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Zincroselite

A valid IMA mineral species
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00077950017271927762393.jpg
Zincroselite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
00077950017271927762393.jpg
Zincroselite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
00077950017271927762393.jpg
Zincroselite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
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About ZincroseliteHide

Formula:
Ca2Zn(AsO4)2 · 2H2O
Colour:
Colourless, white
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
3.75
Crystal System:
Monoclinic
Name:
Named as the zinc-dominant analogue of Roselite.
Dimorph of:
Gaitite
The zinc analogue of Roselite.



Unique IdentifiersHide

Mindat ID:
4415
Long-form identifier:
mindat:1:1:4415:4

IMA Classification of ZincroseliteHide

Classification of ZincroseliteHide

Strunz-mindat (2026):
8.CG.10

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.:
40.2.3.3

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
Hey's CIM Ref.:
20.3.12

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

Pronunciation of ZincroseliteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of ZincroseliteHide

Lustre:
Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless, white
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
{010}, good to perfect; {001}, traces.
Density:
3.75 g/cm3 (Measured)    3.77 g/cm3 (Calculated)

Optical Data of ZincroseliteHide

Type:
Biaxial (+)
RI values:
nα = 1.703(3) nβ = 1.710(4) nγ = 1.720(3)
2V:
Measured: 50° to 57°, Calculated: 57°
Max. Birefringence:
δ = 0.017
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Moderate
Dispersion:
Strong, r < v.
Optical Extinction:
Y = b; X ∧ c = 0°-5°.

Chemistry of ZincroseliteHide

Mindat Formula:
Ca2Zn(AsO4)2 · 2H2O
Element Weights:
Element% weight
O34.826 %
As32.617 %
Ca17.448 %
Zn14.232 %
H0.878 %

Calculated from ideal end-member formula.
Elements listed:
As, Ca, H, O, Zn - search for minerals with similar chemistry

Crystallography of ZincroseliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 5.832(2) Å, b = 12.889(4) Å, c = 5.644(2) Å
β = 107.72(3)°
Ratio:
a:b:c = 0.452 : 1 : 0.438
Unit Cell V:
404.12 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Lathlike crystals, elongate and strongly striated [001].
Twinning:
Common on {100}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0007062ZincroseliteKeller 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
3.00 Å(100)
3.22 Å(80)
2.78 Å(80)
5.10 Å(60)
6.44 Å(50)
3.40 Å(50)
3.36 Å(50)
Comments:
Tsumeb mine, Namibia. The data are 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 ZincroseliteHide

Type Locality:
ⓘ Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia
General Appearance of Type Material:
Aggregates, up to 12 x 5 x 4 mm, consisting of intergrown lathlike crystals.
Place of Conservation of Type Material:
University of Stuttgart, Stuttgart, Germany, NMI6; National Museum of Natural History, Washington, D.C., USA, 163340.
Geological Setting of Type Material:
In oxidized copper ore.
Associated Minerals at Type Locality:
LeiteiteQuartzStranskiiteTennantite SubgroupTsumcorite
Reference:
Keller, Paul, Innes, J., Dunn, Pete J. (1986) Zincroselite, Ca2Zn(AsO4)2•2H2O, a new mineral from Tsumeb, Namibia. Neues Jahrbuch für Mineralogie - Monatshefte, 1986 (11) 523-527

Synonyms of ZincroseliteHide

Other Language Names for ZincroseliteHide

Relationship of Zincroselite to other SpeciesHide

Member of:
Brandtite Group > Kröhnkite Supergroup
Other Members of Brandtite Group:
BrandtiteCa2Mn2+(AsO4)2 · 2H2OMon. 2/m : P21/b
DobšináiteCa2Ca(AsO4)2 · 2H2OMon. 2/m : P21/b
KröhnkiteNa2Cu(SO4)2 · 2H2OMon. 2/m : P21/b
RoseliteCa2Co(AsO4)2 · 2H2OMon. 2/m : P21/b
RruffiteCa2Cu(AsO4)2 · 2H2OMon. 2/m : P21/b
WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b

Related Minerals - Strunz-mindat GroupingHide

8.CG.FluckiteCaMn2+(AsO3OH)2 · 2H2OTric. 1 : P1
8.CG.DondoelliteCa2Fe(PO4)2 · 2H2OTric. 1 : P1
8.CG.'Ca-Huréaulite'CaMn5(PO4)4 · 4H2O
8.CG.AlumolukrahniteCa[CuAl](AsO4)2(H2O,OH)2Tric. 1 : P1
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
8.CG.05MesseliteCa2Fe2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05AnorthoroseliteCa2Co(AsO4)2 · 2H2OTric.
8.CG.05CassidyiteCa2Ni(PO4)2 · 2H2OTric.
8.CG.05FairfielditeCa2Mn2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05HilliteCa2Zn(PO4)2 · 2H2OTric. 1 : P1
8.CG.05'Unnamed (Fe2+-analogue of Parabrandtite)'Ca2Fe2+(AsO4)2 · 2H2O
8.CG.10RoseliteCa2Co(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10BrandtiteCa2Mn2+(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10'Unnamed (Fe2+-analogue of Brandtite)'Ca2Fe2+(AsO4)2 · 2H2O
8.CG.15MawbyitePbFe3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15ThometzekitePbCu2+2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15YancowinnaitePbCuAl(AsO4)2OH · H2O Tric. 1 : P1
8.CG.15SchneebergiteBiCo2(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15CabalzariteCaMg2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15NickelschneebergiteBiNi2(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15LotharmeyeriteCaZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
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.15KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
8.CG.15CobalttsumcoritePbCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15FerrilotharmeyeriteCaZnFe3+(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15CobaltlotharmeyeriteCaCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15MounanaitePbFe3+2(VO4)2(OH)2Mon. 2/m : B2/m
8.CG.15NickellotharmeyeriteCaNi2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.20LukrahniteCaCuFe3+(AsO4)2(OH,H2O)2Tric. 1 : P1
8.CG.20HelmutwinkleritePbZn2(AsO4)2 · 2H2OTric. 1 : P1
8.CG.20PhosphogartrellitePbCuFe3+(PO4)2(OH,H2O)2Tric. 1 : P1
8.CG.20GartrellitePbCuFe3+(AsO4)2(OH) · H2OTric. 1 : P1
8.CG.20ZincgartrellitePbZn2(AsO4)2(H2O,OH)2Tric. 1 : P1
8.CG.20RappolditePbCo2(AsO4)2 · 2H2OTric. 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 ZincroseliteHide

In UV light:
Not fluorescent.

Other InformationHide

Notes:
Soluble in HNO3.
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 ZincroseliteHide

References for ZincroseliteHide

Localities for ZincroseliteHide

Showing 2 localities.

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.
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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.
Morocco
 
  • Drâa-Tafilalet Region
Weiß (2006)
Namibia (TL)
 
  • Oshikoto Region
    • Tsumeb
Keller et al. (1986) +2 other references
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