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Caryochroite

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Formula:
(Na,Sr)
 
3
(Fe
3+
 
,Mg)
 
10
[(O,OH)
 
9
|Ti
 
2
Si
 
12
O
 
37
] · (H
 
2
O,O,OH)
 
17
System:MonoclinicColour:hazel-brown
Hardness:
Name:
From the Greek κάρυον, "a hazelnut", and χρώσις, "colouring", referring to its colour.


Related to Nafertisite.

Classification of Caryochroite

IMA status:Approved 2005
Strunz 8th edition ID:8/0.0-
Strunz 9th edition ID:9.EH.30
Nickel-Strunz 10th (pending) edition ID:9.HA.65

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
Dana 8th edition ID: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

Type Locality:Umbozero mine (Umbozerskii mine; Umba Mine), Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
General Appearance of Type Material:centimetric crusts
Associated Minerals at type locality:
SphaleriteQuartzPyriteNatroliteGalena
EpididymiteElpiditeBitumenAlbite

Physical Properties of Caryochroite

Lustre: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 (measured):2.99(5) g/cm3
Density (calculated):3.076 g/cm3

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:
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
(Fe
3+
 
,Mg)
 
10
[(O,OH)
 
9
|Ti
 
2
Si
 
12
O
 
37
] · (H
 
2
O,O,OH)
 
17
Simplified for copy/paste:(Na,Sr)3(Fe3+,Mg)10[(O,OH)9|Ti2Si12O37] ·(H2O,O,OH)17
Essential elements:Fe, H, Na, O, Si, Ti
All elements listed in formula:Fe, H, Mg, Na, O, Si, Sr, Ti

Relationship of Caryochroite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.HA.05Ertixiite
Na
 
2
Si
 
4
O
 
9
9.HA.10Kenyaite
Na
 
2
Si
 
22
O
 
41
(OH)
 
8
· 6H
 
2
O
9.HA.20Wawayandaite
Ca
 
6
Mn
 
2
BBe
 
9
Si
 
6
O
 
23
(OH,Cl)
 
15
9.HA.25Magbasite
KBa(Al,Sc)(Mg,Fe)
 
6
Si
 
6
O
 
20
F
 
2
9.HA.30Afanasyevaite
Ca
 
8
[Si
 
2
O
 
7
]OCl
 
2
9.HA.40Igumnovite
Ca
 
3
Al
 
2
(SiO
 
4
)
 
2
Cl
 
4
9.HA.50Rudenkoite
Sr
 
3
(Al
 
3.5
Si
 
3.5
)O
 
10
(OH,O)
 
8
Cl
 
2
· H
 
2
O
9.HA.55Foshallasite
Ca
 
3
[Si
 
2
O
 
7
] · 3H
 
2
O(?)
9.HA.60Nagelschmidtite
Ca
 
7
(SiO
 
4
)
 
2
(PO
 
4
)
 
2
9.HA.70Juanite
Ca
 
10
Mg
 
4
Al
 
2
Si
 
11
O
 
39
· 4H
 
2
O or near
9.HA.75Tacharanite
Ca
 
12
Al
 
2
Si
 
18
O
 
51
· 18H
 
2
O
9.HA.80Oyelite
Ca
 
10
Si
 
8
B
 
2
O
 
29
· 12.5H
 
2
O
9.HA.85Denisovite
Ca
 
2
(K,Na)Si
 
3
O
 
8
(F,OH)
 
2
9.HA.90Tiettaite
(Na,K)
 
17
FeTiSi
 
16
O
 
29
(OH)
 
30
· 2H
 
2
O

Other Names for Caryochroite

Synonyms:
IMA 2005-031
Other Languages:
Russian:Кариохроит

Other Information

Fluorescence in UV light:none
Health Warning: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

Search Engines:
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  • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Localities for Caryochroite

    (TL) indicates type locality. ? 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
     
    • 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
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