Bakerite Mineral Data

Bakerite Mineral Data +

General Bakerite Information

Chemical Formula:

Ca4B4(BO4)(SiO4)3(OH)3·(H2O)

Composition:

Molecular Weight = 623.65 gm

Calcium 25.71 % Ca 35.97 % CaO

Silicon 13.51 % Si 28.90 % SiO₂

Boron 8.67 % B 27.91 % B₂O₃

Hydrogen 0.81 % H 7.22 % H₂O

Oxygen 51.31 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₄B₄(BO₄)(SiO₄)₃(OH)₃·(H₂O)

Environment:

Occurs as irregular veins in altered volcanic rock (Baker Canyon, Death Valley, California, USA).

IMA Status:

Valid Species (Pre-IMA) 1903

Locality:

Corkscrew mine, Corkscrew Canyon, Death Valley, Inyo Co. California. Link to MinDat.org Location Data.

Name Origin:

For Richard C. Baker, of Nutfield, Surrey, England, Mining Director of the Pacific Coast Borax Co., who discovered the mineral.

Bakerite Image

Images:

Bakerite

Comments: Porcelain-like, massive bakerite.
Location: Twenty Mule Canyon, Death Valley, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bakerite Crystallography

Axial Ratios:

a:b:c =0.6358:1:1.2664

Cell Dimensions:

a = 4.85, b = 7.627, c = 9.659, Z = 1; beta = 90.255° V = 357.29 Den(Calc)= 2.90

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.11(1), 2.236(0.6), 2.85(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Perchiazzi N , Gualtieri A F , Merlino S , Kampf A R , American Mineralogist , 89 (2004) p.767-776, The atomic structure of bakerite and its relationship to datolite, Sample: Refinement of the conventional X-ray data for sample #92735

View Additional jPOWD Structure files for Bakerite
[1] [2] [3] [4]

Physical Properties of Bakerite

Color:

Colorless, White.

Density:

2.7 - 2.9, Average = 2.8

Diaphaniety:

Transparent

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Hardness:

4.5 - Between Fluorite and Apatite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Bakerite

Gladstone-Dale:

CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2199,KPDmeas= 0.2277,KC= 0.2202

Optical Data:

Biaxial (-), a=1.624, b=1.635, g=1.654, bire=0.0300

Calculated Properties of Bakerite

Electron Density:

r_electron=2.90 gm/cc
note: r_Bakerite=2.90 gm/cc.

Fermion Index

Fermion Index = 0.02415
Boson Index = 0.97585

Photoelectric:

PE_Bakerite= 3.78 barns/electron
U=PE_Bakerite x r_electron= 10.97 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bakerite is Not Radioactive

Bakerite Classification

Dana Class:

54.2.1b.1 (54)Nesosilicate Borosilicates and Some Beryllosilicates

(54.2)with B in [4] coordination

(54.2.1b)Datolite group (Homilite series)

54.2.1b.1 Bakerite Ca4B4(BO4)(SiO4)3(OH)3·(H2O) P 2₁/c 2/m

54.2.1b.2 Gadolinite-(Ce) (Ce,La,Nd,Y)2FeBe2Si2O10 P 2₁/c 2/m

54.2.1b.3 Gadolinite-(Y) Y2FeBe2Si2O10 P 2₁/a 2/m

54.2.1b.4 Calciogadolinite* CaREE(Fe)Be2Si2O10 P 2₁/a 2/m

54.2.1b.5 Homilite Ca2(Fe,Mg)B2Si2O10 P 2₁/a 2/m

54.2.1b.6 Minasgeraisite-(Y) CaY2Be2Si2O10 P 2₁/a 2/m

Strunz Class:

VIII/B.29-20 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, with beryllium and boron

VIII/B.29 - Datolite/Gadolinite group

VIII/B.29-10 Datolite CaBSiO4(OH) P 2₁/c 2/m

VIII/B.29-20 Bakerite Ca4B4(BO4)(SiO4)3(OH)3·(H2O) P 2₁/c 2/m

VIII/B.29-30 Homilite Ca2(Fe,Mg)B2Si2O10 P 2₁/a 2/m

VIII/B.29-35 Vistepite Mn4SnB2(SiO4)4(OH)2 P1 1

VIII/B.29-40 Minasgeraisite-(Y) CaY2Be2Si2O10 P 2₁/a 2/m

VIII/B.29-50 Gadolinite-(Y) Y2FeBe2Si2O10 P 2₁/a 2/m

VIII/B.29-60 Gadolinite-(Ce) (Ce,La,Nd,Y)2FeBe2Si2O10 P 2₁/c 2/m

VIII/B.29-70 Hingganite-(Y) Y2([])Be2Si2O8(OH)2 P 2₁/a 2/m

VIII/B.29-80 Hingganite-(Ce) Ce2Be2(SiO4)2(OH)2 P 2₁/a 2/m

VIII/B.29-90 Hingganite-(Yb) (Yb,Y)2([])Be2Si2O8(OH)2 P 2₁/a 2/m

VIII/B.29-100 Calcybeborosilite-(Y)! (REE,Ca)2[](B,Be)2(SiO4)2(OH,O)2 P 2₁/a 2/m

Other Bakerite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990, AmMin, v 89, p 767) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Bakerite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Bakerite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Bakerite Mineral Data :

Ask about Bakerite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Bakerite Specimen Label here :

Bakerite

Ca4B4(BO4)(SiO4)3(OH)3·(H2O)
Dana No: 54.2.1b.1 Strunz No: VIII/B.29-20
Locality:

Notes: