Caryochroite
A valid IMA mineral species
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About Caryochroite
Hazelnuts - Kάρυον
Formula:
[Na(Sr0.5Ca0.5)Mg]3[Fe3+8Mn(Fe2+0.5◻0.5)]10(Ti2Si12O37)(OH)14(H2O)3
formerly given as: (Na,Sr)3(Fe3+,Mg)10[Ti2Si12O37]·(H2O,O,OH)17
Colour:
Hazel-brown
Lustre:
Waxy, Dull
Hardness:
2½
Specific Gravity:
2.99
Crystal System:
Monoclinic
Name:
From the Greek κάρυον, "a hazelnut", and χρώσις, "colouring", referring to its colour.
Related to nafertisite.
Represents a new type of titanosilicate lattice, with large structural channels enclosing the exchange cations and a high amount of both OH groups and H2O molecules.
Unique combination of elements (status: May 2024).
Represents a new type of titanosilicate lattice, with large structural channels enclosing the exchange cations and a high amount of both OH groups and H2O molecules.
Unique combination of elements (status: May 2024).
Unique Identifiers
Mindat ID:
28997
Long-form identifier:
mindat:1:1:28997:7
IMA Classification of Caryochroite
Approved
IMA Formula:
(Na,Sr)3(Fe3+,Mg)10Ti4+2Si12O37(H2O,O,OH)17
Approval year:
2005
First published:
2006
Type description reference:
Classification of Caryochroite
9.HA.65
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
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
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
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 for Standard |
|---|---|---|
| Cyh | 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 Caryochroite
Waxy, Dull
Transparency:
Opaque
Colour:
Hazel-brown
Streak:
Pale brownish yellow
Hardness:
2½ on Mohs scale
Hardness Data:
Measured
Cleavage:
Distinct/Good
{001}
{001}
Parting:
none
Fracture:
Conchoidal
Density:
2.99(5) g/cm3 (Measured) 3.076 g/cm3 (Calculated)
Optical Data of Caryochroite
Type:
Biaxial (-)
RI values:
nα = 1.687 nβ = 1.745(5) nγ = 1.775(5)
2V:
Measured: 75°
Max. Birefringence:
δ = 0.088
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Optical Extinction:
Y = a, Z = b.
Pleochroism:
Visible
Comments:
X = Y = dark brown, Z = brown.
Comments:
Absorption: X = Y > Z.
α is calculated.
α is calculated.
Chemistry of Caryochroite
Mindat Formula:
[Na(Sr0.5Ca0.5)Mg]3[Fe3+8Mn(Fe2+0.5◻0.5)]10(Ti2Si12O37)(OH)14(H2O)3
formerly given as: (Na,Sr)3(Fe3+,Mg)10[Ti2Si12O37]·(H2O,O,OH)17
formerly given as: (Na,Sr)3(Fe3+,Mg)10[Ti2Si12O37]·(H2O,O,OH)17
Element Weights:
Crystallography of Caryochroite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 16.550(3) Å, b = 5.281(2) Å, c = 24.25(3) Å
β = 93.0°
β = 93.0°
Ratio:
a:b:c = 3.134 : 1 : 4.592
Unit Cell V:
2,116.56 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space Group: P2/n
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 14.1 Å | (20) |
| 13.3 Å | (30) |
| 12.1 Å | (100) |
| 4.38 Å | (10) |
| 2.692 Å | (12) |
| 2.631 Å | (13) |
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 |
Type Occurrence of Caryochroite
General Appearance of Type Material:
Millimeter-sized spherules forming crusts up to 5 x 5 x 0.2 cm. Single crystals are observable only by electron microscopy.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, RAS, Moscow, Russia (3313/1)
Geological Setting of Type Material:
Supergene alteration (oxidation and dehydration) of dump material from a pegmatite. Derived from an undescribed Fe2+-rich protophase.
Associated Minerals at Type Locality:
Synonyms of Caryochroite
Other Language Names for Caryochroite
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.HA. | Shinichengite | Ca5[BSi2O7(OH)2]2 · 6H2O |
| 9.HA. | Kalyuzhnyite-(Ce) | NaKCaSrCeTi(Si8O21)OF(H2O)3 |
| 9.HA. | Moragite | Ca3TiSi2(Al2Si)O14 |
| 9.HA.05 | Ertixiite | Na2Si4O9 |
| 9.HA.10 | Kenyaite | Na2Si22O41(OH)8 · 6H2O |
| 9.HA.20 | Wawayandaite | Ca6Mn2BBe9Si6O23(OH,Cl)15 |
| 9.HA.25 | Magbasite | KBaFe3+Mg7Si8O22(OH)2F6 |
| 9.HA.35 | Demagistrisite | BaCa2Mn3+4(Si3O10)(Si2O7)(OH)4 · 3H2O |
| 9.HA.37 | Donwilhelmsite | CaAl4Si2O11 |
| 9.HA.40 | Kasatkinite | Ba2Ca8B5Si8O32(OH)3 · 6H2O |
| 9.HA.40 | 'Igumnovite' | Ca3Al2[SiO4]2[◻Cl4] |
| 9.HA.42 | Paqueite | Ca3TiSi2(Al,Ti,Si)3O14 |
| 9.HA.42 | Qeltite | Ca3TiSi2(Fe3+2Si)O14 |
| 9.HA.45 | Rippite | K2(Nb,Ti)2(Si4O12)O(O,F) |
| 9.HA.47 | Zagamiite | CaAl2Si3.5O11 |
| 9.HA.50 | Rudenkoite | Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O |
| 9.HA.50 | 'α-Carnegieite' | NaAlSiO4 |
| 9.HA.52 | 'Atheriastite' | near Ca5MgFeAl6Si8O32 · 5H2O |
| 9.HA.55 | 'Foshallasite' | Ca3[Si2O7] · 3H2O(?) |
| 9.HA.57 | 'Bhreckite' | |
| 9.HA.60 | Nagelschmidtite | Ca7(SiO4)2(PO4)2 |
| 9.HA.70 | Juanite | Ca10Mg4Al2Si11O39 · 4H2O or near |
| 9.HA.75 | Tacharanite | Ca12Al2Si18O33(OH)36 |
| 9.HA.80 | Oyelite | Ca10Si8B2O29 · 12.5H2O |
| 9.HA.85 | Denisovite | K14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4-x) · 2H2O |
| 9.HA.90 | Tiettaite | K4Na12Fe3+Si16O41(OH)4 · 2H2O |
Fluorescence of Caryochroite
none
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.
Internet Links for Caryochroite
mindat.org URL:
https://www.mindat.org/min-28997.html
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Please feel free to link to this page.
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References for Caryochroite
Localities for Caryochroite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| Kartashov et al. (2006) |
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Umbozero mine, Alluaiv Mountain, Lovozersky District, Murmansk Oblast, Russia