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Rappoldite

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Formula:
Pb(Co,Ni,Zn)2(AsO4)2 · 2H2O
System:
Triclinic
Colour:
light brown to brown-red
Lustre:
Vitreous
Hardness:
Name:
For its discovery locality
Tsumcorite Group.

Co(II) analogue of Helmutwinklerite.

Classification of Rappoldite

Approved 1998
8.CG.20

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
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First Recorded Occurrence of Rappoldite

General Appearance of First Recorded Material:
rosette-like aggregates of prismatic to tabular crystals to 2 mm
Associated Minerals at First Recorded Locality:

Physical Properties of Rappoldite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
light brown to brown-red
Streak:
pale brown-yellow
Hardness (Mohs):
Cleavage:
None Observed

Crystallography of Rappoldite

Crystal System:
Triclinic

Optical Data of Rappoldite

Type:
Biaxial (+)
RI values:
nα = 1.850 nβ = 1.870 nγ = 1.900
2V:
Measured: 85° , Calculated: 80°
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v distinct

Chemical Properties of Rappoldite

Formula:
Pb(Co,Ni,Zn)2(AsO4)2 · 2H2O
Essential elements:
All elements listed in formula:

Relationship of Rappoldite to other Species

Other Members of Group:
CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2
CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2O
KaliochalciteKCu2(SO4)2[(OH)(H2O)]
Krettnichite(Pb,Sr)(Mn3+,Co)2(VO4)2 · 2(OH,H2O)
LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)
LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)
ManganlotharmeyeriteCa(Mn3+,Zn)2(AsO4)2(OH,H2O)2
MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
MounanaitePbFe23+(VO4)2(OH,F)2
NatrochalciteNaCu2(SO4)2(OH) · 2H2O
Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)
NickeltsumcoritePb(Ni,Fe3+)2(AsO4)2 · (H2O,OH)2
PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)
Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2
ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
TsumcoritePb(Zn,Fe3+)2(AsO4)2 · 2(H2O,OH)
YancowinnaitePbCuAl(AsO4)2OH · H2O
ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)
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.15MounanaitePbFe23+(VO4)2(OH,F)2
8.CG.15ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.15TsumcoritePb(Zn,Fe3+)2(AsO4)2 · 2(H2O,OH)
8.CG.15CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2
8.CG.15Krettnichite(Pb,Sr)(Mn3+,Co)2(VO4)2 · 2(OH,H2O)
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.15ManganlotharmeyeriteCa(Mn3+,Zn)2(AsO4)2(OH,H2O)2
8.CG.15Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2
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.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
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2O

Other Names for Rappoldite

Name in Other Languages:
German:Rappoldit
Spanish:Rappoldita

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 Rappoldite

Reference List:
Effenberger, H., Krause, W., Bernhardt, H.-J. and Martin, M. (2000): On the symmetry of tsumcorite group minerals based on the new species rappoldite and zincgartrellite. Mineralogical Magazine: 64: 1109-1126.

Lapis (2005): 30(7/8): 69.

Internet Links for Rappoldite

Localities for Rappoldite

(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.
Germany
 
  • Saxony
    • Erzgebirge
      • Schneeberg District
        • Neustädtel
[MinRec 32:418]
Mineral and/or Locality  
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