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Zincroselite

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Formula:
Ca
 
2
Zn(AsO
 
4
)
 
2
· 2H
 
2
O
System:MonoclinicColour:Colourless, white
Hardness:3
Member of:Roselite Group
Name:Named as the zinc-dominant analogue of Roselite.


Roselite Group. The zinc analogue of Roselite.

Classification of Zincroselite

IMA status:Approved 1985
Strunz 8th edition ID:7/C.17-120
Nickel-Strunz 10th (pending) edition ID: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 edition ID: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
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Type Occurrence of Zincroselite

Type Locality:Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia
Year of Discovery:1985

Physical Properties of Zincroselite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless, white
Hardness (Mohs):3

Crystallography of Zincroselite

Crystal System:Monoclinic
Cell Parameters:a = 5.83Å, b = 12.87Å, c = 5.64Å
β = 107.72°
Ratio:a:b:c = 0.453 : 1 : 0.438
Unit Cell Volume:V 403.10 ų (Calculated from Unit Cell)

Optical Data of Zincroselite

Type:Biaxial (+)
RI values: nα = 1.703 nβ = 1.710 nγ = 1.720
2V:Measured: 50° to 57°, Calculated: 82°
Maximum Birefringence:δ = 0.017

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v weak

Chemical Properties of Zincroselite

Formula:
Ca
 
2
Zn(AsO
 
4
)
 
2
· 2H
 
2
O
Simplified for copy/paste:Ca2Zn(AsO4)2·2H2O
Essential elements:As, Ca, H, O, Zn
All elements listed in formula:As, Ca, H, O, Zn

Relationship of Zincroselite to other Species

Member of:Roselite Group
Other Members of Group:

- +
Brandtite
Ca
 
2
(Mn
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
Kröhnkite
Na
 
2
Cu(SO
 
4
)
 
2
· 2H
 
2
O
Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
Rruffite
Ca
 
2
Cu(AsO
 
4
)
 
2
· 2H
 
2
O
Unnamed (Fe2+-analogue of Brandtite)
Ca
 
2
Fe
2+
 
(AsO
 
4
)
 
2
· 2H
 
2
O
Wendwilsonite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.CG.05Cassidyite
Ca
 
2
(Ni
2+
 
,Mg)(PO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Collinsite
Ca
 
2
(Mg,Fe
2+
 
)(PO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Fairfieldite
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)(PO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Gaitite
Ca
 
2
Zn(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Messelite
Ca
 
2
(Fe
2+
 
,Mn
2+
 
)(PO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Parabrandtite
Ca
 
2
Mn
2+
 
(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Talmessite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Hillite
Ca
 
2
(Zn,Mg)(PO
 
4
)
 
2
· 2 H
 
2
O
8.CG.10Brandtite
Ca
 
2
(Mn
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.10Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.10Wendwilsonite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.10Rruffite
Ca
 
2
Cu(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.15Ferrilotharmeyerite
Ca(Fe
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Lotharmeyerite
Ca(Zn,Mn
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Mawbyite
Pb(Fe
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Mounanaite
PbFe
3+
2
(VO
 
4
)
 
2
· 2(OH,F)
8.CG.15Thometzekite
Pb(Cu,Zn)
 
2
(AsO
 
4
,SO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Tsumcorite
Pb(Zn,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Cobaltlotharmeyerite
Ca(Co,Fe
3+
 
,Ni)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Cabalzarite
Ca(Mg,Al,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Krettnichite
(Pb,Sr)(Mn
3+
 
,Co)
 
2
(VO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Cobalttsumcorite
Pb(Co,Fe
3+
 
,Ni)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Nickellotharmeyerite
Ca(Ni,Fe
3+
 
,Co)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Manganlotharmeyerite
Ca(Mn
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Schneebergite
(Bi
3+
 
,Ca)(Co,Ni,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Nickelschneebergite
(Bi
3+
 
,Ca)(Ni,Co,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.20Gartrellite
Pb(Cu,Fe
3+
 
,Zn)
 
2
(AsO
 
4
,SO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.20Helmutwinklerite
Pb(Zn,Cu)
 
2
(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.20Zincgartrellite
Pb(Zn,Fe
3+
 
,Cu)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.20Rappoldite
Pb(Co,Ni,Zn)
 
2
(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.20Phosphogartrellite
Pb(Cu,Fe
3+
 
)
 
2
(PO
 
4
,AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.20Lukrahnite
Ca(Cu,Zn)(Fe
3+
 
,Zn)(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.25Pottsite
HPbBi(VO
 
4
)
 
2
· 2H
 
2
O
8.CG.35Nickeltalmessite
Ca
 
2
Ni(AsO
 
4
)
 
2
· 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
20.3.1Adamite
Zn
 
2
(AsO
 
4
)(OH)
20.3.2Paradamite
Zn
 
2
(AsO
 
4
)(OH)
20.3.3Koritnigite
Zn(HAsO
 
4
) · H
 
2
O
20.3.4Legrandite
Zn
 
2
(AsO
 
4
)(OH) · H
 
2
O
20.3.5Warikahnite
Zn
 
3
(AsO
 
4
)
 
2
· 2H
 
2
O
20.3.6Köttigite
Zn
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.3.7Stranskiite
Zn
 
2
Cu(AsO
 
4
)
 
2
20.3.8Philipsburgite
(Cu,Zn)
 
6
(AsO
 
4
,PO
 
4
)
 
2
(OH)
 
6
· H
 
2
O
20.3.9Austinite
CaZn(AsO
 
4
)(OH)
20.3.10Prosperite
CaZn
 
2
(AsO
 
4
)(HAsO
 
4
)(OH)
20.3.11Gaitite
Ca
 
2
Zn(AsO
 
4
)
 
2
· 2H
 
2
O
20.3.13O'Danielite
Na(Zn,Mg)
 
3
H
 
2
(AsO
 
4
)
 
3
20.3.14Johillerite
Na(Mg,Zn)
 
3
Cu(AsO
 
4
)
 
3
20.3.15Holdenite
(Mn
2+
 
,Mg)
 
6
Zn
 
3
(AsO
 
4
)
 
2
(SiO
 
4
)(OH)
 
8
20.3.16Chudobaite
(Mg,Zn)
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 10H
 
2
O
20.3.17Chlorophoenicite
(Mn,Mg)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
20.3.18Lotharmeyerite
Ca(Zn,Mn
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
20.3.19Metaköttigite
(Zn,Fe,Fe)
 
3
(AsO
 
4
)
 
2
· 8(H
 
2
O,OH)
20.3.20Ojuelaite
ZnFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
20.3.21Fahleite
Zn
 
5
CaFe
 
2
(AsO
 
4
)
 
6
· 14H
 
2
O
20.3.22Keyite
Cu
2+
3
Zn
 
4
Cd
 
2
(AsO
 
4
)
 
6
· 2H
 
2
O

Other Names for Zincroselite

Synonyms:
IMA1985-055
Other Languages:
German:Zincroselit
Zinkroselith
Russian:Цинкрозелит
Spanish:Zincroselita

Other Information

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

References for Zincroselite

Reference List:

- +
Keller, P., Innes, J. & Dunn, P. J. (1986) Zincroselite, Ca2Zn(AsO4)2•2H2O, a new mineral from Tsumeb, Namibia. Neues Jahrbuch für Mineralogie, Monatshefte (1986): (11): 523-527.

American Mineralogist (1988): 73: 932.

Internet Links for Zincroselite

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  • Raman and XRD data at RRUFF project
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  • Localities for Zincroselite

    The 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.
    (TL) indicates type locality. ? 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.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
    S. Weiß: Lapis 31(7/8), 72-73 (2006)
    Namibia
     
    • Otjikoto Region (Oshikoto)
      • Tsumeb
    Keller, P., Innes, J. & Dunn, P. J. (1986) Zincroselite, Ca2Zn(AsO4)2•2H2O, a new mineral from Tsumeb, Namibia. Neues Jahrbuch für Mineralogie, Monatshefte (1986): (11): 523-527; American Mineralogist (1988): 73: 932; Keller, P. & Innes, J. (1986): "Neue Minerale von Tsumeb." Lapis, 11 (9), 28-32.
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