Datolite Mineral Data

Datolite Mineral Data
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General Datolite Information

Help on Chemical Formula: Chemical Formula: CaBSiO4(OH)
Help on Composition: Composition: Molecular Weight = 159.98 gm
   Calcium   25.05 %  Ca   35.05 % CaO
   Silicon   17.56 %  Si   37.56 % SiO2
   Boron      6.76 %  B    21.76 % B2O3
   Hydrogen   0.63 %  H     5.63 % H2O
   Oxygen    50.00 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaB(SiO4)(OH)
Help on Environment: Environment: Secondary mineral in basic igneous rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1806
Help on Locality: Locality: Diabases of the Connecticut River valley, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, dateisthai, meaning "to divide," because granular aggregates crumble readily.
Help on Name Pronunciation: Name Pronunciation: Datolite Say DATOLITE
Help on Synonym: Synonym: ICSD 22026
  PDF 36-429
 

Datolite Image

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Datolite

Comments: Cluster of doubly-terminated datolite crystals to 3.3 cm across with a scattering of brown inclusions.
Location: Boron Pit, Dal'Negorsk, Russia. Scale: 5x3.9x3.7 cm.
© Fabre Minerals

Datolite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.2643:1:0.6321
Help on Cell Dimensions: Cell Dimensions: a = 9.66, b = 7.64, c = 4.83, Z = 4; beta = 90.15° V = 356.46 Den(Calc)= 2.98
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.114(1), 2.855(0.65), 2.189(0.6),
Help on Forms: Forms:

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Forms: ( 1 1 0) ( 0 1 1) ( 1 1 2) ( 1 0 0) ( 1 1 1)

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Click Here for Large Datolite Structure Window Crystal Structure:

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Foit F F , Phillips M W , Gibbs G V , American Mineralogist , 58 (1973) p.909-914, A refinement of the crystal structure of datolite, CaBSiO4(OH)

View Additional jPOWD Structure files for Datolite
[1]
 

Physical Properties of Datolite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Colorless, Yellow, White, Light green.
Help on Density: Density: 2.8 - 3, Average = 2.9
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Porcelainous - Fine-grained, translucent massive material like broken china
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Datolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2181,KPDmeas= 0.2241,KC= 0.2177
Ncalc = 1.61 - 1.65
Help on Optical Data: Optical Data: Biaxial (-), a=1.626, b=1.653-1.654, g=1.67, bire=0.0440, 2V(Calc)=72-74, 2V(Meas)=74. Dispersion none.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
 

Calculated Properties of Datolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Datolite =2.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEDatolite = 3.83 barns/electron
U=PEDatolite x rElectron Density= 11.41 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Datolite is Not Radioactive
 

Datolite Classification
Help on Dana Class: Dana Class: 54.02.01a.01 (54)Nesosilicate Borosilicates and Some Beryllosilicates
  (54.02)with B in [4] coordination
  (54.02.01a)Datolite group (Datolite series)
 
54.02.01a.01 Datolite CaBSiO4(OH) P 21/c 2/m
 
54.02.01a.02 Hingganite-(Ce) (Ce,Ca)2([],Fe)Be2Si2O8[(OH),O]2 P 21/a 2/m
 
54.02.01a.03 Hingganite-(Y) Y2([])Be2Si2O8(OH)2 P 21/a 2/m
 
54.02.01a.04 Hingganite-(Yb) (Yb,Y)2([])Be2Si2O8(OH)2 P 21/a 2/m
 
54.02.01a.05 Calcybeborosilite-(Y)! (REE,Ca)2[](B,Be)2(SiO4)2(OH,O)2 P 21/a 2/m
Help on Strunz Class: Strunz Class: 09.AJ.20 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AJ -Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra,
 
09.AJ.20 Bakerite Ca4B4(BO4)(SiO4)3(OH)3•(H2O) P 21/c 2/m
 
09.AJ.20 Calcybeborosilite-(Y)! (REE,Ca)2[](B,Be)2(SiO4)2(OH,O)2 P 21/a 2/m
 
09.AJ.20 Calciogadolinite? CaREE(Fe)Be2Si2O10 P 21/a 2/m
 
09.AJ.20 Datolite CaBSiO4(OH) P 21/c 2/m
 
09.AJ.20 Hingganite-(Yb) (Yb,Y)2([])Be2Si2O8(OH)2 P 21/a 2/m
 
09.AJ.20 Homilite Ca2(Fe,Mg)B2Si2O10 P 21/a 2/m
 
09.AJ.20 Gadolinite-(Ce) (Ce,La,Nd,Y)2FeBe2Si2O10 P 21/c 2/m
 
09.AJ.20 Gadolinite-(Y) Y2FeBe2Si2O10 P 21/a 2/m
 
09.AJ.20 Hingganite-(Ce) (Ce,Ca)2([],Fe)Be2Si2O8[(OH),O]2 P 21/a 2/m
 
09.AJ.20 Hingganite-(Y) Y2([])Be2Si2O8(OH)2 P 21/a 2/m
 
09.AJ.20 Melanocerite-(Ce) (Ce,Th,Ca)5(Si,B)3O12(OH,F)•n(H2O)(?) Unk (HEX-R) Trig
 
09.AJ.20 Minasgeraisite-(Y) CaY2Be2Si2O10 P 21/a 2/m
 

Other Datolite Information
Help on See Also: See Also: Links to other databases for Datolite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Amethyst Galleries' Mineral Gallery
6 - Athena
7 - EUROmin Project
8 - Ecole des Mines de Paris
9 - Franklin Minerals(Dunn)
10 - Franklin Minerals(Palache)
11 - GeoScienceWorld
12 - Glendale Community College
13 - Google Images
14 - Google Scholar
15 - Handbook of Mineralogy (MinSocAm)
16 - Handbook of Mineralogy (UofA)
17 - MinDAT
18 - Mineralienatlas (Deutsch)
19 - Online Mineral Museum
20 - QUT Mineral Atlas
21 - Ruff.Info
22 - WWW-MINCRYST
23 - YupRocks
24 - theimage

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Ask about Datolite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
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Rockhounds Discussion Group on Yahoo Groups
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Print or Cut-and-Paste your Datolite Specimen Label here :

Datolite

CaBSiO4(OH)
Dana No: 54.02.01a.01 Strunz No: 09.AJ.20
Locality:

 

Notes: