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Cerchiaraite

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Big Photo

Cerchiara Mine, Borghetto Vara, Vara Valley, La Spezia Province, Liguria, Italy
© G. Armellino

Show Cerchiaraite Photos (24)



Formula:
Ba
 
4
Mn
 
4
Si
 
6
(O,OH,Cl)
 
26
System:TetragonalColour:Deep green
Lustre:VitreousHardness:4 - 5
Name:From the type locality.
This page provides mineralogical data about Cerchiaraite.

Classification of Cerchiaraite

IMA status:Approved
Strunz 8th edition ID:8/E.08-15
Nickel-Strunz 10th (pending) edition ID:9.CF.25

9 : SILICATES (Germanates)
C : Cyclosilicates
F : [Si4O12]8- 4-membered single rings, with insular complex anions
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Type Occurrence of Cerchiaraite

Type Locality:Cerchiara Mine, Borghetto Vara, Vara Valley, La Spezia Province, Liguria, Italy

Physical Properties of Cerchiaraite

Lustre:Vitreous
Colour:Deep green
Streak:Pale green
Hardness (Mohs):4 - 5

Crystallography of Cerchiaraite

Crystal System:Tetragonal

Optical Data of Cerchiaraite

Type:Uniaxial (+)
RI values: nω = 1.745 nε = 1.765
Maximum Birefringence:δ = 0.020

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

Chemical Properties of Cerchiaraite

Formula:
Ba
 
4
Mn
 
4
Si
 
6
(O,OH,Cl)
 
26
Essential elements:Ba, Mn, O, Si
All elements listed in formula:Ba, Cl, H, Mn, O, Si

Relationship of Cerchiaraite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.CF.05Ashburtonite
Pb
 
4
Cu
 
4
(Si
 
4
O
 
12
)(HCO
 
3
)
 
4
(OH)
 
3
Cl · H
 
2
O
9.CF.10Kainosite-(Y)
Ca
 
2
(Y,Ce)
 
2
(Si
 
4
O
 
12
)(CO
 
3
) · H
 
2
O
9.CF.15Clinophosinaite
Na
 
12
(Ca,Sr)
 
4
(Si
 
4
O
 
12
)(PO
 
4
)
 
4
9.CF.15Phosinaite-(Ce)
Na
 
13
Ca
 
2
(Ce,La,Th,Nd,Pr)(Si
 
4
O
 
12
)(PO
 
4
)
 
4
9.CF.20Strakhovite
NaBa
 
3
(Mn,Mn)
 
4
Si
 
6
O
 
19
(OH)
 
3

Other Names for Cerchiaraite

Synonyms:
IMA1999-012
Other Languages:
German:Cerchiarait
Russian:Серчиараит
Spanish:Cerchiaraita

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 Cerchiaraite

Reference List:

- +
Basso R., Lucchetti G., Zefiro L., Palenzona A. (2000): Cerchiaraite, a new natural Ba-Mn-mixed-anion silicate chloride from the Cerchiara mine, northern Apennines, Italy. Neues Jahrbuch für Mineralogie, Monatschefte, 2000, 373-384.

Palenzona, A., Bulgarelli, G., Selmi, P. (2001): La cerchiaraite della miniera di Cerchiara. Rivista Mineralogica Italiana, 2001, 243-244.

Coombs, D.S., Kawachi, Y., Miura, H., Chapell, D. (2004): Cerchiaraite and Ca-bearing noélbensonite from Woods mine, New South Wales, Australia. European Journal of Mineralogy, 16, 185-189.

Internet Links for Cerchiaraite

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    • Localities for Cerchiaraite

    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.
    Hide Locality List
    (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.
    Australia
     
    • New South Wales
      • Darling Co.
        • Tamworth
    		Coombs, D.S., Kawachi, Y., Miura, H., Chapell, D. (2004): Cerchiaraite and Ca-bearing noélbensonite from Woods mine, New South Wales, Australia. European Journal of Mineralogy, 16, 185-189.
    Italy
     
    • Liguria
      • La Spezia Province
        • Vara Valley
          • Borghetto Vara
    		Basso R., Lucchetti G., Zefiro L., Palenzona A. (2000): Cerchiaraite, a new natural Ba-Mn-mixed-anion silicate chloride from the Cerchiara mine, northern Apennines, Italy. Neues Jahrbuch für Mineralogie, Monatschefte, 2000, 373-384. Palenzona, A., Bulgarelli, G., Selmi, P. (2001): La cerchiaraite della miniera di Cerchiara. Rivista Mineralogica Italiana, 2001, 243-244
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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