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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
System:
Monoclinic
Colour:
hazel-brown
Hardness:
Name:
From the Greek κάρυον, "a hazelnut", and χρώσις, "colouring", referring to its colour.
Related to Nafertisite.

Classification of Caryochroite

Approved 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
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Type Occurrence of Caryochroite

General Appearance of Type Material:
centimetric crusts

Physical Properties of Caryochroite

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

Crystallography of Caryochroite

Crystal System:
Monoclinic
Cell Parameters:
a = 16.47Å, b = 5.303Å, c = 24.39Å
β = 93.5°
Ratio:
a:b:c = 3.106 : 1 : 4.599
Unit Cell Volume:
V 2,126.26 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction Data:
d-spacingIntensity
14.1 (20)
13.3 (30)
12.1 (100)
4.38 (10)
2.692 (12)
2.631 (13)

Chemical Properties of Caryochroite

Formula:
(Na,Sr)3(Fe3+,Mg)10[(O,OH)9|Ti2Si12O37] · (H2O,O,OH)17
Essential elements:
All elements listed in formula:

Relationship of Caryochroite to other Species

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.75TacharaniteCa12Al2Si18O51 · 18H2O
9.HA.80OyeliteCa10Si8B2O29 · 12.5H2O
9.HA.85DenisoviteCa2(K,Na)Si3O8(F,OH)2
9.HA.90Tiettaite(Na,K)17FeTiSi16O29(OH)30 · 2H2O

Other Names for Caryochroite

Name in Other Languages:

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:
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

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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