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Bakerite

Big Photo

Rio Gavottino, Casarza Ligure, Genova Province, Liguria, Italy
© R. Bracco

Show Bakerite Photos (3)
Formula:
Ca
 
4
B
 
4
[(OH)
 
4
|HBO
 
4
|(SiO
 
4
)
 
3
]
System:MonoclinicColour:White
Hardness:4½
Name:After R.C. Baker, discoverer of the species.


Gadolinite-Datolite Group.

Classification of Bakerite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/B.29-20
Nickel-Strunz 10th (pending) edition ID:9.AJ.20

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
Dana 8th edition ID:54.2.1b.1

54 : NESOSILICATES Borosilicates and Some Beryllosilicates
2 : Borosilicates and Some Beryllosilicates with B in [4] coordination
Hey's CIM Ref.:17.5.13

17 : Silicates Containing other Anions
5 : Borosilicates
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Type Occurrence of Bakerite

Type Locality:Corkscrew mine, Corkscrew Canyon, Furnace Creek District, Death Valley, Inyo Co., California, USA
Year of Discovery:1903
Associated Minerals at type locality:
Howlite

Physical Properties of Bakerite

Lustre:Dull
Colour:White
Hardness (Mohs):4½
Density (measured):2.88 g/cm3

Crystallography of Bakerite

Crystal System:Monoclinic
Cell Parameters:a = 4.85Å, b = 7.627Å, c = 9.659Å
β = 90.255°
Ratio:a:b:c = 0.636 : 1 : 1.266
Unit Cell Volume:V 357.29 ų (Calculated from Unit Cell)
Morphology:Dense and microcrystalline, resembling unglazed porcelain. Nodules and veins.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Bakerite

Type:Biaxial (-)
RI values: nα = 1.624 nβ = 1.635 nγ = 1.654
Birefringence:Moderate
Maximum Birefringence:δ = 0.030

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:weak

Chemical Properties of Bakerite

Formula:
Ca
 
4
B
 
4
[(OH)
 
4
|HBO
 
4
|(SiO
 
4
)
 
3
]
Essential elements:B, Ca, H, O, Si
All elements listed in formula:B, Ca, H, O, Si

Relationship of Bakerite to other Species

Related to:
  • Gadolinite-Datolite Group
    • Related Minerals - Nickel-Strunz Grouping):
    9.AJ.05Grandidierite
    (Mg,Fe
    2+
     
    		)(Al,Fe
    3+
     
    		)
     
    3
    		[O
     
    2
    		|BO
     
    3
    		|SiO
     
    4
    		]
    9.AJ.05Ominelite
    (Fe
    2+
     
    		,Mg)(Al,Fe
    3+
     
    		)
     
    3
    		[O
     
    2
    		|BO
     
    3
    		|SiO
     
    4
    		]
    9.AJ.10Dumortierite
    (Al,Fe
    3+
     
    		)
     
    7
    		[O
     
    3
    		|BO
     
    3
    		|(SiO
     
    4
    		)
     
    3
    		]
    9.AJ.10Holtite
    (Ta,Sb)Al
     
    6
    		[O
     
    3
    		|BO
     
    3
    		|(SiO
     
    4
    		)
     
    3
    		]
    9.AJ.10Magnesiodumortierite
    (Mg,Ti,[](Al,Mg)
     
    2
    		Al
     
    4
    		Si
     
    3
    		O
     
    18-y
    		(OH)
     
    y
    		B y = 2-3
    9.AJ.15Garrelsite
    Ba
     
    3
    		NaSi
     
    2
    		B
     
    7
    		O
     
    16
    		(OH)
     
    4
    9.AJ.20Datolite
    CaB[OH|SiO
     
    4
    		]
    9.AJ.20Gadolinite-(Ce)
    (Ce,La,Nd,Y)
     
    2
    		Fe
    2+
     
    		Be
     
    2
    		[O|SiO
     
    4
    		]
     
    2
    9.AJ.20Gadolinite-(Y)
    Y
     
    2
    		Fe
    2+
     
    		Be
     
    2
    		[O|SiO
     
    4
    		]
     
    2
    9.AJ.20Hingganite-(Ce)
    Ce
     
    2
    		□Be
     
    2
    		Si
     
    2
    		O
     
    8
    		(OH)
     
    2
    9.AJ.20Hingganite-(Y)
    (Y,Yb,Er)Be[OH|SiO
     
    4
    		]
    9.AJ.20Hingganite-(Yb)
    (Yb,Y)Be[OH|SiO
     
    4
    		]
    9.AJ.20Homilite
    Ca
     
    2
    		(Fe
    2+
     
    		,Mg)B
     
    2
    		[O|SiO
     
    4
    		]
     
    2
    9.AJ.20Melanocerite-(Ce)
    (Ce,Ca)
     
    5
    		(Si,B)
     
    3
    		O
     
    12
    		(OH,F)·nH
     
    2
    		O
    9.AJ.20Minasgeraisite-(Y)
    Y
     
    2
    		CaBe
     
    2
    		[O|SiO
     
    4
    		]
     
    2
    9.AJ.20Calcybeborosilite-(Y)
    (Y,Ca)
     
    2
    		(B,Be)
     
    2
    		[SiO
     
    4
    		]
     
    2
    		(OH,O)
     
    2
    9.AJ.25Stillwellite-(Ce)
    (Ce,La,Ca)BSiO
     
    5
    9.AJ.30Cappelenite-(Y)
    Ba(Y,Ce)
     
    6
    		Si
     
    3
    		B
     
    6
    		O
     
    24
    		F
     
    2
    9.AJ.35Okanoganite-(Y)
    (Na,Ca)
     
    3
    		(Y,Ce)
     
    12
    		Si
     
    6
    		B
     
    2
    		O
     
    27
    		F
     
    14
    9.AJ.35Vicanite-(Ce)
    (Ca,Ce,La,Th)
     
    15
    		As
    5+
     
    		(As
    3+
    0.5
    		,Na
     
    0.5
    		)Fe
    3+
     
    		Si
     
    6
    		B
     
    4
    		O
     
    40
    		F
     
    7
    9.AJ.35Hundholmenite-(Y)
    (Y,REE,Ca,Na)
     
    15
    		(Al,Fe
    3+
     
    		)(Ca
     
    x
    		As
    3+
    1-x
    		)(Si,As
    5+
     
    		)Si
     
    6
    		B
     
    3
    		(O,F)
     
    48
    9.AJ.40Jadarite
    LiNaSiB
     
    3
    		O
     
    7
    		(OH)
    Related Minerals - Hey's Index Grouping:
    17.5.1Manandonite
    LiAl
     
    4
    		Si
     
    3
    		BO
     
    10
    		(OH)
     
    6
    17.5.2Reedmergnerite
    Na[BSi
     
    3
    		O
     
    8
    		]
    17.5.3Searlesite
    NaBSi
     
    2
    		O
     
    5
    		(OH)
     
    2
    17.5.4Olenite
    ([ ],Na)[(Al,Li)
     
    3
    		][Al
     
    6
    		][(O,OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    17.5.5Elbaite
    [Na][(Li,Al)
     
    3
    		][Al
     
    6
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    17.5.6Kalborsite
    K
     
    6
    		[Cl|B(OH)
     
    4
    		|Al
     
    4
    		Si
     
    6
    		O
     
    20
    		]
    17.5.7Boromuscovite
    KAl
     
    2
    		[(OH)
     
    2
    		|BSi
     
    3
    		O
     
    10
    		]
    17.5.8Poudretteite
    KNa
     
    2
    		B
     
    3
    		Si
     
    12
    		O
     
    30
    17.5.9Liddicoatite
    [Ca][Li
     
    2
    		Al][Al
     
    6
    		][(OH)
     
    3
    		|F|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    17.5.10Datolite
    CaB[OH|SiO
     
    4
    		]
    17.5.11Danburite
    Ca[BSiO
     
    4
    		]
     
    2
    17.5.12Howlite
    Ca
     
    2
    		B
     
    5
    		SiO
     
    9
    		(OH)
     
    5
    17.5.14Oyelite
    Ca
     
    10
    		Si
     
    8
    		B
     
    2
    		O
     
    29
    		·12.5H
     
    2
    		O
    17.5.15Kornerupine
    Mg
     
    3
    		Al
     
    6
    		(Si,Al,B)
     
    5
    		O
     
    21
    		(OH)
    17.5.16Harkerite
    Ca
     
    24
    		Mg
     
    8
    		Al
     
    2
    		Si
     
    8
    		(O,OH)
     
    32
    		(BO
     
    3
    		)
     
    8
    		(CO
     
    3
    		)
     
    8
    		(H
     
    2
    		O,Cl)
    17.5.17Serendibite
    (Ca,Na)
     
    2
    		(Mg,Fe
    2+
     
    		)
     
    3
    		(Al,Fe
    3+
     
    		)
     
    3
    		[O
     
    2
    		|(Si,Al,B)
     
    6
    		O
     
    18
    		]
    17.5.18Stillwellite-(Ce)
    (Ce,La,Ca)BSiO
     
    5
    17.5.19Tadzhikite-(Ce)
    (Ca,Ce)
     
    4
    		(Ca,Y)
     
    2
    		(Ti
    4+
     
    		,Fe
    3+
     
    		,Al)[B
     
    4
    		Si
     
    4
    		O
     
    22
    		(O,OH)
     
    6
    		](OH)
     
    2
    17.5.20Melanocerite-(Ce)
    (Ce,Ca)
     
    5
    		(Si,B)
     
    3
    		O
     
    12
    		(OH,F)·nH
     
    2
    		O
    17.5.21Okanoganite-(Y)
    (Na,Ca)
     
    3
    		(Y,Ce)
     
    12
    		Si
     
    6
    		B
     
    2
    		O
     
    27
    		F
     
    14
    17.5.22Tritomite-(Ce)
    (Ce,La,Y,Th)
     
    5
    		(Si,B)
     
    3
    		(O,OH,F)
     
    13
    17.5.23Tritomite-(Y)
    (Y,Ca,La,Fe)
     
    5
    		(Si,B,Al)
     
    3
    		(O,OH,F)
     
    13
    17.5.24Cappelenite-(Y)
    Ba(Y,Ce)
     
    6
    		Si
     
    3
    		B
     
    6
    		O
     
    24
    		F
     
    2
    17.5.25Dumortierite
    (Al,Fe
    3+
     
    		)
     
    7
    		[O
     
    3
    		|BO
     
    3
    		|(SiO
     
    4
    		)
     
    3
    		]
    17.5.26Holtite
    (Ta,Sb)Al
     
    6
    		[O
     
    3
    		|BO
     
    3
    		|(SiO
     
    4
    		)
     
    3
    		]
    17.5.27Dravite
    [Na][Mg
     
    3
    		][Al
     
    6
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    17.5.28 Ferridravite
    17.5.29Axinite-(Mg)
    Ca
     
    2
    		MgAl
     
    2
    		[OH|BSi
     
    4
    		O
     
    15
    		]
    17.5.30Uvite
    [Ca][(Mg,Fe
    2+
     
    		)
     
    3
    		][MgAl
     
    5
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    17.5.31Garrelsite
    Ba
     
    3
    		NaSi
     
    2
    		B
     
    7
    		O
     
    16
    		(OH)
     
    4
    17.5.32Tienshanite
    Na
     
    2
    		BaMnTiB
     
    2
    		Si
     
    6
    		O
     
    20
    17.5.33Leucosphenite
    BaNa
     
    4
    		Ti
     
    2
    		B
     
    2
    		Si
     
    10
    		O
     
    30
    17.5.34Taramellite
    Ba
     
    4
    		(Fe
    3+
     
    		,Ti,Fe
    2+
     
    		,Mg)
     
    4
    		(B
     
    2
    		Si
     
    8
    		O
     
    27
    		)O
     
    2
    		Cl
     
    x
    17.5.35Titantaramellite
    Ba
     
    4
    		(Ti,Fe
    3+
     
    		,Fe
    2+
     
    		,Mg)
     
    4
    		(B
     
    2
    		Si
     
    8
    		O
     
    27
    		)O
     
    2
    		Cl
     
    x
    17.5.36Nagashimalite
    Ba
     
    4
    		(V,Ti)
     
    4
    		B
     
    2
    		Si
     
    8
    		O
     
    27
    		(O,OH)
     
    2
    		Cl
    17.5.37Chromdravite
    [Na][Mg
     
    3
    		][(Cr
    3+
     
    		,Fe
    3+
     
    		)
     
    6
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    17.5.38Wawayandaite
    Ca
     
    6
    		Mn
     
    2
    		BBe
     
    9
    		Si
     
    6
    		O
     
    23
    		(OH,Cl)
     
    15
    17.5.39Werdingite
    (Mg,Fe)
     
    2
    		Al
     
    14
    		Si
     
    4
    		B
     
    4
    		O
     
    37
    17.5.40Axinite-(Mn)
    Ca
     
    2
    		Mn
    2+
     
    		Al
     
    2
    		[OH|BSi
     
    4
    		O
     
    15
    		]
    17.5.41Axinite
    (Ca,Fe,Mn)Al
     
    2
    		BSi
     
    4
    		O
     
    15
    		OH
    17.5.42Tinzenite
    (Ca,Mn
    2+
     
    		,Fe
    2+
     
    		)
     
    3
    		Al
     
    2
    		[OH|BSi
     
    4
    		O
     
    15
    		]
    17.5.44Schorl
    [Na][Fe
    2+
    3
    		][Al
     
    6
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    17.5.45Buergerite
    [Na][Fe
    3+
    3
    		][Al
     
    6
    		][O
     
    3
    		|F|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    17.5.46Feruvite
    [Ca][(Fe
    2+
     
    		 ,Mg)
     
    3
    		][MgAl
     
    5
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    17.5.47Axinite-(Fe)
    Ca
     
    2
    		Fe
    2+
     
    		Al
     
    2
    		[OH|BSi
     
    4
    		O
     
    15
    		]
    17.5.48Homilite
    Ca
     
    2
    		(Fe
    2+
     
    		,Mg)B
     
    2
    		[O|SiO
     
    4
    		]
     
    2
    17.5.49Grandidierite
    (Mg,Fe
    2+
     
    		)(Al,Fe
    3+
     
    		)
     
    3
    		[O
     
    2
    		|BO
     
    3
    		|SiO
     
    4
    		]
    17.5.50Hyalotekite
    (Ba,Pb,Ca,K)
     
    6
    		(B,Si,Al)
     
    2
    		(Si,Be)
     
    10
    		O
     
    28
    		(F,Cl)
    17.5.51Hellandite-(Y)
    (Ca,Y)
     
    6
    		(Al,Fe
    3+
     
    		)Si
     
    4
    		B
     
    4
    		O
     
    20
    		(OH)
     
    4

    Other Names for Bakerite

    German names:
    Bakerit
    Russian names:
    Бакерит
    Spanish names:
    Bakerita

    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 Bakerite

    Reference List:Giles, W.B. (1903), Bakerite (a new borosilicate of calcium) and howlite from California, Mineralogical Magazine: 13: 353-355.

    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 363.

    Kramer, H.C. & R.D. Allen (1956), A restudy of bakerite, priceite, and veatchite, American Mineralogist: 41: 689-700.

    Murdoch, Joseph (1962), Bakerite crystals: American Mineralogist: 47: 919-923.

    Pemberton, H. Earl (1971a) Type locality for bakerite. American Mineralogist: 56: 1109-1110.

    Perchiazzi, N., Gualtieri, A.F., Merlino, S., Kampf, A.R. (2004): The atomic structure of bakerite and its relationship to datolite. The American Mineralogist, 89, 767-776.

    Internet Links for Bakerite

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

    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.
    Canada
     
    • Ontario
      • Haliburton Co.
        • Monmouth Township
    		Am Min 89:5-6 pp 767-776
    Italy
     
    • Liguria
      • Genova Province
        • Casarza Ligure
        • Ne
          • Graveglia Valley
            • Reppia
    		MinRec 32:360
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi
            • Bitchu-cho (Bicchu-cho)
    		Mineralogical Record: 27: 303.
    Mexico
     
    • San Luis Potosí
      • Mun. de Charcas
        • Charcas
    		Panczner (1987).
    Panczner (1987): 108.
    Panczner (1987): 108.
    New Zealand
     
    • North Island
      • Wairarapa
    		Railton, G.L. & Watters, W.A., Minerals of New Zealand, New Zealand Geological Survey Bull. #104 (1990).
    Turkey
     
    • Central Anatolia Region
      • Sivas Province
    		Am Min 89:5-6 pp 767-776
    • Marmara Region
      • Balikesir Province
        • Faras
          • Sultancayin
    		CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27
    USA
     
    • California
      • Inyo Co.
        • Death Valley
    		Am Min 89:5-6 pp 767-776
          • Furnace Creek District
            • Corkscrew Canyon
    		www.mineralsocal.org
      • Los Angeles Co.
        • Lang
          • Tick Canyon
    		www.mineralsocal.org
    Harvard Museum of Natural History specimen no. 127118
        • Calico Mts
          • Calico District
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 363.
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Dunn(1995):Pt3:363.
    Mineral and/or Locality
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    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mineral Specimens available here.