Scolecite Mineral Data

Scolecite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About



[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.


General Scolecite Information

Help on Chemical Formula: Chemical Formula: CaAl2Si3O10•3(H2O)
Help on Composition: Composition: Molecular Weight = 392.34 gm
   Calcium   10.22 %  Ca   14.29 % CaO
   Aluminum  13.75 %  Al   25.99 % Al2O3
   Silicon   21.48 %  Si   45.94 % SiO2
   Hydrogen   1.54 %  H    13.78 % H2O
   Oxygen    53.01 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl2Si3O10•3(H2O)
Help on Environment: Environment: Low temperature alteration of basalts and related rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1813
Help on Locality: Locality: Kaiserstuhl in Baden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, skolec = 'worm' in reference to the mineral's reaction to the blowpipe flame.
Help on Name Pronunciation: Name Pronunciation: Scolecite + Pronunciation Say SCOLECITE
Help on Synonym: Synonym: ICSD 30967
  PDF 41-1355
 

Scolecite Image

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

Scolecite

Comments: Delicate cluster spray of colorless transparent acicular crystals of scolecite. The scolecites measure to 3 mm in thickness.
Location: Nasik district, Maharashtra, India. Scale: 5 x 3.5 x 9.5 cm.
© Dan Weinrich

Scolecite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.3438:1:0.5151
Help on Cell Dimensions: Cell Dimensions: a = 6.516, b = 18.948, c = 9.761, Z = 4; beta = 108.98° V = 1,139.62 Den(Calc)= 2.29
Help on Crystal System: Crystal System: Monoclinic - DomaticH-M Symbol (m) Space Group: Cc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.882(1), 5.85(1), 6.59(0.9),
Click Here for Large Scolecite Structure Window 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


Comodi P , Gatta G D , Zanazzi P F , European Journal of Mineralogy , 14 (2002) p.567-574, High-pressure structural behaviour of scolecite, Sample: P = .0001 GPa

View Additional jPOWD Structure files for Scolecite
[1] [2] [3] [4] [5]
 

Physical Properties of Scolecite

Help on Cleavage: Cleavage: {110} Perfect
Help on Color: Color: Brownish, Colorless, White.
Help on Density: Density: 2.16 - 2.4, Average = 2.28
Help on Diaphaneity: Diaphaneity: Transparent to subtranslucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white
 

Optical Properties of Scolecite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2252,KPDmeas= 0.2262,KC= 0.2262
Ncalc = 1.49 - 1.54
Help on Optical Data: Optical Data: Biaxial (-), a=1.507-1.513, b=1.516-1.52, g=1.517-1.521, bire=0.0080-0.0100, 2V(Calc)=36-40, 2V(Meas)=36-56. Dispersion relatively strong.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Scolecite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.30 gm/cc
note: Specific Gravity of Scolecite =2.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEScolecite = 2.50 barns/electron
U=PEScolecite x rElectron Density= 5.75 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Scolecite is Not Radioactive
 

Scolecite Classification
Help on Dana Class: Dana Class: 77.01.05.05 (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.05)Natrolite and related species
 
77.01.05.01 Natrolite Na2[Al2Si3O10]•2(H2O) F dd2 mm2
 
77.01.05.02 Tetranatrolite? Na2[Al2Si3O10]•2(H2O) I 42d 4 2m
 
77.01.05.03 Paranatrolite Na2[Al2Si3O10]•3(H2O) Cc m
 
77.01.05.04 Mesolite Na2Ca2Al6Si9O30•8(H2O) C 2 2
 
77.01.05.05 Scolecite CaAl2Si3O10•3(H2O) Cc m
 
77.01.05.06 Edingtonite BaAl2Si3O10•4(H2O) P 21212 2 2 2
 
77.01.05.07 Gonnardite Na2CaAl4Si6O20•7(H2O) I 42d 4 2m
 
77.01.05.08 Cowlesite CaAl2Si3O10•5-6(H2O) P 2221, P mmm, Pmm2 Ortho
 
77.01.05.09 Thomsonite-Ca NaCa2Al5Si5O20•6(H2O) Pncn 2/m 2/m 2/m
 
77.01.05.10 Thomsonite-Sr! (Sr,Ca)2Na[Al5Si5O20]•7(H2O) Pcnn 2/m 2/m 2/m
 
77.01.05.11 Nabesite! Na2BeSi4O10•4(H2O) P 212121 2 2 2
Help on Strunz Class: Strunz Class: 09.GA.05 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GA -Zeolites with T5O10 Units – The Fibrous Zeolites
 
09.GA.05 Gonnardite Na2CaAl4Si6O20•7(H2O) I 42d 4 2m
 
09.GA.05 Mesolite Na2Ca2Al6Si9O30•8(H2O) C 2 2
 
09.GA.05 Natrolite Na2[Al2Si3O10]•2(H2O) F dd2 mm2
 
09.GA.05 Paranatrolite Na2[Al2Si3O10]•3(H2O) Cc m
 
09.GA.05 Scolecite CaAl2Si3O10•3(H2O) Cc m
 
09.GA.05 Tetranatrolite? Na2[Al2Si3O10]•2(H2O) I 42d 4 2m
 

Other Scolecite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Scolecite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - HyperPhysics
11 - MinDAT
12 - MinMax(Deutsch)
13 - MinMax(English)
14 - Mineralienatlas (Deutsch)
15 - Philatelic Mineralogy
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST
19 - theimage

Search for Scolecite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Scolecite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Scolecite Mineral Data :

Ask about Scolecite 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 Scolecite Specimen Label here :

Scolecite

CaAl2Si3O10•3(H2O)
Dana No: 77.01.05.05 Strunz No: 09.GA.05
Locality:

 

Notes: