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Gaitite

A valid IMA mineral species
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09469860015502627562904.jpg
Gaitite

Cogolla Alta mine, La Ventosilla farmhouse, Belalcázar, Córdoba, Andalusia, Spain
08778080014950978088895.jpg
Gaitite, etc.

Plaka Mine No. 80, Plaka Mines, Plaka, Lavrion mining district, Lavreotiki, East Attica, Attica, Greece
02880820014949555926349.jpg
Gaitite, etc.

Twin Creeks Mine, Potosi Mining District, Osgood Mountains, Humboldt County, Nevada, USA
08891940015491259161638.jpg
Gaitite

Cogolla Alta mine, La Ventosilla farmhouse, Belalcázar, Córdoba, Andalusia, Spain
08778080014950978088895.jpg
Gaitite, etc.

Plaka Mine No. 80, Plaka Mines, Plaka, Lavrion mining district, Lavreotiki, East Attica, Attica, Greece
08215250014947599478282.jpg
Gaitite, etc.

Twin Creeks Mine, Potosi Mining District, Osgood Mountains, Humboldt County, Nevada, USA
06285640015697184509800.jpg
Gaitite

Cogolla Alta mine, La Ventosilla farmhouse, Belalcázar, Córdoba, Andalusia, Spain
08778080014950978088895.jpg
Gaitite, etc.

Plaka Mine No. 80, Plaka Mines, Plaka, Lavrion mining district, Lavreotiki, East Attica, Attica, Greece
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About GaititeHide

Formula:
Ca2Zn(AsO4)2 · 2H2O
Colour:
White to colorless
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
3.81
Crystal System:
Triclinic
Name:
Named in 1980 by Bozidar Darko Sturman and Pete J. Dunn in honor of Robert Irwin Gait [b. September 12, 1938], mineralogist, Curator of the mineral and gem collection (1967-1996), Royal Ontario Museum, Toronto, Ontario, for his contributions to mineralogy and curatorial excellence.
Dimorph of:
Zincroselite
Fairfieldite Group. Gaitite-Talmessite Series.



Unique IdentifiersHide

Mindat ID:
1636
Long-form identifier:
mindat:1:1:1636:6
GUID
(UUID V4):
8ef337a6-0a86-465f-94e9-2863248f5154

IMA Classification of GaititeHide

Classification of GaititeHide

Strunz-mindat (2024):
8.CG.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
Dana 8th ed.:
40.2.2.6

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
Hey's CIM Ref.:
20.3.11

20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
GtIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of GaititeHide

Lustre:
Vitreous
Transparency:
Translucent
Colour:
White to colorless
Streak:
White
Hardness:
5 on Mohs scale
Cleavage:
Distinct/Good
{010}, {001}, and {011}, probable, equally good.
Density:
3.81(5) g/cm3 (Measured)    3.82 g/cm3 (Calculated)

Optical Data of GaititeHide

Type:
Biaxial (+)
RI values:
nα = 1.713 nβ = 1.730 nγ = 1.748
2V:
Measured: 88° , Calculated: 90°
Max Birefringence:
δ = 0.035
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak

Chemistry of GaititeHide

Mindat Formula:
Ca2Zn(AsO4)2 · 2H2O
Elements listed:
As, Ca, H, O, Zn - search for minerals with similar chemistry

Crystallography of GaititeHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.9 Å, b = 7.61 Å, c = 5.57 Å
α = 111.67°, β = 70.83°, γ = 119.42°
Ratio:
a:b:c = 0.775 : 1 : 0.732
Unit Cell V:
199.08 ų (Calculated from Unit Cell)
Z:
1

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0007063GaititeKeller P, Lissner F, Schleid T (2004) The crystal structures of zincroselite and gaitite: Two natural polymorphs of Ca2Zn[AsO4]2*2H2O from Tsumeb, Namibia European Journal of Mineralogy 16 353-3592004Tsumeb, Namibia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.781 Å(100)
3.080 Å(80)
2.750 Å(70)
1.721 Å(60)
3.350 Å(50)
3.208 Å(50)
5.05 Å(40)
Comments:
Tsumeb, Namibia. Data from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47d : [Arsenates, antimonates, selenates, bismuthinates]

Type Occurrence of GaititeHide

Type Locality:
ⓘ Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia
General Appearance of Type Material:
Polycrystalline coatings; only a few small crystals were found, with the largest dimension of about 1 mm.
Place of Conservation of Type Material:
Royal Ontario Museum, Toronto, Ontario, Canada, M35388.
National Museum of Natural History, Washington, D.C., USA, 144799.
Associated Minerals at Type Locality:
ProsperiteAdamiteConichalciteChalcocite
Reference:
Sturman, B.D., Dunn, P.J. (1980) Gaitite, H2Ca2Zn(AsO4)2(OH)2, a new mineral from Tsumeb, Namibia. The Canadian Mineralogist: 18: 197-200.
Download:
https://rruff.info/rruff_1.0/uploads/CM18_197.pdf

Synonyms of GaititeHide

Other Language Names for GaititeHide

German:Gaitit
Russian:Гаитит
Spanish:Gaitita

Relationship of Gaitite to other SpeciesHide

Member of:
Fairfieldite Group
Other Members of this group:
AnorthoroseliteCa2Co(AsO4)2 · 2H2OTric.
CassidyiteCa2Ni(PO4)2 · 2H2OTric.
CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
FairfielditeCa2Mn2+(PO4)2 · 2H2OTric. 1 : P1
HilliteCa2Zn(PO4)2 · 2H2OTric. 1 : P1
MesseliteCa2Fe2+(PO4)2 · 2H2OTric. 1 : P1
NickeltalmessiteCa2Ni(AsO4)2 · 2H2OTric. 1 : P1
ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric. 1 : P1
TalmessiteCa2Mg(AsO4)2 · 2H2OTric. 1 : P1
Unnamed (Fe2+-analogue of Parabrandtite)Ca2Fe2+(AsO4)2 · 2H2O
Forms a series with:
TalmessiteGaitite-Talmessite Series

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Gaitite associated with CalciteCaCO3
1 photo of Gaitite associated with PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O

Related Minerals - Strunz-mindat GroupingHide

8.CG.Ca-HuréauliteCaMn5(PO4)4 · 4H2O
8.CG.FluckiteCaMn2+(AsO3OH)2 · 2H2OTric. 1 : P1
8.CG.DondoelliteCa2Fe(PO4)2 · 2H2OTric. 1 : P1
8.CG.AlumolukrahniteCa[CuAl](AsO4)2(H2O,OH)2Tric. 1 : P1
8.CG.05CassidyiteCa2Ni(PO4)2 · 2H2OTric.
8.CG.05CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
8.CG.05FairfielditeCa2Mn2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05MesseliteCa2Fe2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05AnorthoroseliteCa2Co(AsO4)2 · 2H2OTric.
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05HilliteCa2Zn(PO4)2 · 2H2OTric. 1 : P1
8.CG.05Unnamed (Fe2+-analogue of Parabrandtite)Ca2Fe2+(AsO4)2 · 2H2O
8.CG.10BrandtiteCa2Mn2+(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RoseliteCa2Co(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10Unnamed (Fe2+-analogue of Brandtite)Ca2Fe2+(AsO4)2 · 2H2O
8.CG.15FerrilotharmeyeriteCaZnFe3+(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15LotharmeyeriteCaZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15MawbyitePbFe3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15MounanaitePbFe3+2(VO4)2(OH,F)2Mon. 2/m : B2/m
8.CG.15ThometzekitePbCu2+2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15CobaltlotharmeyeriteCaCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15CabalzariteCaMg2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
8.CG.15CobalttsumcoritePbCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15NickellotharmeyeriteCaNi2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15SchneebergiteBiCo2(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15NickelschneebergiteBiNi2(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15YancowinnaitePbCuAl(AsO4)2OH · H2O Tric. 1 : P1
8.CG.15NickeltsumcoritePb(Ni,Fe3+)2(AsO4)2(H2O,OH)2Mon. 2/m : B2/m
8.CG.15MagnesiofluckiteCaMg(AsO3OH)2(H2O)2Tric. 1 : P1
8.CG.20GartrellitePbCuFe3+(AsO4)2(OH) · H2OTric. 1 : P1
8.CG.20HelmutwinkleritePbZn2(AsO4)2 · 2H2OTric. 1 : P1
8.CG.20ZincgartrellitePbZn2(AsO4)2(H2O,OH)2Tric. 1 : P1
8.CG.20RappolditePbCo2(AsO4)2 · 2H2OTric. 1 : P1
8.CG.20PhosphogartrellitePbCuFe3+(PO4)2(OH,H2O)2Tric. 1 : P1
8.CG.20LukrahniteCaCuFe3+(AsO4)2(OH,H2O)2Tric. 1 : P1
8.CG.25Pottsite(Pb3xBi4-2x)(VO4)4 · H2O (0.8 < x < 1.0)Tet. 4/m : I41/a
8.CG.25Armellinoite-(Ce)Ca4Ce4+(AsO4)4 · H2OTet. 4/m : I41/a
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2OTric. 1 : P1
8.CG.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.

Fluorescence of GaititeHide

In UV light:
Not fluorescent.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for GaititeHide

References for GaititeHide

Localities for GaititeHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Germany
 
  • Rhineland-Palatinate
    • Rhein-Lahn-Kreis
      • Lahnstein
        • Friedrichssegen
Schnorrer et al. (1993)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion mining district
          • Agios Konstantinos (Kamariza)
            • Mercati mines
Rieck (1999)
          • Plaka
            • Plaka Mines
Fritz Schreiber collection
Namibia (TL)
 
  • Oshikoto Region
    • Tsumeb
Sturman et al. (1980) +1 other reference
Spain
 
  • Andalusia
    • Córdoba
      • Belalcázar
        • La Ventosilla farmhouse
Rewitzer et al. (2018)
USA
 
  • Nevada
    • Humboldt County
      • Osgood Mountains
        • Potosi Mining District
Castor et al. (2004)
Min News (1999)
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