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Calciopetersite

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Formula:
CaCu6(PO4)2(PO3OH)(OH)6 · 3H2O
System:
Hexagonal
Colour:
Olive green
Member of:
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

Approved 2001
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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First Recorded Occurrence of Calciopetersite

General Appearance of First Recorded 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 First Recorded Material:
cavities in weathered, copper sulphide bearing quartz veins

Physical Properties of Calciopetersite

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

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 Data:
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
Max Birefringence:
δ = 0.076
Image 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:
CaCu6(PO4)2(PO3OH)(OH)6 · 3H2O
Essential elements:
All elements listed in formula:
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:
(Ca0.58Y0.13Ce0.11Nd0.08La0.04K0.02Dy0.02Pr0.01Yb0.01)Σ1.00 (Cu5.90Ca0.14)Σ6.04 [(PO4)2.06(HPO4)0.65(AsO4)0.22(SiO4)0.22(OH)6] · 3.00H2O

Relationship of Calciopetersite to other Species

Member of:
Other Members of Group:
Agardite-(Ce)CeCu6(AsO4)3(OH)6 · 3H2O
Agardite-(Dy)(Dy,La)Cu6(AsO4)3(OH)6 · 3H2O
Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2O
Agardite-(Nd)NdCu6(AsO4)3(OH)6 · 3H2O
Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2O
GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2O
MixiteBiCu6(AsO4)3(OH)6 · 3H2O
Petersite-(Ce)Cu6Ce(PO4)3(OH)6·3H2O
Petersite-(Y)(Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O
Plumboagardite(Pb,REE,Ca)Cu6(AsO4)2(HAsO4,AsO4)(OH)6 · 3H2O
ZálesíiteCaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O
8.DL.05FoggiteCaAl(PO4)(OH)2 · H2O
8.DL.10CyriloviteNaFe33+(PO4)2(OH)4 · 2H2O
8.DL.10Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
8.DL.10WarditeNaAl3(PO4)2(OH)4 · 2H2O
8.DL.15Agardite-(Nd)NdCu6(AsO4)3(OH)6 · 3H2O
8.DL.15Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2O
8.DL.15Agardite-(Ce)CeCu6(AsO4)3(OH)6 · 3H2O
8.DL.15Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2O
8.DL.15GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2O
8.DL.15MixiteBiCu6(AsO4)3(OH)6 · 3H2O
8.DL.15Petersite-(Y)(Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O
8.DL.15ZálesíiteCaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O
8.DL.15Plumboagardite(Pb,REE,Ca)Cu6(AsO4)2(HAsO4,AsO4)(OH)6 · 3H2O
8.DL.20CheremnykhitePb3Zn3(VO4)2(TeO6)
8.DL.20DugganitePb3Zn3(AsO4)2(TeO6)
8.DL.20KuksitePb3Zn3(PO4)2(TeO6)
8.DL.20Wallkilldellite-(Mn)Ca2Mn32+(AsO4)2(OH)4 · 9H2O
8.DL.20Wallkilldellite-(Fe)(Ca,Cu)4Fe62+(AsO4,SiO4)4(OH,O)8 · 18H2O
8.DL.25AngastoniteCaMgAl2(PO4)2(OH)4 · 7H2O

Other Names for Calciopetersite

Name in Other Languages:
Simplified Chinese:羟水磷钙铜石
Traditional Chinese:羥水磷鈣銅石

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 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

Localities for Calciopetersite

(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.
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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