Charoite
A valid IMA mineral species
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About Charoite
Unique Identifiers
Mindat ID:
972
Long-form identifier:
mindat:1:1:972:4
GUID
(UUID V4):
(UUID V4):
200389f3-2447-4082-b82e-0478b4179623
IMA Classification of Charoite
Approved
IMA Formula:
(K,Sr,Ba,Mn)15-16(Ca,Na)32[Si70(O,OH)180](OH,F)4 · nH2O
Classification of Charoite
9.DG.92
9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
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
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)
17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Cha | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Charoite
Vitreous, Silky
Transparency:
Translucent
Colour:
Violet to deep lilac, whitish-grey to brown
Comment:
Material from the type locality is vivid purple, due to trace manganese. Whitish-gray to brown from Patyn Mt.
Hardness:
5 - 6 on Mohs scale
Hardness:
VHN50=412 kg/mm2 - Vickers
Cleavage:
Distinct/Good
Good in three directions.
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.
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r < v strong
Optical Extinction:
X = b, Z ∧ c = 5°.
Pleochroism:
Weak
Comments:
X= rose
Z= colorless
Z= colorless
Chemistry of Charoite
Mindat 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
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°
β = 96.3°
Ratio:
a:b:c = 1.643 : 1 : 0.364
Unit Cell V:
4517 ų
Z:
2
Morphology:
Fibrous, massive.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0017698 | Charoite | Rozhdestvenskaya I, Mugnaioli E, Czank M, Depmeier W, Kolb U, Reinholdt A, Weirich T (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 | 2010 | Murun massif, Yakutiya, Russia | 0 | 293 | |
0018568 | Charoite | Rozhdestvenskaya I V, Mugnaioli E, Czank M, Depmeier W, Kolb U, Merlino S (2011) Essential features of the polytypic charoite-96 structure compared to charoite-90 Mineralogical Magazine 75 2833-2846 | 2011 | Murun massif in Yakutia, Sakha Republic, Siberia, Russia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.348 Å | (100) |
3.134 Å | (85) |
12.5 Å | (70) |
2.79 Å | (50) |
2.71 Å | (35) |
3.90 Å | (30) |
2.97 Å | (30) |
Comments:
Murun massif, Russia. Data from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks |
Geological Setting:
Potassic feldspar metasomatites
Type Occurrence of Charoite
Place of Conservation of Type Material:
University of Rome, Rome, Italy, number 24352.
A.E. Fersman Mineralogical Museum, Moscow, Russia.
A.E. Fersman Mineralogical Museum, Moscow, Russia.
Geological Setting of Type Material:
K-feldspar metasomatites at the contact of nepheline- and aegirine-syenites with limestones.
Associated Minerals at Type Locality:
Synonyms of Charoite
Other Language Names for Charoite
Common Associates
Associated Minerals Based on Photo Data:
186 photos of Charoite associated with Aegirine | NaFe3+Si2O6 |
103 photos of Charoite associated with Tinaksite | K2Na(Ca,Mn2+)2TiO[Si7O18(OH)] |
49 photos of Charoite associated with Steacyite | K0.3(Na,Ca)2ThSi8O20 |
37 photos of Charoite associated with Quartz | SiO2 |
21 photos of Charoite associated with Frankamenite | K3Na3Ca5(Si12O30)(F,OH)4 · H2O |
16 photos of Charoite associated with Fedorite | (Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2O |
12 photos of Charoite associated with Pectolite | NaCa2Si3O8(OH) |
12 photos of Charoite associated with Tokkoite | K2Ca4[Si7O18(OH)](OH,F) |
12 photos of Charoite associated with Microcline | K(AlSi3O8) |
11 photos of Charoite associated with Galena | PbS |
Related Minerals - Strunz-mindat Grouping
9.DG. | Barrydawsonite-(Y) | Na1.5Y0.5CaSi3O8(OH) |
9.DG. | Paratobermorite | Ca5AlSi5O16(OH) · 5H2O |
9.DG. | Calcinaksite | KNaCa(Si4O10) · H2O |
9.DG. | Alvesite | NaKZrSi6O15 · 2H2O |
9.DG.02 | Steedeite | NaMn2[Si3BO9](OH)2 |
9.DG.02 | Nolzeite | NaMn2[Si3BO9](OH)2 · 2H2O |
9.DG.05 | Murakamiite | LiCa2Si3O8(OH) |
9.DG.05 | Serandite | NaMn2+2Si3O8(OH) |
9.DG.05 | Bustamite | CaMn2+(Si2O6) |
9.DG.05 | Pectolite | NaCa2Si3O8(OH) |
9.DG.05 | Tanohataite | LiMn2Si3O8(OH) |
9.DG.05 | Dalnegorskite | Ca5Mn(Si3O9)2 |
9.DG.05 | Wollastonite-1A | CaSiO3 |
9.DG.05 | Wollastonite | Ca3(Si3O9) |
9.DG.05 | Ferrobustamite | CaFe2+(Si2O6) |
9.DG.05 | Schizolite | NaCaMnSi3O8(OH) |
9.DG.07 | Cascandite | CaScSi3O8(OH) |
9.DG.08 | Plombièrite | Ca5Si6O16(OH)2 · 7H2O |
9.DG.10 | Clinotobermorite | Ca5Si6O17 · 5H2O |
9.DG.10 | Riversideite | Ca5Si6O16(OH)2 · 2H2O |
9.DG.10 | Tobermorite | Ca5Si6O17 · 5H2O |
9.DG.12 | Jusite | Na2Ca15Al4Si16O54 · 17H2O |
9.DG.12 | Kenotobermorite | Ca4Si6O15(OH)2 · 5H2O |
9.DG.15 | Foshagite | Ca4(Si3O9)(OH)2 |
9.DG.20 | Jennite | Ca9(Si3O9)2(OH)8 · 8H2O |
9.DG.20 | Kamenevite | K2TiSi3O9 · H2O |
9.DG.25 | Paraumbite | K3Zr2H(Si3O9)2 · nH2O |
9.DG.25 | Umbite | K2(Zr,Ti)Si3O9 · H2O |
9.DG.30 | Sørensenite | Na4SnBe2Si6O16(OH)4 |
9.DG.32 | Escheite | Ca2NaMnTi5[Si12O34]O2(OH)3 · 12H2O |
9.DG.35 | Xonotlite | Ca6(Si6O17)(OH)2 |
9.DG.40 | Hillebrandite | Ca2(SiO3)(OH)2 |
9.DG.45 | Zorite | Na8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2O |
9.DG.45 | Chivruaiite | Ca4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2O |
9.DG.50 | Haineaultite | (Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2O |
9.DG.55 | Epididymite | Na2Be2Si6O15 · H2O |
9.DG.60 | Eudidymite | Na2Be2Si6O15 · H2O |
9.DG.65 | Elpidite | Na2ZrSi6O15 · 3H2O |
9.DG.65 | Patynite | NaKCa4[Si9O23] |
9.DG.67 | Whelanite | Cu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2O |
9.DG.70 | Enricofrancoite | KNaCaSi4O10 |
9.DG.70 | Yusupovite | Na2Zr(Si6O15) · 2.5H2O |
9.DG.70 | Litidionite | CuNaKSi4O10 |
9.DG.70 | Fenaksite | (K,Na)4(Fe,Mn)2(Si4O10)2(OH,F) |
9.DG.70 | Manaksite | KNaMnSi4O10 |
9.DG.75 | Senkevichite | CsKNaCa2TiO[Si7O18](OH) |
9.DG.75 | Tinaksite | K2Na(Ca,Mn2+)2TiO[Si7O18(OH)] |
9.DG.75 | Tokkoite | K2Ca4[Si7O18(OH)](OH,F) |
9.DG.80 | Fluorcanasite | K3Na3Ca5Si12O30F4 · H2O |
9.DG.80 | Canasite | K3Na3Ca5Si12O30(OH)4 |
9.DG.85 | Miserite | K1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2O |
9.DG.90 | Frankamenite | K3Na3Ca5(Si12O30)(F,OH)4 · H2O |
9.DG.95 | Yuksporite | K4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3 |
9.DG.97 | Eveslogite | (Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14 |
Other Information
IR Spectrum:
The IR spectrum shows the presence of both molecular
water and hydroxyl.
water and hydroxyl.
Thermal Behaviour:
About 2.4% H2O is lost up to 300° and l.3% more to 600°. Small endothermic effects are noted at 440°, 760°, and 970°.
Notes:
Insoluble in acids.
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 rock names highlighted in red, an accessory component in rock names highlighted in green.
Internet Links for Charoite
mindat.org URL:
https://www.mindat.org/min-972.html
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External Links:
References for Charoite
Reference List:
Hawthorne, Frank C., Burke, Ernst A. J., Ercit, T. Scott, Grew, Edward S., Grice, Joel D., Jambor, John L., Puziewicz, Jacek, Roberts, Andrew C., Vanko, David A. (1988) New Mineral Names. American Mineralogist, 73 (1-2) 189-199
Rozhdestvenskaya, I. V., Kogure, T., Abe, E., Drits, V. A. (2009) A structural model for charoite. Mineralogical Magazine, 73 (5) 883-890 doi:10.1180/minmag.2009.073.2.883
Rozhdestvenskaya, I., Mugnaioli, E., Czank, M., Depmeier, W., Kolb, U., Reinholdt, A., Weirich, T. (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 (1) 159-177 doi:10.1180/minmag.2010.074.1.159
Localities for Charoite
Locality List




All localities listed without proper references should be considered as questionable.
India | |
| Deepthi et al. (2015) |
Russia (TL) | |
| [Lapis 1993:4 p.13-20] +1 other reference |
Kaneva +4 other references | |
Solyanik et al. (2008) +3 other references | |
Pavel.M. Kartashov (n.d.) | |
Natural History Museum Vienna collection | |
Pekov (1998) | |
Vorob'yov E.I. (2008) | |
Vorob'yov E.I. (2008) | |
Pavel.M. Kartashov (n.d.) | |
Kaneva +3 other references | |
| Vladykin et al. (2008) |
Kaneva et al. (2020) | |
| doi.org (n.d.) +1 other reference |
Quick NavTopAbout CharoiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationCharoite in petrologyInternet Links References Localities Locality List
Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Russia