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Caracolite

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Formula:
Na3Pb2(SO4)3Cl
System:
Monoclinic
Colour:
Colourless, grayish, ...
Hardness:
Name:
After Caracoles, a town near the type locality of the Beatriz Mine, Sierra Gorda, Atacama, Chile.
This page provides mineralogical data about Caracolite.

Classification of Caracolite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
7.BD.20

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
30.3.2.1

30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
3 : (AB)5(XO4)3Zq
26.25

26 : Sulphates with Halide
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First Recorded Occurrence of Caracolite

General Appearance of First Recorded Material:
Crystalline incrustations with pseudohexagonal crystals to 1mm.
Year of Discovery:
1886
Associated Minerals at First Recorded Locality:

Physical Properties of Caracolite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, grayish, greenish stained; colourless in transmitted light.
Hardness (Mohs):
Cleavage:
None Observed
Density:
5.1 g/cm3 (Measured)    
Comment:
Measured density approximate.

Crystallography of Caracolite

Crystal System:
Monoclinic
Cell Parameters:
a = 19.62Å, b = 7.14Å, c = 9.81Å
β = 120°
Ratio:
a:b:c = 2.748 : 1 : 1.374
Unit Cell Volume:
V 1,190.14 ų (Calculated from Unit Cell)
Morphology:
Occurs as crystalline incrustations. Imperfect crystals to 1 mm apparently hexagonal with a hexagonal pyramid and prism plus a large base.
Twinning:
Pseudo-hexagonal trillings, analogous to aragonite. Exhibits complex polysynthetic twinning with rather large extinction angles.
X-Ray Powder Diffraction Data:
d-spacingIntensity
8.45 (31)
4.03 (31)
3.55 (55)
2.927 (100)
2.876 (45)
2.132 (35)
1.906 (56)

Optical Data of Caracolite

Type:
Biaxial (-)
RI values:
nα = 1.743 nβ = 1.754 nγ = 1.764
Max Birefringence:
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v moderate

Chemical Properties of Caracolite

Formula:
Na3Pb2(SO4)3Cl
Essential elements:
All elements listed in formula:

Relationship of Caracolite to other Species

Other Members of Group:
AiolositeNa4Bi(SO4)3Cl
CesaniteNa3Ca2(SO4)3(OH)
FluorphosphohedyphaneCa2Pb3(PO4)3F
HedyphanePb3Ca2(AsO4)3Cl
MorelanditeCa2Ba3(AsO4)3Cl
PhosphohedyphaneCa2Pb3(PO4)3Cl
7.BD.05SulphohaliteNa6(SO4)2FCl
7.BD.05Sulfohalite
7.BD.10GaleiteNa15(SO4)5F4Cl
7.BD.10SchaireriteNa3(SO4)(F,Cl)
7.BD.15KogarkoiteNa3(SO4)F
7.BD.20CesaniteNa3Ca2(SO4)3(OH)
7.BD.20AiolositeNa4Bi(SO4)3Cl
7.BD.25BurkeiteNa6(CO3)(SO4)2
7.BD.30HanksiteNa22K(SO4)9(CO3)2Cl
7.BD.35CannoniteBi2(SO4)O(OH)2
7.BD.40LanarkitePb2(SO4)O
7.BD.45GrandreefitePb2(SO4)F2
7.BD.50ItoitePb3Ge4+(SO4)2O2(OH)2
7.BD.55ChiluiteBi3Te6+Mo6+O10.5
7.BD.60HectorfloresiteNa9(SO4)4(IO3)
7.BD.65PseudograndreefitePb6(SO4)F10
7.BD.70SundiusitePb10(SO4)O8Cl2
26.1KogarkoiteNa3(SO4)F
26.2SulphohaliteNa6(SO4)2FCl
26.3SchaireriteNa3(SO4)(F,Cl)
26.4GaleiteNa15(SO4)5F4Cl
26.5ConnelliteCu19(SO4)(OH)32Cl4 · 3H2O
26.6ChlorothioniteK2Cu(SO4)Cl2
26.7KamchatkiteKCu3(SO4)2OCl
26.8SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
26.9AubertiteCuAl(SO4)2Cl · 14H2O
26.10Magnesioaubertite(Mg,Cu)Al(SO4)2Cl · 14H2O
26.11Svyazhinite(Mg,Mn2+,Ca)(Al,Fe3+)(SO4)2F · 14H2O
26.12D'AnsiteNa21Mg(SO4)10Cl3
26.13AnhydrokainiteKMg(SO4)Cl
26.14KainiteKMg(SO4)Cl · 3H2O
26.15Mosesite(Hg2N)(Cl,SO4,MoO4) · H2O
26.16Kleinite(Hg2N)(Cl,SO4) · nH2O
26.17WilcoxiteMgAl(SO4)2F · 17H2O
26.18CreediteCa3SO4Al2F8(OH)2 · 2H2O
26.19LannoniteMg2Ca4Al4(SO4)8F8 · 24H2O
26.20Chukhrovite-(Y)Ca3(Y,Ce)[F|SO4|(AlF6)2] · 10H2O
26.21Chukhrovite-(Ce)Ca3(Ce,Y)[F|SO4|(AlF6)2] · 10H2O
26.22GrandreefitePb2(SO4)F2
26.23PseudograndreefitePb6(SO4)F10
26.24SundiusitePb10(SO4)O8Cl2
26.26MammothitePb6Cu4AlSb5+O2(OH)16Cl4(SO4)2
26.27AtlasoviteK(BiO)Cu6Fe3+(SO4)5O3Cl
26.28XitieshaniteFe3+(SO4)Cl · 6H2O
26.29NabokoiteKCu7(SO4)5(Te4+O3)OCl

Other Names for Caracolite

Name in Other Languages:
German:Caracolit
Simplified Chinese:氯铅芒硝
Spanish:Caracolita

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 Caracolite

Reference List:
Websky (1886) Sitzungsberichte der Akademie der Wissenschaften, Berlin: 1045.

Fletcher (1889) Mineralogical Magazine: 8: 172.

Goldschmidt, V. (1913) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 2: 2: 104.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 52.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 546-547.

Neues Jahrbuch für Mineralogie, Monatshefte (1969): 58-64.

Internet Links for Caracolite

Localities for Caracolite

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 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.
Chile
 
  • Antofagasta Region
    • Antofagasta Province
      • Sierra Gorda District
        • Caracoles
Periodico di Mineralogia 54 (1985), 34; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 82, 547.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 75.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 75.
Collection U. Kolitsch (gift from Arturo Molina)
Vajdak, Josef (2006) Mineral News: 22: 11; U. Kolitsch collection.
  • Tarapacá Region
    • El Tamarugal Province
      • Challacollo
Tim Jokela Jr
Schluter, J., Pohl, D., & Britvin, S. (2005). The new mineral challacolloite, KPb2Cl5, the natural occurrence of a technically known laser material. Neues Jahrbuch für Mineralogie-Abhandlungen, 182(1), 95-101.
China
 
  • Xinjiang Autonomous Region
    • Tulufan Prefecture (Turfan Prefecture; Turpan Prefecture)
      • Shanshan Co. (Piqan Co.; Pichan Co.)
        • Kanggur-Xifengshan gold belt
Kaiyin Bai and Zhaoxin Han (2007): Northwestern Geology 40(2), 114-117
Germany
 
  • North Rhine-Westphalia
    • Ruhr Coal Mining area
      • Marl
        • Marl-Hüls
Weiss: "Mineralfundstellen, Deutschland West", 1990
Ukraine
 
  • Zhytomyr Oblast' (Zhitomir Oblast')
Lyckberg, P., Chornousenko, V. & Wilson, W. E. (2009): Volodarsk-Volynski, Zhitomir Oblast, Ukraine. Mineralogical Record, 40, 473-506.
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