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Calciopetersite

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Formula:
CaCu
 
6
(PO
 
4
)
 
2
(HPO
 
4
)(OH)
 
6
· 3H
 
2
O
System:HexagonalColour:Olive green
Member of:Mixite Group
Name:For the chemical composition and its relationship with Petersite.


Mixite Group.
The phosphate analogue of zálesíite, and the Ca analogue of petersite-(Y).

Classification of Calciopetersite

IMA status:Approved 2001
Strunz 8th edition ID:7/D.53-05
Nickel-Strunz 10th (pending) edition ID:8.DL.15

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
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Type Occurrence of Calciopetersite

Type Locality:Domašov nad Bystřicí (Domstadtl), Sternberk (Sternberg), Olomouc Region, Moravia (Mähren; Maehren), Czech Republic
General Appearance of Type Material:minute acicular crystals with a hexagonal outline, up to 0.4 mm in length and 5–20 µm in width, clustered in fine radiating sprays up to 0.1 × 0.5 mm in size
Geological Setting of type material:cavities in weathered, copper sulphide bearing quartz veins
Associated Minerals at type locality:
QuartzPyriteMalachiteLepidocrociteGoethite
CovelliteChrysocollaChalcopyriteChalcociteAllophane

Physical Properties of Calciopetersite

Lustre:Vitreous
Colour:Olive green
Streak:Light olive green
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (calculated):3.332 g/cm3

Crystallography of Calciopetersite

Crystal System:Hexagonal
Class (H-M):6/m - Dipyramidal
Space Group:P63/m
Cell Parameters:a = 13.284Å, c = 5.902Å
Ratio:a:c = 1 : 0.444
Unit Cell Volume:V 902 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
11.51 (100)
4.346 (88)
4.140 (46)
3.837 (38)
3.321 (44)
2.888 (53)
2.877 (37)
2.510 (37)
Comments:Format: d/Å I/% (hkl)

Optical Data of Calciopetersite

Type:Uniaxial (+)
RI values: nω = 1.674 nε = 1.750
Maximum Birefringence:δ = 0.076

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Comments:O light green with yellowish tint, E green

Chemical Properties of Calciopetersite

Formula:
CaCu
 
6
(PO
 
4
)
 
2
(HPO
 
4
)(OH)
 
6
· 3H
 
2
O
Simplified for copy/paste:CaCu6(PO4)2(HPO4)(OH)6·3H2O
Essential elements:Ca, Cu, H, O, P
All elements listed in formula:Ca, Cu, H, O, P
Analytical Data:Empirical formula based on 21 atoms per formula unit
K2O (0.09)
CaO (4.39)
CuO  (51.25)
Y2O3 (1.61)
La2O3 (0.64)
Ce2O3 (1.98)
Pr2O3 (0.25)
Nd2O3 (1.40)
Dy2O3 (0.33)
Yb2O3 (0.21)
Bi2O3 (0.09)
SiO2 (0.52)
P2O5 (20.98)
As2O5 (2.70)
H2O (12.45)

total 98.89 wt.%
Empirical Formula:
(Ca
 
0.58
Y
 
0.13
Ce
 
0.11
Nd
 
0.08
La
 
0.04
K
 
0.02
Dy
 
0.02
Pr
 
0.01
Yb
 
0.01
)Σ1.00 (Cu
 
5.90
Ca
 
0.14
)Σ6.04 [(PO
 
4
)
 
2.06
(HPO
 
4
)
 
0.65
(AsO
 
4
)
 
0.22
(SiO
 
4
)
 
0.22
(OH)
 
6
] · 3.00H
 
2
O

Relationship of Calciopetersite to other Species

Member of:Mixite Group
Other Members of Group:

- +
Agardite-(Ce)
CeCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
Agardite-(Dy)
(Dy,La)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
Agardite-(La)
(La,Ce)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
Agardite-(Nd)
NdCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
Agardite-(Y)
(Y,Ca)Cu
 
6
(AsO
 
4
)
 
2
(AsO
 
4
,HAsO
 
4
)(OH)
 
6
· 3H
 
2
O
Goudeyite
(Al,Y)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
Mixite
BiCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
Petersite-(Ce)
Cu
 
6
Ce(PO
 
4
)
 
3
(OH)
 
6
·3H
 
2
O
Petersite-(Y)
(Y,Ce,Nd)Cu
 
6
(PO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
Plumboagardite
(Pb,REE,Ca)Cu
 
6
(AsO
 
4
)
 
2
(HAsO
 
4
,AsO
 
4
)(OH)
 
6
· 3H
 
2
O
Zálesíite
(Ca,Y)Cu
 
6
(AsO
 
4
)
 
2
(HAsO
 
4
,AsO
 
4
)(OH)
 
6
· 3H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.DL.05Foggite
CaAl(PO
 
4
)(OH)
 
2
· H
 
2
O
8.DL.10Cyrilovite
NaFe
3+
3
(PO
 
4
)
 
2
(OH)
 
4
· 2H
 
2
O
8.DL.10Millisite
(Na,K)CaAl
 
6
(PO
 
4
)
 
4
(OH)
 
9
· 3H
 
2
O
8.DL.10Wardite
NaAl
 
3
(PO
 
4
)
 
2
(OH)
 
4
· 2H
 
2
O
8.DL.15Agardite-(Nd)
NdCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
8.DL.15Agardite-(Y)
(Y,Ca)Cu
 
6
(AsO
 
4
)
 
2
(AsO
 
4
,HAsO
 
4
)(OH)
 
6
· 3H
 
2
O
8.DL.15Agardite-(Ce)
CeCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
8.DL.15Agardite-(La)
(La,Ce)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
8.DL.15Goudeyite
(Al,Y)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
8.DL.15Mixite
BiCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
8.DL.15Petersite-(Y)
(Y,Ce,Nd)Cu
 
6
(PO
 
4
)
 
3
(OH)
 
6
· 3H
 
2
O
8.DL.15Zálesíite
(Ca,Y)Cu
 
6
(AsO
 
4
)
 
2
(HAsO
 
4
,AsO
 
4
)(OH)
 
6
· 3H
 
2
O
8.DL.15Plumboagardite
(Pb,REE,Ca)Cu
 
6
(AsO
 
4
)
 
2
(HAsO
 
4
,AsO
 
4
)(OH)
 
6
· 3H
 
2
O
8.DL.20Cheremnykhite
Pb
 
3
Zn
 
3
(VO
 
4
)
 
2
(TeO
 
6
)
8.DL.20Dugganite
Pb
 
3
Zn
 
3
(AsO
 
4
)
 
2
(TeO
 
6
)
8.DL.20Kuksite
Pb
 
3
Zn
 
3
(PO
 
4
)
 
2
(TeO
 
6
)
8.DL.20Wallkilldellite-(Mn)
Ca
 
2
Mn
2+
3
(AsO
 
4
)
 
2
(OH)
 
4
· 9H
 
2
O
8.DL.20Wallkilldellite-(Fe)
(Ca,Cu)
 
4
Fe
2+
6
(AsO
 
4
,SiO
 
4
)
 
4
(OH,O)
 
8
· 18H
 
2
O
8.DL.25Angastonite
CaMgAl
 
2
(PO
 
4
)
 
2
(OH)
 
4
· 7H
 
2
O

Other Names for Calciopetersite

Synonyms:
IMA2001-004
Other Languages:
Simplified Chinese:羟水磷钙铜石
Traditional Chinese:羥水磷鈣銅石

Other Information

Fluorescence in UV light:none
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 Calciopetersite

Reference List:

- +
Kolitsch, Uwe (1997): Das Ca-Analogon von Petersit und einige weitere Neufunde aus dem sächsisch-böhmischen Erzgebirge und dem Vogtland. Mineralien-Welt 8 (4), 17-20.

Sejkora, J., Novotný, P., Novák, M., Šrein, V., Berlepsch, P. (2005): Calciopetersite from Domašov nad Bystricí, northern Moravia, Czech Republic, a new mineral species of the mixite group. Canadian Mineralogist, 43, 1393-1400.

Biagioni, C., Bonaccorsi, E., Orlandi, P. (2011): Occurrence and crystal structure of calciopetersite from Monte Beni (Firenzuola, Florence, Tuscany, Italy). Atti della Società Toscana di Scienze Naturali, Memorie, 116, 17-22.

Internet Links for Calciopetersite

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

    (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.
    Czech Republic
     
    • Moravia (Mähren; Maehren)
      • Olomouc Region
        • Sternberk (Sternberg)
    J. Sejkora et al.: Can. Min. 43:1393-1400 (2005); Jiří Čejka, Jiří Sejkora, Jakub Plášil, Eloise C. Keeffe, Silmarilly Bahfenne, Sara J. Palmer and Ray L. Frost (2011): A Raman and infrared spectroscopic study of Ca2+ dominant members of the mixite group from the Czech Republic. Journal of Raman Spectroscopy 42, 1154-1159.
    Germany
     
    • Saxony
      • Erzgebirge
        • Clausnitz - Sayda District
          • Sayda
    Kolitsch, U. (1997): Das Ca-Analogon von Petersit und einige weitere Neufunde aus dem sächsisch-böhmischen Erzgebirge und dem Vogtland. Mineralien-Welt 8 (4), 17-20.
    Italy
     
    • Tuscany
      • Florence Province
        • Firenzuola
          • Monte Beni
    Biagioni, C., Bonaccorsi, E., Orlandi, P. (2011): Occurrence and crystal structure of calciopetersite from Monte Beni (Firenzuola, Florence, Tuscany, Italy). Atti della Società Toscana di Scienze Naturali, Memorie, 116, 17-22.; Bardi, T., Becucci, A. & Biagioni, C. (2012): Monte Beni - I minerali dell'ex cava Fantoni (Pietramala, Firenzuola, Firenze). MICRO, 3/2012, 98-109.
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