
    4
    		·2H
     
    2
    		O
    20.2.9Sainfeldite
    Ca
     
    5
    		H
     
    2
    		(AsO
     
    4
    		)
     
    4
    		·4H
     
    2
    		O
    20.2.10Vladimirite
    Ca
     
    5
    		[(HAsO
     
    4
    		)
     
    2
    		|(AsO
     
    4
    		)
     
    2
    		] · 5H
     
    2
    		O
    20.2.11Guérinite
    Ca
     
    5
    		[(HAsO
     
    4
    		)
     
    2
    		|(AsO
     
    4
    		)
     
    2
    		] · 9H
     
    2
    		O
    20.2.12Ferrarisite
    Ca
     
    5
    		[(HAsO
     
    4
    		)
     
    2
    		|(AsO
     
    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
    		[(HAsO
     
    4
    		)
     
    4
    		|AsO
     
    4
    		] · 4H
     
    2
    		O
    20.2.16Bergslagite
    CaBe[OH|AsO
     
    4
    		]
    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[(HAsO
     
    4
    		)
     
    2
    		|(AsO
     
    4
    		)
     
    2
    		] · 4H
     
    2
    		O
    20.2.20Camgasite
    CaMg[OH|AsO
     
    4
    		] · 5H
     
    2
    		O
    20.2.21Picropharmacolite
    Ca
     
    4
    		Mg[(HAsO
     
    4
    		)
     
    2
    		|(AsO
     
    4
    		)
     
    2
    		] · 11H
     
    2
    		O
    20.2.22Bariopharmacosiderite
    BaFe
    3+
    4
    		[(OH)
     
    5
    		|(AsO
     
    4
    		)
     
    3
    		] · 5H
     
    2
    		O

    Other Names for Johnbaumite

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

    Other Information

    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.

    Articles/Blogs about Johnbaumite

    Internet Links for Johnbaumite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Johnbaumite in the Natural History Museum (London) online catalogue
  • Johnbaumite details from Handbook of Mineralogy (PDF)
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    Localities for Johnbaumite

    Hide Locality List
    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.
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    (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
            • Bitchu-cho (Bicchu-cho)
    		American Mineralogist (1999): 84:991.
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Buriatia (Buryatia) Republic
          • Vitim Plateau
    		P.M. Kartashov data
    Sweden
     
    • Värmland
      • Filipstad
        • Nordmark
    		No reference listed
    Mineralogical Magazine (1998) 62 (3), 395-407
    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
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