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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
Colour:
Violet to deep lilac
Lustre:
Vitreous, Silky
Hardness:
5 - 6
Specific Gravity:
2.54
Crystal System:
Monoclinic
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)

Physical Properties of Charoite

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

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
IMA Formula:
(K,Sr,Ba,Mn)15-16(Ca,Na)32Si70(O,OH)180(OH,F)4 · nH2O
Common Impurities:
Al,Fe,Mn,Sr,Ba

Crystallography of Charoite

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

Type Occurrence of Charoite

Place of Conservation of Type Material:
University of Rome 24352

Synonyms of Charoite

Other Language Names for Charoite

Dutch:Charoiet
German:Charoit
Italian:Charoite
Lithuanian:Čaroitas
Polish:Czaroit
Russian:Чароит
Spanish:Charoita

Common Associates

AegirineNaFe3+Si2O6
CanasiteK3Na3Ca5Si12O30(OH)4
SteacyiteK0.3(Na,Ca)2ThSi8O20
TinaksiteK2Na(Ca,Mn2+)2Ti[O|Si7O18(OH)]
Associated Minerals Based on Photo Data:
Aegirine97 photos of Charoite associated with Aegirine on mindat.org.
Tinaksite58 photos of Charoite associated with Tinaksite on mindat.org.
Steacyite28 photos of Charoite associated with Steacyite on mindat.org.
Quartz25 photos of Charoite associated with Quartz on mindat.org.
Frankamenite16 photos of Charoite associated with Frankamenite on mindat.org.
Fedorite14 photos of Charoite associated with Fedorite on mindat.org.
Pectolite12 photos of Charoite associated with Pectolite on mindat.org.
Galena11 photos of Charoite associated with Galena on mindat.org.
Microcline8 photos of Charoite associated with Microcline on mindat.org.
Tokkoite7 photos of Charoite associated with Tokkoite on mindat.org.

Related Minerals - Nickel-Strunz Grouping

9.DG.05BustamiteCaMn2+(Si2O6)
9.DG.05FerrobustamiteCaFe2+(Si2O6)
9.DG.05PectoliteNaCa2Si3O8(OH)
9.DG.05SeranditeNaMn2+2Si3O8(OH)
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.75TokkoiteK2Ca4[Si7O18(OH)](OH,F)
9.DG.75SenkevichiteCsKNaCa2Ti[O|Si7O18(OH)]
9.DG.80CanasiteK3Na3Ca5Si12O30(OH)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.95YuksporiteK4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3
9.DG.97Eveslogite(Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14

Related Minerals - Hey's Chemical Index of Minerals Grouping

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
17.1.13CanasiteK3Na3Ca5Si12O30(OH)4
17.1.15CuspidineCa4(Si2O7)(F,OH)2
17.1.16BultfonteiniteCa2(HSiO4)F · H2O
17.1.17ZeophylliteCa13Si10O28(OH)2F8 · 6H2O
17.1.18Rowlandite-(Y)(Y,Ce)4Fe2+(Si2O7)2F2 (?)
17.1.19YuksporiteK4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3
17.1.20Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
17.1.21Mosandrite-(Ce)(Ca3REE)[(H2O)2Ca0.50.5]Ti(Si2O7)2(OH)2(H2O)2
17.1.22Hiortdahlite(Na,Ca)2Ca4Zr(Mn,Ti,Fe)(Si2O7)2(F,O)4
17.1.23BurpaliteNa2CaZr(Si2O7)F2
17.1.24SeidozeriteNa4MnZr2Ti(Si2O7)2O2F2
17.1.25Thorosteenstrupine(Ca,Th,Mn)3Si4O11F · 6H2O
17.1.26Zircophyllite(K,Na)3(Mn,Fe2+)7(Zr,Ti)2Si8O24(O,OH,F)7
17.1.27JinshajiangiteBaNaFe2+4Ti2(Si2O7)2O2(OH)2F
17.1.28RosenbuschiteNa6Ca6Zr3Ti(Si2O7)4O2F6
17.1.29NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2
17.1.30SonoliteMn2+9(SiO4)4(OH)2

Related Minerals - Dana Grouping (8th Ed.)

70.1.2.1NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2
70.1.2.2Caysichite-(Y)Ca2Y2Si4O10(CO3)3 · 4H2O

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

Charoite in petrology

An essential component of (items highlighted in red)

References for Charoite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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

mindat.org URL:
https://www.mindat.org/min-972.html
Please feel free to link to this page.
Specimens:
The following Charoite specimens are currently listed for sale on minfind.com.

Localities for Charoite

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.
(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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