Helmutwinklerite
A valid IMA mineral species
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About Helmutwinklerite
Formula:
PbZn2(AsO4)2 · 2H2O
Zn may be replaced by minor Cu.
Colour:
Colourless to sky blue
Lustre:
Vitreous, Resinous
Hardness:
4½
Specific Gravity:
5.3
Crystal System:
Triclinic
Member of:
Name:
Named in honor of Helmut Gustav Franz Winkler (3 April 1915, Kiel, Germany - 10 November 1980, Göttingen, Germany), crystallographer and experimental petrologist. He worked at different times as Director of the Institute of Crystallography, University of Göttingen and as the Director of the Mineralogical Institute, Philipps-Universität Marburg. He wrote the famous book "Petrogenesis of Metamorphic Rocks" and received many honors.
Unique Identifiers
Mindat ID:
1854
Long-form identifier:
mindat:1:1:1854:4
GUID
(UUID V4):
(UUID V4):
7075816b-9cde-4537-b501-3e1f928c425d
IMA Classification of Helmutwinklerite
Approved
Approval year:
1979
First published:
1983
Classification of Helmutwinklerite
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
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
Dana 7th ed.:
40.2.9.2
40.2.9.2
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
20.5.7
20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb
20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Hwk | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Helmutwinklerite
Vitreous, Resinous
Transparency:
Transparent, Translucent
Colour:
Colourless to sky blue
Streak:
White
Hardness:
4½ on Mohs scale
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
5.3(1) g/cm3 (Measured) 5.25(4) g/cm3 (Calculated)
Optical Data of Helmutwinklerite
Type:
Biaxial (+)
RI values:
nα = 1.720 - 1.830 nβ = 1.800 - 1.870 nγ = 1.890 - 1.980
2V:
Measured: 70° (5), Calculated: 66° to 88°
Max Birefringence:
δ = 0.170
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v medium
Chemistry of Helmutwinklerite
Mindat Formula:
PbZn2(AsO4)2 · 2H2O
Zn may be replaced by minor Cu.
Zn may be replaced by minor Cu.
Common Impurities:
Cu
Crystallography of Helmutwinklerite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.610 Å, b = 7.617 Å, c = 5.606 Å
α = 70.19°, β = 69.91°, γ = 69.18°
α = 70.19°, β = 69.91°, γ = 69.18°
Ratio:
a:b:c = 0.737 : 1 : 0.736
Unit Cell V:
203.77 ų (Calculated from Unit Cell)
Z:
1
Comment:
pseudomonoclinic
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0006712 | Helmutwinklerite | Krause W, Belendorff K, Bernhardt H J, McCammon C A, Effenberger H, Mikenda W (1998) Crystal chemistry of the tsumcorite-group minerals. New data on ferrilotharmeyerite, tsumcorite, thometzekite, mounanaite, helmutwinklerite, and a redefinition of gartrellite European Journal of Mineralogy 10 179-206 | 1998 | Tsumeb mine, Namibia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.579 Å | (100) |
4.697 Å | (80) |
3.075 Å | (75) |
3.269 Å | (70) |
2.768 Å | (50) |
1.735 Å | (50) |
6.953 Å | (40) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47c : [Carbonates, phosphates, borates, nitrates] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Helmutwinklerite
Place of Conservation of Type Material:
Gottingen University, Gottingen, Germany
Associated Minerals at Type Locality:
Reference:
Süsse, P., Schnorrer-Köhler, G. (1983) Helmutwinklerite, a new arsenate mineral from Tsumeb, S.W. Africa. Neues Jahrbuch für Mineralogie, Monatshefte: 1980: 118-124.
Synonyms of Helmutwinklerite
Other Language Names for Helmutwinklerite
Relationship of Helmutwinklerite to other Species
Member of:
Other Members of this group:
Alumolukrahnite | Ca[CuAl](AsO4)2(H2O,OH)2 | Tric. 1 : P1 |
Cabalzarite | CaMg2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
Cobalttsumcorite | PbCo2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
Ferrilotharmeyerite | CaZnFe3+(AsO4)2(OH) · H2O | Mon. 2/m : B2/m |
Gartrellite | PbCuFe3+(AsO4)2(OH) · H2O | Tric. 1 : P1 |
Kaliochalcite | KCu2(SO4)2[(OH)(H2O)] | Mon. 2/m : B2/m |
Krettnichite | PbMn3+2(VO4)2(OH)2 | Mon. 2/m : B2/m |
Lotharmeyerite | CaZn2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
Lukrahnite | CaCuFe3+(AsO4)2(OH,H2O)2 | Tric. 1 : P1 |
Manganlotharmeyerite | CaMn3+2(AsO4)2(OH)2 | Mon. 2/m : B2/m |
Mawbyite | PbFe3+2(AsO4)2(OH)2 | Mon. 2/m : B2/m |
Mounanaite | PbFe3+2(VO4)2(OH,F)2 | Mon. 2/m : B2/m |
Natrochalcite | NaCu2(SO4)2(OH) · 2H2O | Mon. 2/m : B2/m |
Nickellotharmeyerite | CaNi2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
Nickelschneebergite | BiNi2(AsO4)2(OH) · H2O | Mon. 2/m : B2/m |
Nickeltsumcorite | Pb(Ni,Fe3+)2(AsO4)2(H2O,OH)2 | Mon. 2/m : B2/m |
Phosphogartrellite | PbCuFe3+(PO4)2(OH,H2O)2 | Tric. 1 : P1 |
Rappoldite | PbCo2(AsO4)2 · 2H2O | Tric. 1 : P1 |
Schneebergite | BiCo2(AsO4)2(OH) · H2O | Mon. 2/m : B2/m |
Thometzekite | PbCu2+2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
Tsumcorite | PbZn2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
Yancowinnaite | PbCuAl(AsO4)2OH · H2O | Tric. 1 : P1 |
Zincgartrellite | PbZn2(AsO4)2(H2O,OH)2 | Tric. 1 : P1 |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
8.CG. | Ca-Huréaulite | CaMn5(PO4)4 · 4H2O |
8.CG. | Fluckite | CaMn2+(AsO3OH)2 · 2H2O |
8.CG. | Dondoellite | Ca2Fe(PO4)2 · 2H2O |
8.CG. | Alumolukrahnite | Ca[CuAl](AsO4)2(H2O,OH)2 |
8.CG.05 | Cassidyite | Ca2Ni(PO4)2 · 2H2O |
8.CG.05 | Collinsite | Ca2Mg(PO4)2 · 2H2O |
8.CG.05 | Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O |
8.CG.05 | Gaitite | Ca2Zn(AsO4)2 · 2H2O |
8.CG.05 | Messelite | Ca2Fe2+(PO4)2 · 2H2O |
8.CG.05 | Parabrandtite | Ca2Mn2+(AsO4)2 · 2H2O |
8.CG.05 | Anorthoroselite | Ca2Co(AsO4)2 · 2H2O |
8.CG.05 | Talmessite | Ca2Mg(AsO4)2 · 2H2O |
8.CG.05 | Hillite | Ca2Zn(PO4)2 · 2H2O |
8.CG.05 | Unnamed (Fe2+-analogue of Parabrandtite) | Ca2Fe2+(AsO4)2 · 2H2O |
8.CG.10 | Brandtite | Ca2Mn2+(AsO4)2 · 2H2O |
8.CG.10 | Roselite | Ca2Co(AsO4)2 · 2H2O |
8.CG.10 | Wendwilsonite | Ca2Mg(AsO4)2 · 2H2O |
8.CG.10 | Zincroselite | Ca2Zn(AsO4)2 · 2H2O |
8.CG.10 | Rruffite | Ca2Cu(AsO4)2 · 2H2O |
8.CG.10 | Unnamed (Fe2+-analogue of Brandtite) | Ca2Fe2+(AsO4)2 · 2H2O |
8.CG.15 | Ferrilotharmeyerite | CaZnFe3+(AsO4)2(OH) · H2O |
8.CG.15 | Lotharmeyerite | CaZn2(AsO4)2 · 2H2O |
8.CG.15 | Mawbyite | PbFe3+2(AsO4)2(OH)2 |
8.CG.15 | Mounanaite | PbFe3+2(VO4)2(OH,F)2 |
8.CG.15 | Thometzekite | PbCu2+2(AsO4)2 · 2H2O |
8.CG.15 | Tsumcorite | PbZn2(AsO4)2 · 2H2O |
8.CG.15 | Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O |
8.CG.15 | Cabalzarite | CaMg2(AsO4)2 · 2H2O |
8.CG.15 | Krettnichite | PbMn3+2(VO4)2(OH)2 |
8.CG.15 | Cobalttsumcorite | PbCo2(AsO4)2 · 2H2O |
8.CG.15 | Nickellotharmeyerite | CaNi2(AsO4)2 · 2H2O |
8.CG.15 | Manganlotharmeyerite | CaMn3+2(AsO4)2(OH)2 |
8.CG.15 | Schneebergite | BiCo2(AsO4)2(OH) · H2O |
8.CG.15 | Nickelschneebergite | BiNi2(AsO4)2(OH) · H2O |
8.CG.15 | Yancowinnaite | PbCuAl(AsO4)2OH · H2O |
8.CG.15 | Nickeltsumcorite | Pb(Ni,Fe3+)2(AsO4)2(H2O,OH)2 |
8.CG.15 | Magnesiofluckite | CaMg(AsO3OH)2(H2O)2 |
8.CG.20 | Gartrellite | PbCuFe3+(AsO4)2(OH) · H2O |
8.CG.20 | Zincgartrellite | PbZn2(AsO4)2(H2O,OH)2 |
8.CG.20 | Rappoldite | PbCo2(AsO4)2 · 2H2O |
8.CG.20 | Phosphogartrellite | PbCuFe3+(PO4)2(OH,H2O)2 |
8.CG.20 | Lukrahnite | CaCuFe3+(AsO4)2(OH,H2O)2 |
8.CG.25 | Pottsite | (Pb3xBi4-2x)(VO4)4 · H2O (0.8 < x < 1.0) |
8.CG.25 | Armellinoite-(Ce) | Ca4Ce4+(AsO4)4 · H2O |
8.CG.35 | Nickeltalmessite | Ca2Ni(AsO4)2 · 2H2O |
8.CG.55 | Irhtemite | Ca4Mg(AsO4)2(HAsO4)2 · 4H2O |
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.
Internet Links for Helmutwinklerite
mindat.org URL:
https://www.mindat.org/min-1854.html
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References for Helmutwinklerite
Localities for Helmutwinklerite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
France | |
| www.mine-capgaronne.fr (2003) |
Greece | |
| |
Rieck (1999) | |
Namibia (TL) | |
| Süsse et al. (1983) |
Quick NavTopAbout HelmutwinkleriteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia