Tacharanite
A valid IMA mineral species - grandfathered
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About Tacharanite
Formula:
Ca12Al2Si18O33 (OH)36
Colour:
White
Lustre:
Vitreous, Dull
Hardness:
5
Specific Gravity:
2.33 - 2.36
Crystal System:
Monoclinic
Name:
From Gaelic "tacharan", a changeling, because the mineral breaks down into other compounds if left standing in air. (Note, however, that some specimens stored in collections for years showed no indication of any alteration when checked by powder X-ray diffraction.) Pronounced TĂ·KHERENAIT.
Unique Identifiers
Mindat ID:
3864
Long-form identifier:
mindat:1:1:3864:1
GUID
(UUID V4):
(UUID V4):
95f526db-f56a-46c6-acd8-6372d8e5aec0
IMA Classification of Tacharanite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ca12Al2Si18O33(OH)36
First published:
1961
Classification of Tacharanite
9.HA.75
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
72.3.2.6
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
3 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
3 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
16.11.8
16 : Silicates Containing Aluminum and other Metals
11 : Aluminosilicates of Ca and Mg with or without alkalis
16 : Silicates Containing Aluminum and other Metals
11 : Aluminosilicates of Ca and Mg with or without alkalis
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 |
|---|---|---|
| Tch | 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 Tacharanite
Vitreous, Dull
Transparency:
Translucent
Colour:
White
Hardness:
5 on Mohs scale
Cleavage:
Perfect
{001}
{001}
Fracture:
Conchoidal
Comment:
tenacity: tough
Density:
2.33 - 2.36 g/cm3 (Measured) 2.28 g/cm3 (Calculated)
Optical Data of Tacharanite
Type:
Biaxial (+)
RI values:
nα = 1.518 - 1.525 nγ = 1.530 - 1.537
Max Birefringence:
δ = 0.012
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:
Moderate
Dispersion:
relatively strong
Chemistry of Tacharanite
Mindat Formula:
Ca12Al2Si18O33 (OH)36
Common Impurities:
Fe,Mg,Na,K
Crystallography of Tacharanite
Crystal System:
Monoclinic
Cell Parameters:
a = 17.07 Å, b = 3.65 Å, c = 27.9 Å
β = 114.1°
β = 114.1°
Ratio:
a:b:c = 4.677 : 1 : 7.644
Unit Cell V:
1,586.80 ų (Calculated from Unit Cell)
Z:
1
Comment:
Point Group: n.d.; Space Group: A-centered monoclinic pseudocell.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.7 Å | (vvs) |
| 3.048 Å | (vs) |
| 2.775 Å | (s) |
| 1.822 Å | (s) |
| 5.19 Å | (ms) |
| 2.888 Å | (ms) |
| 2.853 Å | (ms) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 10 : Basalt-hosted zeolite minerals | |
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 16 : Low-𝑇 aqueous alteration of Hadean subaerial lithologies (see also #23) |
Type Occurrence of Tacharanite
General Appearance of Type Material:
Dense, white cryptocrystalline
Place of Conservation of Type Material:
Natural History Museum, London, England, 1961,163.
National School of Mines, Paris, France.
National School of Mines, Paris, France.
Associated Minerals at Type Locality:
Reference:
Sweet, J.M., Bothwell, D.I., Williams, D.L. (1961) Tacharanite and other hydrated calcium silicates from Portree, Isle of Skye. Mineralogical Magazine: 32: 745-753.
Other Language Names for Tacharanite
German:Tacharanit
Spanish:Tacharanita
Common Associates
Associated Minerals Based on Photo Data:
| 57 photos of Tacharanite associated with Phillipsite Subgroup | |
| 18 photos of Tacharanite associated with Gyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| 11 photos of Tacharanite associated with Natrolite | Na2Al2Si3O10 · 2H2O |
| 7 photos of Tacharanite associated with Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| 3 photos of Tacharanite associated with Gmelinite Subgroup | |
| 3 photos of Tacharanite associated with Phillipsite-Na | (Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] · 12H2O |
| 3 photos of Tacharanite associated with Tobermorite | Ca4Si6O17(H2O)2 · (Ca · 3H2O) |
| 2 photos of Tacharanite associated with Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O |
| 2 photos of Tacharanite associated with Chabazite-Na | (Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O |
| 2 photos of Tacharanite associated with Aragonite | CaCO3 |
Related Minerals - Strunz-mindat Grouping
| 9.HA. | Qeltite | Ca3TiSi2(Fe3+2Si)O14 |
| 9.HA. | Kalyuzhnyite-(Ce) | NaKCaSrCeTi(Si8O21)OF(H2O)3 |
| 9.HA. | Shinichengite | Ca5[BSi2O7(OH)2]2 · 6H2O |
| 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 | Igumnovite | Ca3Al2[SiO4]2[◻Cl4] |
| 9.HA.40 | Kasatkinite | Ba2Ca8B5Si8O32(OH)3 · 6H2O |
| 9.HA.42 | Paqueite | Ca3TiSi2(Al,Ti,Si)3O14 |
| 9.HA.45 | Rippite | K2(Nb,Ti)2(Si4O12)O(O,F) |
| 9.HA.47 | Zagamiite | CaAl2Si3.5O11 |
| 9.HA.50 | α-Carnegieite | NaAlSiO4 |
| 9.HA.50 | Rudenkoite | Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O |
| 9.HA.52 | Atheriastite | near Ca5MgFeAl6Si8O32 · 5H2O |
| 9.HA.55 | Balvraidite | |
| 9.HA.55 | Foshallasite | Ca3[Si2O7] · 3H2O(?) |
| 9.HA.57 | Bhreckite | Ca, Mg, Fe, Si, O, H |
| 9.HA.60 | Bravaisite | |
| 9.HA.60 | Nagelschmidtite | Ca7(SiO4)2(PO4)2 |
| 9.HA.65 | Caryochroite | (Na,Sr)3(Fe3+,Mg)10[Ti2Si12O37] · (H2O,O,OH)17 |
| 9.HA.70 | Juanite | Ca10Mg4Al2Si11O39 · 4H2O or near |
| 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 |
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 Tacharanite
mindat.org URL:
https://www.mindat.org/min-3864.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Tacharanite
Reference List:
Cliff, G., Gard, J. A., Lorimer, G. W., Taylor, H. F. W. (1975) Tacharanite. Mineralogical Magazine, 40 (310) 113-126 doi:10.1180/minmag.1975.040.310.01
Fleischer, Michael, Pabst, Adolf, Cabri, Louis J. (1976) New Mineral Names. American Mineralogist, 61 (9-10) 1053-1056
Localities for Tacharanite
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.
Australia | |
| R Bottrill coll. |
| Bottrill et al. (2008) |
| Tschernich (1992) +1 other reference |
| www.crocoite.com (2003) |
| Bottrill et al. (2008) |
| Anderson (1984) |
| Mathew Latham coll. +1 other reference |
Austria | |
| Postl et al. (1996) |
| Exel (1993) |
Canada | |
| Tschernich (1992) |
| 179-181. +2 other references |
Chile | |
| Aguirre et al. (1998) |
France | |
| Leconte J. (2015) |
| Queneau (n.d.) |
| Boutry et al. (1986) |
Germany | |
| Kolitsch (1997) |
| Koritnig (1972) |
| Hentschel (1987) |
| Hentschel |
Hungary | |
| Kónya-MÁFI |
| |
Israel | |
| Britvin et al. (2021) +1 other reference |
| Sokol et al. (2014, November) |
| Galuskin et al. (2023) | |
| Krzątała et al. (2023) | |
| Galuskin +1 other reference | |
Italy | |
| Antofilli |
| Cortesogno L. |
| Sicurella et al. (2010) |
| Sicurella et al. (2010) | |
| Batacchi C. et al. (2016) |
| Fabris et al. (2014) +1 other reference |
| Boscardin (2014) |
| Boscardin M. et al. (2011) +1 other reference |
Japan | |
| Minakawa and Noto (1985) |
| Mineralogical Journal Vol. 13 (1986) |
| Lykova et al. (2020) |
| Petrov (n.d.) +1 other reference |
Jordan | |
| Khoury et al. (1985) |
Middle East | |
| Gross (1977) +1 other reference | |
Russia | |
| M.Moiseev data |
| Zadov +5 other references |
Slovakia | |
| Martin Števko-unpublished |
Spain | |
| Bareche (2005) |
UK | |
| Henmi et al. (1973) |
| Sweet (1961) +1 other reference |
USA | |
| Ream (2004) |
| Ream (2004) |
| Tschernich (1992) |
| Rudy Tschernich Zeolite Collection |
| Micro Probe (1989) |
| Rudy Tschernich Zeolite Collection |
| Micro Probe Volume VII Number 8 Fall ... | |
| Micro Probe VolumeVII Number 3 Spring ... |
| Rudy Tschernich Zeolite Collection |
| R. S. Mirchell and W. F. Giannini (1987) +1 other reference |
| Dietrich (1990) |
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Maglovec quarry, Vyšná Šebastová, Prešov District, Prešov Region, Slovakia