Datolite Mineral Data (original) (raw)

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

Click Here for Larger Datolite Image in a New Browser Window Images:

Click Here for Larger Datolite Image 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) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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: