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Caryochroite

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Hazelnuts - Kάρυον
Formula:
(Na,Sr)3(Fe3+,Mg)10[(O,OH)9|Ti2Si12O37] · (H2O,O,OH)17
Colour:
hazel-brown
Lustre:
Waxy, Dull
Hardness:
Specific Gravity:
2.99
Crystal System:
Monoclinic
Name:
From the Greek κάρυον, "a hazelnut", and χρώσις, "colouring", referring to its colour.
Related to nafertisite.


Classification of Caryochroite

Approved
Approval Year:
2005
9.HA.65

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
56.2.10.6

56 : SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
2 : Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination

Physical Properties of Caryochroite

Waxy, Dull
Transparency:
Opaque
Colour:
hazel-brown
Streak:
pale brownish yellow
Hardness:
2½ on Mohs scale
Hardness Data:
Measured
Cleavage:
Distinct/Good
{001}
Parting:
none
Fracture:
Conchoidal
Density:
2.99(5) g/cm3 (Measured)    3.076 g/cm3 (Calculated)

Chemical Properties of Caryochroite

Formula:
(Na,Sr)3(Fe3+,Mg)10[(O,OH)9|Ti2Si12O37] · (H2O,O,OH)17
IMA Formula:
(Na,Sr)3(Fe3+,Mg)10Ti2Si12O37(H2O,O,OH)17

Crystallography of Caryochroite

Crystal System:
Monoclinic
Cell Parameters:
a = 16.47 Å, b = 5.303 Å, c = 24.39 Å
β = 93.5°
Ratio:
a:b:c = 3.106 : 1 : 4.599
Unit Cell V:
2,126.26 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder Diffraction

Powder Diffraction Data:
d-spacingIntensity
14.1 (20)
13.3 (30)
12.1 (100)
4.38 (10)
2.692 (12)
2.631 (13)

Type Occurrence of Caryochroite

General Appearance of Type Material:
centimetric crusts
Associated Minerals at Type Locality:

Synonyms of Caryochroite

Other Language Names for Caryochroite

Common Associates

Associated Minerals Based on Photo Data:
Elpidite7 photos of Caryochroite associated with Elpidite on mindat.org.
Pyrite5 photos of Caryochroite associated with Pyrite on mindat.org.
Bitumen2 photos of Caryochroite associated with Bitumen on mindat.org.
Albite2 photos of Caryochroite associated with Albite on mindat.org.
Natrolite1 photo of Caryochroite associated with Natrolite on mindat.org.

Related Minerals - Nickel-Strunz Grouping

9.HA.05ErtixiiteNa2Si4O9
9.HA.10KenyaiteNa2Si22O41(OH)8 · 6H2O
9.HA.20WawayandaiteCa6Mn2BBe9Si6O23(OH,Cl)15
9.HA.25MagbasiteKBaFe3+Mg7Si8O22(OH)2F6
9.HA.30AfanasyevaiteCa8[Si2O7]OCl2
9.HA.40IgumnoviteCa3Al2(SiO4)2Cl4
9.HA.50RudenkoiteSr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O
9.HA.55FoshallasiteCa3[Si2O7] · 3H2O(?)
9.HA.60NagelschmidtiteCa7(SiO4)2(PO4)2
9.HA.70JuaniteCa10Mg4Al2Si11O39 · 4H2O or near
9.HA.75TacharaniteCa12Al2Si18O33 (OH)36
9.HA.80OyeliteCa10Si8B2O29 · 12.5H2O
9.HA.85DenisoviteCa2(K,Na)Si3O8(F,OH)2
9.HA.90Tiettaite(Na,K)17FeTiSi16O29(OH)30 · 2H2O

Related Minerals - Dana Grouping (8th Ed.)

56.2.10.1MelanotekitePb2Fe3+2(Si2O7)O2
56.2.10.2KentrolitePb2Mn3+2(Si2O7)O2
56.2.10.6Nechelyustovite(Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(O,H2O,F)2 · 4.5H2O
56.2.10.7Bykovaite(Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(H2O,F,OH)2 · 3.5H2O

Fluorescence of Caryochroite

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.

References for Caryochroite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kartashov, P.M., Ferraris, G., Soboleva, S.V., Chukanov, N.V. (2006): Caryochroite, a new heterophyllosilicate mineral species related to nafertisite from the Lovozero massif (Kola Peninsula, Russia). Canadian Mineralogist, 44, 1331-1339

Internet Links for Caryochroite

mindat.org URL:
https://www.mindat.org/min-28997.html
Please feel free to link to this page.

Localities for Caryochroite

(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 (TL)
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Lovozero Massif
          • Alluaiv Mt
Kartashov P.M., Ferraris G., Soboleva S.V., Chukanov N.V. (2006): Caryochroite, a new heterophyllosilicate mineral species related to nafertisite from the Lovozero massif (Kola Peninsula, Russia). Canadian Mineralogist, 44, 1331-1339
Mineral and/or Locality  
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