Fresnoite  Mineral Data

Fresnoite Mineral Data

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


General Fresnoite Information

Help on Chemical  Formula: Chemical Formula: Ba2TiSi2O8
Help on Composition: Composition: Molecular Weight = 506.70 gm
   Barium    54.20 %  Ba   60.52 % BaO
   Titanium   9.45 %  Ti   15.76 % TiO2
   Silicon   11.09 %  Si   23.72 % SiO2
   Oxygen    25.26 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba2TiSi2O8
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Big Creek - Rush Creek sanbornite deposit, 5 miles NE of Trimmer, Fresno Co. California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after it's locality.
Help on Name Pronunciation: Name Pronunciation: Fresnoite + Pronunciation Say FRESNOITE
Help on Synonym: Synonym: ICSD 201844
  PDF 22-513
 

Fresnoite Image

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

Fresnoite

Comments: Yellow to peach colored crystals of fresnoite.
Location: Junnila Mine, San Benito County, California, USA. Scale: Crystal size 5 mm.
© John Veevaert

Fresnoite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.61096
Help on Cell Dimensions: Cell Dimensions: a = 8.5291, c = 5.211, Z = 2; V = 379.08 Den(Calc)= 4.44
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal PyramidalH-M Symbol (4mm) Space Group: P 4bm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.077(1), 3.301(0.45), 2.697(0.25),
Click Here for Large Fresnoite 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


Moore P B , Louisnathan S J , Zeitschrift fur Kristallographie , 130 (1969) p.438-448, The crystal structure of fresnoite, Ba2(TiO)Si2O7, Positive polarity, Locality: sanbornite deposits of eastern Fresno County, California, USA

View Additional jPOWD Structure files for Fresnoite
[1]
 

Physical Properties of Fresnoite

Help on Cleavage: Cleavage: {001} Distinct
Help on Color: Color: Greenish yellow, Lemon.
Help on Density: Density: 4.43
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luminescence: Luminescence: Fluorescent, Short UV=yellow.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Fresnoite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.079 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1734,KPDmeas= 0.1738,KC= 0.1887
Ncalc = 1.84
Help on Optical Data: Optical Data: Uniaxial (-), e=1.765, w=1.775, bire=0.0100.
 

Calculated Properties of Fresnoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.95 gm/cc
note: Specific Gravity of Fresnoite =4.43 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PEFresnoite = 245.71 barns/electron
U=PEFresnoite x rElectron Density= 970.99 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fresnoite is Not Radioactive
 

Fresnoite Classification

Help on  Dana Class: Dana Class: 55.04.02.01 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions
  (55.04)with cations in [8] and lower coordination
  (55.04.02)Fresnoite group
 
55.04.02.01 Fresnoite Ba2TiSi2O8 P 4bm 4mm
 
55.04.02.02 Hardystonite Ca2ZnSi2O7 P 421m 4 2m
 
55.04.02.03 Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 2221 2 2 2
 
55.04.02.04 Leucophanite (Na,Ca)2BeSi2(O,OH,F)7 P1 1
 
55.04.02.05 Meliphanite (Ca,Na)2Be[(Si,Al)2O6(F,OH)] I 4 4
 
55.04.02.06 Gugiaite Ca2BeSi2O7 P 421m 4 2m
Help on  Strunz Class: Strunz Class: 09.BE.15 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.15 Fresnoite Ba2TiSi2O8 P 4bm 4mm
 

Other Fresnoite Information

Help on References: References: NAME( MinRec) 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 Fresnoite :
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 Fresnoite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Fresnoite :

A Bijoux Google Search for Fresnoite
Adam's Minerals Google Search for Fresnoite
Cape Minerals Google Search for Fresnoite
Dakota Matrix Minerals Google Search for Fresnoite
Excalibur Mineral Corp. Google Search for Fresnoite
Exceptional Minerals Google Search for Fresnoite
John Betts Fine Minerals Search for Fresnoite
McDougall Minerals Google Search for Fresnoite
Mineral News Website Link
Rock and Mineral Shows Google Search for Fresnoite
Weinrich Minerals, Inc. Google Search for Fresnoite

Ask about Fresnoite 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 Fresnoite Specimen Label here :

Fresnoite

Ba2TiSi2O8
Dana No: 55.04.02.01 Strunz No: 09.BE.15
Locality:

 

Notes: