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Gaitite Mineral Data

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General Gaitite Information

Help on Chemical  Formula: Chemical Formula: Ca2Zn(AsO4)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 459.41 gm
   Calcium   17.45 %  Ca   24.41 % CaO
   Zinc      14.23 %  Zn   17.72 % ZnO
   Arsenic   32.62 %  As   50.03 % As2O5
   Hydrogen   0.88 %  H     7.84 % H2O
   Oxygen    34.83 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Zn(AsO4)2•2(H2O)
Help on Environment: Environment: Secondary arsenate mineral.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Tsumeb mine, Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Rober Irwin Gait (1938-), curator of mineralogy, Royal Ontario Museum, Toronto, Canada.
Help on Name Pronunciation: Name Pronunciation: Gaitite Say GAITITE
Help on Synonym: Synonym: IMA1978-047
 

Gaitite Image

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  Gaitite

Comments: Opaque white spherical gaitite with transparent crystalline calcite.
Location: Twin Creeks Mine, Humboldt County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gaitite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8453:1:0.8247
Help on Cell Dimensions: Cell Dimensions: a = 5.899, b = 6.978, c = 5.755, Z = 1; alpha = 94.41°, beta = 109.08°, gamma = 108.09° V = 212.18 Den(Calc)= 3.60
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.781(1), 3.08(0.8), 2.75(0.7),
 

Physical Properties of Gaitite

Help on Cleavage: Cleavage: {010} Good, {001} Good, {011} Good
Help on Color: Color: Colorless, White.
Help on Density: Density: 3.81
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Gaitite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1995,KPDmeas= 0.1917,KC= 0.187
Ncalc = 1.68 - 1.71
Help on Optical Data: Optical Data: Biaxial (+), a=1.713, b=1.73, g=1.748, bire=0.0350, 2V(Calc)=90, 2V(Meas)=88.
 

Calculated Properties of Gaitite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.65 gm/cc
note: Specific Gravity of Gaitite =3.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0062396803
Boson Index = 0.9937603197
Help on Photoelectric: Photoelectric: PEGaitite = 31.40 barns/electron
U=PEGaitite x rElectron Density= 114.59 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gaitite is Not Radioactive
 

Gaitite Classification

Help on  Dana Class: Dana Class: 40.02.02.06 (40)Hydrated Phosphates, etc
  (40.02)where A++ (B++)2 (XO4) � x(H2O)
  (40.02.02)Fairfieldite Subgroup (Triclinic: P-1�)
 
40.02.02.01 Fairfieldite Ca2(Mn,Fe)(PO4)2•2(H2O) P1 1
 
40.02.02.02 Messelite Ca2(Fe,Mn)(PO4)2•2(H2O) P1 1
 
40.02.02.03 Collinsite Ca2(Mg,Fe)(PO4)2•2(H2O) P1 1
 
40.02.02.04 Cassidyite Ca2(Ni,Mg)(PO4)2•2(H2O) P1 1
 
40.02.02.05 Talmessite Ca2Mg(AsO4)2•2(H2O) P1 1
 
40.02.02.06 Gaitite Ca2Zn(AsO4)2•2(H2O) P1 1
 
40.02.02.07 Roselite-beta Ca2(Co,Mg)(AsO4)2•2(H2O) P 1 or P1 Tri
 
40.02.02.08 Parabrandtite Ca2Mn(AsO4)•2(H2O) P1,P 1 Tri
 
40.02.02.09 Hillite! Ca2(Zn,Mg)[PO4]2•2(H2O) P1 1
 
40.02.02.10 Nickeltalmessite! Ca2Ni(AsO4)2•2H2O P 1
Help on  Strunz Class: Strunz Class: 08.CG.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CG -With large and medium-sized cations, RO4:H2O = 1:1
 
08.CG.05 Collinsite Ca2(Mg,Fe)(PO4)2•2(H2O) P1 1
 
08.CG.05 Gaitite Ca2Zn(AsO4)2•2(H2O) P1 1
 
08.CG.05 Cassidyite Ca2(Ni,Mg)(PO4)2•2(H2O) P1 1
 
08.CG.05 Fairfieldite Ca2(Mn,Fe)(PO4)2•2(H2O) P1 1
 
08.CG.05 Messelite Ca2(Fe,Mn)(PO4)2•2(H2O) P1 1
 
08.CG.05 Parabrandtite Ca2Mn(AsO4)•2(H2O) P1,P 1 Tri
 
08.CG.05 Uranophane-beta Ca[(UO2)SiO3(OH)]2•(H2O) P 21/a 2/m
 
08.CG.05 Talmessite Ca2Mg(AsO4)2•2(H2O) P1 1
 
08.CG.05 Hillite! Ca2(Zn,Mg)[PO4]2•2(H2O) P1 1
 

Other Gaitite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990, AmMin 90:522) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Gaitite :
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

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Gaitite

Ca2Zn(AsO4)2•2(H2O)
Dana No: 40.02.02.06 Strunz No: 08.CG.05
Locality:

 

Notes:

 

 
   
 


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