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Cerchiaraite-(Fe)

A valid IMA mineral species
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02627220017123827475889.jpg
Cerchiaraite-(Fe), etc.

Gun claim, Wilson Lake, Itsi Mountain, Watson Lake mining district, Yukon, Canada
05734850014947706667021.jpg
Cerchiaraite-(Fe)

Cerchiara Mine, Borghetto di Vara, La Spezia Province, Liguria, Italy
07246610014947706668407.jpg
Cerchiaraite-(Fe)

Cerchiara Mine, Borghetto di Vara, La Spezia Province, Liguria, Italy
04053250017056403371003.jpg
Cerchiaraite-(Fe), etc.

Gun claim, Wilson Lake, Itsi Mountain, Watson Lake mining district, Yukon, Canada
05734850014947706667021.jpg
Cerchiaraite-(Fe)

Cerchiara Mine, Borghetto di Vara, La Spezia Province, Liguria, Italy
07246610014947706668407.jpg
Cerchiaraite-(Fe)

Cerchiara Mine, Borghetto di Vara, La Spezia Province, Liguria, Italy
02627220017123827475889.jpg
Cerchiaraite-(Fe), etc.

Gun claim, Wilson Lake, Itsi Mountain, Watson Lake mining district, Yukon, Canada
05734850014947706667021.jpg
Cerchiaraite-(Fe)

Cerchiara Mine, Borghetto di Vara, La Spezia Province, Liguria, Italy
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About Cerchiaraite-(Fe)Hide

Formula:
Ba4Fe3+4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl
Colour:
tan to brown; blue to bluish-green
Lustre:
Vitreous
Hardness:
4½
Specific Gravity:
3.710 (Calculated)
Crystal System:
Tetragonal
Name:
to address the mineral relation with "cerchiaraite" (now cerchiaraite-(Mn))
The Fe analogue of cerchiaraite-(Mn) (ex-cerchiaraite) and cerchiaraite-(Al). Chemically similar to fencooperite, and somewhat to traskite and hyttsjöite.

The structure details (1) corner-sharing silicate tetrahedra, forming 4-membered rings; (2) the rings share corners with an edge-sharing chain of Fe3+O6 octahedra || c; (3) the rings alternate with Cl sites alternates along c; (4) large channels in the framework host Ba around
their peripheries, statistically distributed Si2O3(OH)4 dimers, and Cl atoms.


Unique IdentifiersHide

Mindat ID:
42784
Long-form identifier:
mindat:1:1:42784:1
GUID
(UUID V4):
c7a24bdc-1e0d-4d05-a03d-0c109300c315

IMA Classification of Cerchiaraite-(Fe)Hide

Classification of Cerchiaraite-(Fe)Hide

Strunz-mindat (2024):
9.CF.25

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
Ccr-FeIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Cerchiaraite-(Fe)Hide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
tan to brown; blue to bluish-green
Comment:
tan/brown: Cerchiara; blue/bluish-green: California
Streak:
colorless to tan (Cerchiara), pale green-blue (California)
Hardness:
4½ on Mohs scale
Comment:
ca. 4.5
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.710 g/cm3 (Calculated)
Comment:
couldn't be measured due to fibrous habit

Optical Data of Cerchiaraite-(Fe)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.741(2) nε = 1.768(2)
Max Birefringence:
δ = 0.027
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Weak
Comments:
colorless (O), yellow (E), O < E

Chemistry of Cerchiaraite-(Fe)Hide

Mindat Formula:
Ba4Fe3+4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl
Elements listed:
Ba, Cl, Fe, H, O, Si - search for minerals with similar chemistry
Common Impurities:
Ti,Al

Crystallography of Cerchiaraite-(Fe)Hide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I4/mmm
Cell Parameters:
a = 14.3354(19) Å, c = 6.0151(8) Å
Ratio:
a:c = 1 : 0.42
Unit Cell V:
1230.6 ų
Z:
2

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0019795Cerchiaraite-(Fe)Kampf A R, Roberts A C, Venance K E, Carbone C, Belmonte D, Dunning G E, Walstrom R E (2013) Cerchiaraite-(Fe) and cerchiaraite-(Al), two new barium cyclosilicate chlorides from Italy and California, USA Mineralogical Magazine 77 69-802013Esquire No. 8 claim, Big Creek, Fresno County, California, USA0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.403 Å(26)
3.327 Å(48)
3.016 Å(70)
2.595 Å(100)
2.258 Å(29)
1.812 Å(39)
1.411 Å(43)
1.298 Å(29)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)
Geological Setting:
quartz-sanbomite vein assemblages resulting from fluid interaction along the margin of the vein (Esquire #7 and #8 claims)

Type Occurrence of Cerchiaraite-(Fe)Hide

Co-Type Localities:
ⓘ Cerchiara Mine, Borghetto di Vara, La Spezia Province, Liguria, Italy
ⓘ Esquire No. 7 claim, Big Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA
ⓘ Esquire No. 8 claim, Big Creek, Big Creek-Rush Creek Mining District, Fresno County, California, USA
General Appearance of Type Material:
thin prisms and matted fibers (Italy); irregular prisms in subparallel crystal aggregates, generally less than 1 mm across (California, USA)
Place of Conservation of Type Material:
Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue numbers 63515, 63516, 63517 and 63518
Geological Setting of Type Material:
small fractures and veinlets within metacherts of a Jurassic ophiolitic sequence; genesis: re-equilibration of the ophiolitic sequences during tectonometamorphic overprinting, aged ca. 80 Ma, in prehnite-pumpellyite facies conditions (2–3kB, 250–300oC)
Associated Minerals at Type Locality:
SchefferiteQuartzNorrishiteHematiteFeldspar Group
CalciteAegirine
Reference:
Kampf, A.R., Roberts, A.C., Venance, K.E., Carbone, C., Belmonte, D., Dunning, G.E., Walstrom, R.E. (2013) Cerchiaraite-(Fe) and cerchiaraite-(Al), two new barium cyclosilicate chlorides from Italy and California, USA. Mineralogical Magazine: 77: 69-80.
Download:
https://rruff.info/rruff_1.0/uploads/MM77_69.pdf

Synonyms of Cerchiaraite-(Fe)Hide

Relationship of Cerchiaraite-(Fe) to other SpeciesHide

Member of:
Cerchiaraite Group
Other Members of this group:
Cerchiaraite-(Al)Ba4Al4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
Cerchiaraite-(Mn)Ba4Mn3+4(Si4O12)O2(OH)4Cl2[Si2O3(OH)4]Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm

Common AssociatesHide

Associated Minerals Based on Photo Data:
12 photos of Cerchiaraite-(Fe) associated with QuartzSiO2
8 photos of Cerchiaraite-(Fe) associated with SanborniteBa2(Si4O10)
5 photos of Cerchiaraite-(Fe) associated with GillespiteBaFe2+Si4O10
5 photos of Cerchiaraite-(Fe) associated with TitantaramelliteBa4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2Clx
4 photos of Cerchiaraite-(Fe) associated with PellyiteBa2Ca(Fe,Mg)2Si6O17
4 photos of Cerchiaraite-(Fe) associated with HedenbergiteCaFe2+Si2O6
4 photos of Cerchiaraite-(Fe) associated with PyrrhotiteFe1-xS
4 photos of Cerchiaraite-(Fe) associated with Tobermorite-11Å
3 photos of Cerchiaraite-(Fe) associated with WitheriteBaCO3
3 photos of Cerchiaraite-(Fe) associated with ItsiiteBa4Ca2[Si8B4O28]◻

Related Minerals - Strunz-mindat GroupingHide

9.CF.BobmeyeritePb4(Al3Cu)(Si4O12)(S0.5Si0.5O4)(OH)7Cl(H2O)3Orth. mmm (2/m 2/m 2/m) : Pnnm
9.CF.05AshburtonitePb4Cu4(Si4O12)(HCO3)4(OH)3Cl · H2OTet.
9.CF.10Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2OOrth. mmm (2/m 2/m 2/m)
9.CF.15ClinophosinaiteNa12(Ca,Sr)4(Si4O12)(PO4)4Mon. 2/m : P2/b
9.CF.15Phosinaite-(Ce)Na13Ca2(Ce,La,Th,Nd,Pr)(Si4O12)(PO4)4Orth. 2 2 2 : P21 21 2
9.CF.20StrakhoviteNaBa3Mn2+2Mn3+2Si6O19(OH)3Orth. mmm (2/m 2/m 2/m)
9.CF.25Cerchiaraite-(Mn)Ba4Mn3+4(Si4O12)O2(OH)4Cl2[Si2O3(OH)4]Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
9.CF.25Cerchiaraite-(Al)Ba4Al4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm

Other InformationHide

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

Internet Links for Cerchiaraite-(Fe)Hide

References for Cerchiaraite-(Fe)Hide

Localities for Cerchiaraite-(Fe)Hide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada
 
  • Yukon
    • Watson Lake mining district
      • Itsi Mountain
        • Wilson Lake
McNeil et al. (2013) +1 other reference
Kampf et al. (2014)
Italy (TL)
 
  • Liguria
    • La Spezia Province
      • Borghetto di Vara
Williams et al. (2012) +1 other reference
Mexico
 
  • Baja California
    • Tres Pozos
Frank K. Mazdab collection (petrography + EPMA characterized) +2 other references
Sweden
 
  • Örebro County
    • Askersund
      • Zinkgruvan
Cámara et al. (2021)
USA (TL)
 
  • California
    • Fresno County
      • Big Creek-Rush Creek Mining District
        • Big Creek
Walstrom (n.d.) +2 other references
Walstrom (n.d.) +2 other references
    • Mariposa County
      • East Belt
        • Clearing House Mining District
          • Clearing House
            • Trumbull Peak
Kampf et al. (2013)
    • Tulare County
      • Dumtah
Walstrom (n.d.)
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