Tissintite
A valid IMA mineral species
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About Tissintite
Formula:
(Ca,◻)AlSi2O6
Specific Gravity:
3.395 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
The mineral name is after the host Tissint meteorite, which in turn is named after the town of Tissint, Morocco, where the meteorite fell. It fell on 18 July 2011 and is only the fifth Martian meteorite that people have witnessed falling to Earth.
Ca-analogue of jadeite. A C2/c clinopyroxene, containing 42–60 mol% of the Ca-Eskola component, by far the highest known.
A vacancy-rich, high-pressure clinopyroxene, with a composition essentially equivalent to plagioclase. Formed during a shock event severe enough to allow nucleation and growth of vacancy-rich clinopyroxene from a melt of not too calcic and not too sodic plagioclase composition that was neither too hot nor too cold (Ma et al. 2015), i.e. the meteor hit on Mars that ejected the meteorite material that reached earth.
A vacancy-rich, high-pressure clinopyroxene, with a composition essentially equivalent to plagioclase. Formed during a shock event severe enough to allow nucleation and growth of vacancy-rich clinopyroxene from a melt of not too calcic and not too sodic plagioclase composition that was neither too hot nor too cold (Ma et al. 2015), i.e. the meteor hit on Mars that ejected the meteorite material that reached earth.
Unique Identifiers
Mindat ID:
43890
Long-form identifier:
mindat:1:1:43890:8
IMA Classification of Tissintite
Approved
IMA Formula:
(Ca,Na,◻)AlSi2O6
Approval year:
2013
First published:
2019
Type description reference:
Ma, Chi, Tschauner, Oliver, Beckett, John R., Liu, Yang, Rossman, George R., Zhuravlev, Kirill, Prakapenka, Vitali, Dera, Przemyslaw, Taylor, Lawrence A. (2015) Tissintite, (Ca, Na, □)AlSi2O6, a highly-defective, shock-induced, high-pressure clinopyroxene in the Tissint martian meteorite. Earth and Planetary Science Letters, 422. 194-205 doi:10.1016/j.epsl.2015.03.057
Classification of Tissintite
9.DA.25
9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
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 |
|---|---|---|
| Tss | 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 Tissintite
Density:
3.395 g/cm3 (Calculated)
Chemistry of Tissintite
Mindat Formula:
(Ca,◻)AlSi2O6
Element Weights:
Elements listed:
Crystallography of Tissintite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 9.418(17) Å, b = 8.562(4) Å, c = 5.219(2) Å
β = 107.56(9)°
β = 107.56(9)°
Ratio:
a:b:c = 1.1 : 1 : 0.61
Unit Cell V:
410 ų
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.281 Å | (18) |
| 2.917 Å | (100) |
| 2.827 Å | (28) |
| 2.825 Å | (41) |
| 2.488 Å | (40) |
| 2.482 Å | (18) |
| 2.414 Å | (33) |
| 1.966 Å | (19) |
Reference:
Ma, Chi, Tschauner, Oliver, Beckett, John R., Liu, Yang, Rossman, George R., Zhuravlev, Kirill, Prakapenka, Vitali, Dera, Przemyslaw, Taylor, Lawrence A. (2015) Tissintite, (Ca, Na, □)AlSi2O6, a highly-defective, shock-induced, high-pressure clinopyroxene in the Tissint martian meteorite. Earth and Planetary Science Letters, 422. 194-205 doi:10.1016/j.epsl.2015.03.057
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
| 6 : Secondary asteroid phases | 4.566-4.560 |
Type Occurrence of Tissintite
General Appearance of Type Material:
In maskelynite (shocked plagioclase) less than ∼25 μm of a shock melt pocket.
Place of Conservation of Type Material:
Type material is in Tissint sections UT1 and UT2 deposited in the Meteorite Collection of the Frank H. McClung Museum at the University of Tennessee, Knoxville, Tennessee, USA
Geological Setting of Type Material:
Commonly observed included within, or in contact with, shock-melt pockets in the Tissint meteorite, a depleted olivine-phyric shergottite fall from Mars.
Associated Minerals at Type Locality:
Reference:
Ma, Chi, Tschauner, Oliver, Beckett, John R., Liu, Yang, Rossman, George R., Zhuravlev, Kirill, Prakapenka, Vitali, Dera, Przemyslaw, Taylor, Lawrence A. (2015) Tissintite, (Ca, Na, □)AlSi2O6, a highly-defective, shock-induced, high-pressure clinopyroxene in the Tissint martian meteorite. Earth and Planetary Science Letters, 422. 194-205 doi:10.1016/j.epsl.2015.03.057
Synonyms of Tissintite
Other Language Names for Tissintite
Dutch:Tissintiet
German:Tissintit
Relationship of Tissintite to other Species
Member of:
Other Members of Clinopyroxene Subgroup:
| Aegirine | NaFe3+Si2O6 | Mon. 2/m : B2/b |
| Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 | Mon. 2/m : B2/b |
| Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : B2/b |
| Burnettite | CaVAlSiO6 | Mon. 2/m : B2/b |
| Clinoenstatite | MgSiO3 | Mon. 2/m : P21/b |
| Clinoferrosilite | Fe2+2Si2O6 | Mon. 2/m : P21/b |
| Colomeraite | NaTi3+Si2O6 | Mon. 2/m : B2/b |
| Davisite | CaScAlSiO6 | Mon. 2/m : B2/b |
| Diopside | CaMgSi2O6 | Mon. 2/m : B2/b |
| Esseneite | CaFe3+[AlSiO6] | Mon. 2/m : B2/b |
| Grossmanite | CaTi3+ AlSiO6 | Mon. 2/m : B2/b |
| Hedenbergite | CaFe2+Si2O6 | Mon. 2/m : B2/b |
| Jadeite | Na(Al,Fe3+)Si2O6 | Mon. 2/m : B2/b |
| Jervisite | NaSc3+Si2O6 | Mon. 2/m : B2/b |
| Johannsenite | CaMn2+Si2O6 | Mon. 2/m : B2/b |
| Kanoite | Mn2+MgSi2O6 | Mon. 2/m : P21/b |
| Kosmochlor | NaCrSi2O6 | Mon. 2/m : B2/b |
| Kushiroite | CaAlAlSiO6 | Mon. 2/m : B2/b |
| Namansilite | NaMn3+Si2O6 | Mon. 2/m : B2/b |
| Natalyite | NaV3+Si2O6 | Mon. 2/m : B2/b |
| Omphacite | (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6 | Mon. 2/m |
| Petedunnite | CaZnSi2O6 | Mon. 2/m : B2/b |
| Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : P21/b |
| Ryabchikovite | CuMgSi2O6 | Mon. 2/m : P21/b |
| Spodumene | LiAlSi2O6 | Mon. 2/m : B2/b |
| 'UM2003-36-SiO:CaNa' | NaCrSi2O6 - CaMgSi2O6 | Mon. 2/m : B2/b |
Common Associates
Associations Based on Photo Data:
| 1 photo of Tissintite associated with 'Maskelynite' |
Related Minerals - Strunz-mindat Grouping
| 9.DA. | Colomeraite | NaTi3+Si2O6 |
| 9.DA. | Protoenstatite | Mg2Si2O6 |
| 9.DA. | Ryabchikovite | CuMgSi2O6 |
| 9.DA.05 | Donpeacorite | Mn2+MgSi2O6 |
| 9.DA.05 | Enstatite | Mg2Si2O6 |
| 9.DA.05 | Ferrosilite | Fe2+2Si2O6 |
| 9.DA.10 | Clinoenstatite | MgSiO3 |
| 9.DA.10 | Clinoferrosilite | Fe2+2Si2O6 |
| 9.DA.10 | Kanoite | Mn2+MgSi2O6 |
| 9.DA.10 | Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| 9.DA.15 | Grossmanite | CaTi3+ AlSiO6 |
| 9.DA.15 | Diopside | CaMgSi2O6 |
| 9.DA.15 va | 'Jeffersonite' | Ca(Mn,Zn,Fe)Si2O6 |
| 9.DA.15 | Hedenbergite | CaFe2+Si2O6 |
| 9.DA.15 | Johannsenite | CaMn2+Si2O6 |
| 9.DA.15 | Petedunnite | CaZnSi2O6 |
| 9.DA.15 | Esseneite | CaFe3+[AlSiO6] |
| 9.DA.15 | Kushiroite | CaAlAlSiO6 |
| 9.DA.15 | Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| 9.DA.15 | Davisite | CaScAlSiO6 |
| 9.DA.20 | Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
| 9.DA.20 | Omphacite | (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6 |
| 9.DA.25 | Jadeite | Na(Al,Fe3+)Si2O6 |
| 9.DA.25 | Namansilite | NaMn3+Si2O6 |
| 9.DA.25 | Natalyite | NaV3+Si2O6 |
| 9.DA.25 | Aegirine | NaFe3+Si2O6 |
| 9.DA.25 | Jervisite | NaSc3+Si2O6 |
| 9.DA.25 | Kosmochlor | NaCrSi2O6 |
| 9.DA.30 | Spodumene | LiAlSi2O6 |
| 9.DA.35 | Hiroseite | FeSiO3 |
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 Tissintite
mindat.org URL:
https://www.mindat.org/min-43890.html
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References for Tissintite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) New minerals and nomenclature modifications approved in 2013. CNMNC Newsletter No 16. Mineralogical Magazine, 77 (6) 2695-2709 doi:10.1180/minmag.2013.077.6.01
Ma, C.; Tschauner, O.; Liu, Y.; Beckett, J.R.; Rossman, G.R.; Zuravlev, K.; Prakapenka, V.; Dera, P.; Sinogeikin, S.; Smith, J.; et al. (2014) Discovery of Ahrensite γ-Fe2SiO4 and Tissintite (Ca,Na,□)AlSi2O6: Two New High Pressure Minerals from the Tissint Martian Meteorite. 45th Lunar and Planetary Science Conference, 1222pp.
Ma, Chi, Tschauner, Oliver, Beckett, John R., Liu, Yang, Rossman, George R., Zuravlev, Kirill, Prakapenka, Vitali, Dera, Przemyslaw, Sinogeikin, Stanislav, Smith, Jesse, Taylor, Lawrence A. (2014) First New Minerals from Mars: Discovery of Ahrensite γ-Fe2SiO4 and Tissintite (Ca,Na,□)AlSi2O6, Two High Pressure Phases from the Tissint Martian Meteorite. Eighth International Conference on Mars.
Ma, Chi, Tschauner, Oliver, Beckett, John R., Liu, Yang, Rossman, George R., Zhuravlev, Kirill, Prakapenka, Vitali, Dera, Przemyslaw, Taylor, Lawrence A. (2015) Tissintite, (Ca, Na, □)AlSi2O6, a highly-defective, shock-induced, high-pressure clinopyroxene in the Tissint martian meteorite. Earth and Planetary Science Letters, 422. 194-205 doi:10.1016/j.epsl.2015.03.057
Localities for Tissintite
Showing 6 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.
Canada | |
| Spray et al. (2023) |
Lithuania | |
| Miyahara et al. (2021) |
Morocco | |
| Pang et al. (2016) +1 other reference | |
| Williams et al. (2013) +1 other reference |
Nigeria | |
| Ma et al. (2024) |
Northwest Africa Meteorites | |
| Fudge et al. (2018) |
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Tissint Martian meteorite, Tata Cercle, Tata Province, Souss-Massa Region, Morocco