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Ca2Ni(AsO4)2 · 2H2O

Classification of Nickeltalmessite

Approved 2008

C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1

2 : AB2(XO4)2·xH2O URL:
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Type Occurrence of Nickeltalmessite

Crystallography of Nickeltalmessite

Crystal System:
Class (H-M):
1 - Pinacoidal
Space Group:
Cell Parameters:
a = 5.858(7) Å, b = 7.082(12) Å, c = 5.567(6) Å
α = 97.20(4)°, β = 109.11(5)°, γ = 109.78(5)°
a:b:c = 0.827 : 1 : 0.786
X-Ray Powder Diffraction Data:
5.05 (27)
3.57 (43)
3.358 (58)
3.202 (100)
3.099 (64)
2.813 (60)
2.772 (68)
1.714 (39)

Chemical Properties of Nickeltalmessite

Ca2Ni(AsO4)2 · 2H2O
Essential elements:
All elements listed in formula:

Relationship of Nickeltalmessite to other Species

Other Members of Group:
CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2O
CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2O
FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2O
GaititeCa2Zn(AsO4)2 · 2H2O
MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2O
ParabrandtiteCa2Mn2+(AsO4)2 · 2H2O
TalmessiteCa2Mg(AsO4)2 · 2H2O
Unnamed (Fe2+-analogue of Parabrandtite)Ca2Fe2+(AsO4)2 · 2H2O
β-RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
8.CG.05CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2O
8.CG.05CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2O
8.CG.05FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2O
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2O
8.CG.05MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2O
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2O
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2O
8.CG.05HilliteCa2(Zn,Mg)(PO4)2 · 2 H2O
8.CG.10BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2O
8.CG.10RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2O
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2O
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2O
8.CG.15FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
8.CG.15LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)
8.CG.15MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
8.CG.15ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2O
8.CG.15CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15NickellotharmeyeriteCa(Ni,Fe3+,Co)2(AsO4)2 · 2(H2O,OH)
8.CG.15Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)
8.CG.20GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.20HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2O
8.CG.20ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)
8.CG.20RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2O
8.CG.20PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)
8.CG.20LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)
8.CG.25PottsiteHPbBi(VO4)2 · 2H2O

Other Names for Nickeltalmessite

Name in Other Languages:

Other Information

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

References for Nickeltalmessite

Reference List:
N. V. Chukanov, A. A. Mukhanova, Sh. Mockel, D. I. Belakovskiy, L. A. Levitskaya (2009): Nickeltalmessite, Ca2Ni(AsO4)2 · 2H2O — a new fairfieldite-group mineral from Bou-Azzer. Morocco. ZRMO 138(4), 32-39.

N. V. Chukanov, A. A. Mukhanova, S. Möckel, D. I. Belakovsky und L. A. Levitskaya (2010): Nickeltalmessite, Ca2Ni(AsO4)2 • 2H2O, a new mineral species of the fairfieldite group, Bou Azzer, Morocco. Geology of Ore Deposits 52, 606-611.

Internet Links for Nickeltalmessite

Localities for Nickeltalmessite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Atacama Region
    • Huasco Province
Tony Nikischer specimen
Morocco (TL)
  • Souss-Massa-Draâ Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azer District (Bou Azzer District)
          • Aït Ahmane
ZRMO 138(4),32-39 (2009); N. V. Chukanov, A. A. Mukhanova, S. Möckel, D. I. Belakovsky und L. A. Levitskaya (2010): Nickeltalmessite, Ca2Ni(AsO4)2 • 2H2O, a new mineral species of the fairfieldite group, Bou Azzer, Morocco. Geology of Ore Deposits 52, 606-611.
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