Gittinsite Mineral Data + Say GITTINSITE

General Gittinsite Information

Help on Chemical  Formula: Chemical Formula: CaZrSi2O7
Help on Composition: Composition: Molecular Weight = 299.47 gm
   Calcium    13.38 %  Ca   18.73 % CaO
   Zirconium  30.46 %  Zr   41.15 % ZrO2
   Silicon    18.76 %  Si   40.13 % SiO2
   Oxygen     37.40 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaZrSi2O7
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 203131
  IMA1970-034
  PDF 33-322
 

Gittinsite Image

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Gittinsite   Eudialyte

Comments: White crystalline gittinsite with red eudialyte.
Location: Kipiwa Complex, Villedieu Township, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gittinsite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7929:1:0.5415
Help on Cell Dimensions: Cell Dimensions: a = 6.878, b = 8.674, c = 4.697, Z = 2; beta = 101.74° V = 274.36 Den(Calc)= 3.62
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.155(1), 3.026(0.8), 3.232(0.8),
Click Here for Large Gittinsite Structure Window Crystal Structure:

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Roelofsen-Ahl J N , Peterson R C , The Canadian Mineralogist , 27 (1989) p.703-708, Gittinsite: A modification of the thortveitite structure

 

Physical Properties of Gittinsite

Help on Cleavage: Cleavage: None
Help on Color: Color: Lemon white.
Help on Density: Density: 3.62
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Streak: Streak: white
 

Optical Properties of Gittinsite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.202,KPDmeas= 0.202,KC= 0.2096
Help on Optical Data: Optical Data: Biaxial (-), a=1.72, b=1.736, g=1.738, bire=0.0180, 2V(Calc)=38, 2V(Meas)=30.
 

Calculated Properties of Gittinsite

Help on Electron Density: Electron Density:

relectron=3.48 gm/cc
note: rGittinsite =3.62 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.04329
Boson Index = 0.95671
Help on Photoelectric: Photoelectric:

PEGittinsite = 43.15 barns/electron
U=PEGittinsite x relectron= 150.22 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Gittinsite is Not Radioactive

 

Gittinsite Classification

Help on  Dana Class: Dana Class: 55.2.1a.1 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions
  (55.2)with cations in [6] coordination
  (55.2.1a)Thortveitite group
 
55.2.1a.1 Gittinsite CaZrSi2O7 C 2/m 2/m
 
55.2.1a.2 Keiviite-(Y) (Y,Yb)2Si2O7 C 2/m 2/m
 
55.2.1a.3 Keiviite-(Yb) (Yb,Y)2Si2O7 C 2/m 2/m
 
55.2.1a.4 Thortveitite (Sc,Y)2Si2O7 C 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/C.01-15 VIII - Silicates
  VIII/C - Sorosilicates, with [Si2O7]6-, without anions unfamiliar to tetraheders
  VIII/C.01 - Thortveitite - Rowlandite-(Y) series
 
VIII/C.01-10 Thortveitite (Sc,Y)2Si2O7 C 2/m 2/m
 
VIII/C.01-15 Gittinsite CaZrSi2O7 C 2/m 2/m
 
VIII/C.01-18 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1
 
VIII/C.01-20 Keiviite-(Y) (Y,Yb)2Si2O7 C 2/m 2/m
 
VIII/C.01-30 Keiviite-(Yb) (Yb,Y)2Si2O7 C 2/m 2/m
 
VIII/C.01-40 Yttrialite-(Y) (Y,Th)2Si2O7 P 21/m 2/m
 
VIII/C.01-45 Percleveite-(Ce)! (Ce,La,Nd)2Si2O7 P 41 4
 
VIII/C.01-50 Rowlandite-(Y) Y4FeSi4O14F2(?) None
 

Other Gittinsite Information

Help on References: References: 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 Gittinsite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Gittinsite

CaZrSi2O7
Dana No: 55.2.1a.1 Strunz No: VIII/C.01-15
Locality:

 

Notes:

 

 
   
 
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