Killalaite Mineral Data

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


B and L Minerals
[New Items] [Specials] [Login] [Register] [Auction Items]
B & L Minerals, Fine Mineral specimens for sale for collectors of all levels


General Killalaite Information

Help on Chemical Formula: Chemical Formula: 2Ca3Si2O7•(H2O)
Help on Composition: Composition: Molecular Weight = 594.82 gm
   Calcium   40.43 %  Ca   56.57 % CaO
   Silicon   18.89 %  Si   40.41 % SiO2
   Hydrogen   0.34 %  H     3.03 % H2O
   Oxygen    40.35 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca6Si4O14•(H2O)
Help on Environment: Environment: A secondary mineral in cavities and veins in hydrothermally altered and thermally metamorphosed limestones.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: From near Inishcrone, along the east shore of Killala Bay, Co. Sligo, and at Carneal, Co. Antrim, Ireland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality
Help on Name Pronunciation: Name Pronunciation: Killalaite + Pronunciation Say KILLALAITE
Help on Synonym: Synonym: ICSD 200124
  PDF 29-332
 

Killalaite Image

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

Killalaite

Comments: B&W PPL image of killalaite crystals in a vein of calcite. MinMag v39:544.
Location: Thermally metamorphosed limestone near Inishcrone, along the eastern shore of Killala Bay, Co. Sligo, Ireland. Scale: Crystal Size 0.5 mm.
© Mineralogical Magazine

Killalaite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4403:1:0.4405
Help on Cell Dimensions: Cell Dimensions: a = 6.807, b = 15.459, c = 6.811, Z = 2; beta = 97.76° V = 710.15 Den(Calc)= 2.78
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.824(1), 3.03(0.8), 2.724(0.6),
Click Here for Large Killalaite 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


Taylor H F W , Mineralogical Magazine , 41 (1977) p.363-369, The crystal structure of killalaite, Locality: Killala Bay, Ireland

 

Physical Properties of Killalaite

Help on Cleavage: Cleavage: {100} Perfect, {010} Good, {001} Good
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.94
Help on Streak: Streak: white
 

Optical Properties of Killalaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.019 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.078 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2297,KPDmeas= 0.2172,KC= 0.2131
Ncalc = 1.59 - 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.635, g=1.642, bire=0.0070, 2V(Meas)=26.
 

Calculated Properties of Killalaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.95 gm/cc
note: Specific Gravity of Killalaite =2.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0095600872
Boson Index = 0.9904399128
Help on Photoelectric: Photoelectric: PEKillalaite = 5.67 barns/electron
U=PEKillalaite x rElectron Density= 16.69 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Killalaite is Not Radioactive
 

Killalaite Classification
Help on Dana Class: Dana Class: 56.02.09.02 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.09)Tilleyite - Killalaite group
 
56.02.09.01 Tilleyite Ca5Si2O7(CO3)2 P 21/a 2/m
 
56.02.09.02 Killalaite 2Ca3Si2O7•(H2O) P 21/m 2/m
 
56.02.09.03 Foshallasite? Ca3Si2O7•3(H2O) Mono
Help on Strunz Class: Strunz Class: 09.BE.85 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.85 Killalaite 2Ca3Si2O7•(H2O) P 21/m 2/m
 

Other Killalaite Information
Help on References: References: NAME( AntBidBlaNic2) 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 Killalaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Killalaite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Killalaite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Killalaite Mineral Data :

Ask about Killalaite 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 Espaņol

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

Killalaite

2Ca3Si2O7•(H2O)
Dana No: 56.02.09.02 Strunz No: 09.BE.85
Locality:

 

Notes: