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Charoite

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Formula:
(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O
System:
Monoclinic
Colour:
Violet to deep lilac
Hardness:
5 - 6
Name:
For the type locality, near the Chara River

Classification of Charoite

Approved
9.DG.92

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
70.1.2.3

70 : INOSILICATES Column or Tube Structures
1 : Column or Tube Structures with columnar silicate units
17.1.14

17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)
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Type Occurrence of Charoite

Place of Conservation of Type Material:
University of Rome 24352
Year of Discovery:
1978

Occurrences of Charoite

Geological Setting:
Potassic feldspar metasomatites

Physical Properties of Charoite

Vitreous, Silky
Diaphaneity (Transparency):
Translucent
Colour:
Violet to deep lilac
Hardness (Mohs):
5 - 6
Hardness (Vickers):
VHN50=412 kg/mm2
Cleavage:
Distinct/Good
Good in three directions
Density:
2.54 g/cm3 (Measured)    2.77 g/cm3 (Calculated)

Crystallography of Charoite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 32.296Å, b = 19.651Å, c = 7.16Å
β = 96.3°
Ratio:
a:b:c = 1.643 : 1 : 0.364
Unit Cell Volume:
V 4517 ų
Z:
2
Morphology:
Fibrous, massive

Optical Data of Charoite

Type:
Biaxial (+)
RI values:
nα = 1.550 nβ = 1.553 nγ = 1.559
2V:
Measured: 28° to 30°, Calculated: 72°
Max Birefringence:
δ = 0.009
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r < v strong
Pleochroism:
Weak
Comments:
X= rose
Z= colorless

Chemical Properties of Charoite

Formula:
(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O
Essential elements:
All elements listed in formula:
Common Impurities:
Al,Fe,Mn,Sr,Ba

Relationship of Charoite to other Species

9.DG.05BustamiteCaMn2+(Si2O6)
9.DG.05FerrobustamiteCaFe2+(Si2O6)
9.DG.05PectoliteNaCa2(HSi3O9)
9.DG.05SéranditeNa(Mn2+,Ca)2(HSi3O9)
9.DG.05WollastoniteCaSiO3
9.DG.05Wollastonite-1ACaSiO3
9.DG.07CascanditeCa(Sc,Fe3+)(HSi3O9)
9.DG.08Plombièrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)
9.DG.10Clinotobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
9.DG.10RiversideiteCa5(HSi3O9)2 · 2H2O
9.DG.10Tobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
9.DG.15FoshagiteCa4(Si3O9)(OH)2
9.DG.20JenniteCa9(Si3O9)2(OH)8 · 8H2O
9.DG.25ParaumbiteK3Zr2H(Si3O9)2 · nH2O
9.DG.25UmbiteK2(Zr,Ti)Si3O9 · H2O
9.DG.30SørenseniteNa4SnBe2Si6O16(OH)4
9.DG.35XonotliteCa6(Si6O17)(OH)2
9.DG.40HillebranditeCa2(SiO3)(OH)2
9.DG.45ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2O
9.DG.45ChivruaiiteCa4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2O
9.DG.50Haineaultite(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2O
9.DG.55EpididymiteNa2Be2Si6O15 · H2O
9.DG.60EudidymiteNa2Be2Si6O15 · H2O
9.DG.65ElpiditeNa2ZrSi6O15 · 3H2O
9.DG.70Fenaksite(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)
9.DG.70LitidioniteCuNaKSi4O10
9.DG.70ManaksiteKNaMnSi4O10
9.DG.75TinaksiteK2Na(Ca,Mn2+)2Ti[O|Si7O18(OH)]
9.DG.75TokkoiteK2Ca4Si7O17(O,OH,F)4
9.DG.75SenkevichiteCsKNaCa2Ti[O|Si7O18(OH)]
9.DG.80CanasiteK2Na4Ca5(Si12O30(OH,F)4
9.DG.80FluorcanasiteK3Na3Ca5Si12O30F4 · H2O
9.DG.85MiseriteK1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2O
9.DG.90FrankameniteK3Na3Ca5(Si12O30)(F,OH)4 · H2O
9.DG.95Yuksporite(K,Ba)NaCa2(Si,Ti)4O11(F,OH) · H2O
9.DG.97Eveslogite(Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14
17.1.1HectoriteNa0.3(Mg,Li)3(Si4O10)(F,OH)2
17.1.3AgrelliteNaCa2Si4O10F
17.1.4Fluorapophyllite-(Na)NaCa4(Si8O20)F · 8H2O
17.1.5Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
17.1.6Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
17.1.7HsianghualiteCa3Li2(Be3Si3O12)F2
17.1.8LeucophaniteNaCaBeSi2O6F
17.1.9NorbergiteMg3(SiO4)(F,OH)2
17.1.10Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
17.1.11Humite(Mg,Fe2+)7(SiO4)3(F,OH)2
17.1.12ClinohumiteMg9(SiO4)4F2
17.1.13CanasiteK2Na4Ca5(Si12O30(OH,F)4
17.1.15CuspidineCa4(Si2O7)(F,OH)2
17.1.16BultfonteiniteCa2(HSiO4)F · H2O
17.1.17ZeophylliteCa13(Si10O28)F10 · 6H2O
17.1.18Rowlandite-(Y)(Y,Ce)4Fe2+(Si2O7)2F2 (?)
17.1.19Yuksporite(K,Ba)NaCa2(Si,Ti)4O11(F,OH) · H2O
17.1.20Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
17.1.21Mosandrite(◻,Ca,Na)3(Ca,REE)4Ti(Si2O7)2[H2O,OH,F]4 · H2O
17.1.22Hiortdahlite(Ca,Na)3(Zr,Ti)(Si2O7)(O,OH,F)2
17.1.23BurpaliteNa2CaZr(Si2O7)F2
17.1.24SeidozeriteNa8Mn22+Zr3Ti3(Si2O7)4O4F4
17.1.25ThorosteenstrupineCaMnThSi4O11(OH)F · 6H2O
17.1.26Zircophyllite(K,Na)3(Mn,Fe2+)7(Zr,Ti)2Si8O24(O,OH,F)7
17.1.27JinshajiangiteBaNaFe42+Ti2(Si2O7)2O2(OH)2F
17.1.28Rosenbuschite(Ca,Na)3(Zr,Ti)(Si2O7)OF
17.1.29NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2
17.1.30SonoliteMn92+(SiO4)4(OH,F)2

Other Names for Charoite

Name in Other Languages:
Dutch:Charoiet
German:Charoit
Italian:Charoite
Lithuanian:Čaroitas
Polish:Czaroit
Russian:Чароит
Spanish:Charoita

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.
Industrial Uses:
Jewelry

References for Charoite

Reference List:
M. I. Chiragov & A. F. Shirinova (2004), [Crystalline structure of charoite as a derivative of miserite, canasite and okenite.] (Russian with English abstract): Mineralogical Journal (Ukraine), 26(4), pp 5–9.

American Mineralogist: 63: 1282.

American Mineralogist: 73: 198 (1988)

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 107: 94-100.

Acta Crystallographica: A40, Supplement C, 246.


I.V.Rozhdestvenskaya, T.Kogure, E. Abe, & V.A.Drits (2009), A structural model for charoite. Mineralogical Magazine 73,883-890(2009)

I. Rozhdestvenskaya, E. Mugnaioli, M. Czank, W. Depmeier, U. Kolb, A. Reinholdt & T. Weirich (2010) The structure of charoite, (K,Sr,Ba,Mn)15-16(Ca,Na)32[(Si70(O,OH)180](OH,F)4.0.nH2O, solved by conventional and automated electron diffraction. Mineralogical Magazine, 74, 159-177.

Rozhdestvenskaya I.V. & Drits, V.A. (2013): Peculiarities of the charoite X-ray powder diffraction pattern. Zapiski RMO, 142(4), 101-112.

Internet Links for Charoite

Localities for Charoite

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.
Russia
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya Oblast'
        • Aldan Shield
          • Chara and Tokko Rivers Confluence
            • Murunskii Massif
Vorob'yev E.I. (2008) Charoite, - Novosibirsk. GEO, p. 142 (in Rus.).
    • Sakha Republic (Saha Republic; Yakutia)
      • Aldan Shield
        • Chara and Tokko Rivers Confluence
[Lapis 1993:4 p.13-20]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Rozhdestvenskaya, I. V., Kogure, T., Abe, E., & Drits, V. A. (2009). A structural model for charoite. Mineralogical Magazine, 73(5), 883-890.
Pavel M. Kartashov data
Natural History Museum Vienna collection
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Vorob'yov E.I. (2008) Charoite, - Novosibirsk. GEO, p. 142 (in Rus.).
Vorob'yov E.I. (2008) Charoite, - Novosibirsk. GEO, p. 142 (in Rus.).
Pavel M. Kartashov data
Mineral and/or Locality  
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