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Trimounsite-(Y)

A valid IMA mineral species

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Photos of Trimounsite-(Y) (9)

Trimounsite-(Y) Gallery Search Photos of Trimounsite-(Y)

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Trimounsite-(Y)

Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

Trimounsite-(Y)

Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

Trimounsite-(Y), etc.

Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

Trimounsite-(Y)

Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

Trimounsite-(Y)

Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

Trimounsite-(Y), etc.

Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

Trimounsite-(Y)

Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

Trimounsite-(Y)

Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

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About Trimounsite-(Y)Hide

Trimouns Quarry, sept. 1998

Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

Formula:

Y₂Ti₂(SiO₄)O₅

Colour:

Light brown

Lustre:

Adamantine

Hardness:

Specific Gravity:

5.0

Crystal System:

Monoclinic

Name:

Named after its discovery locality, Trimouns talc deposit, near Luzenac, Ariege, France.

Type Locality:

ⓘ Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

This page provides mineralogical data about Trimounsite-(Y).

Unique IdentifiersHide

Mindat ID:

4019

Long-form identifier:

mindat:1:1:4019:4

GUID
(UUID V4):

b01f1d29-1504-483d-9a0c-ff1ae545c144

IMA Classification of Trimounsite-(Y)Hide

IMA status:

Approved

IMA Formula:

Y₂Ti₂SiO₉

Approval year:

1989

First published:

1990

Type description reference:

Piret, Paul, Deliens, Michel, Pinet, Michèle (1990) La trimounsite-(Y), nouveau silicotitanate de terres rares de Trimouns, Ariège, France: (TR)2Ti2SiO9. European Journal of Mineralogy, 2 (5) 725-729 doi:10.1127/ejm/2/5/0725

Classification of Trimounsite-(Y)Hide

Strunz-mindat (2024):

9.AG.25

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination

Dana 8th ed.:

52.4.8.1

52 : NESOSILICATES Insular SiO₄ Groups and O,OH,F,H₂O
4 : Insular SiO₄ Groups and O, OH, F, and H₂O with cations in [6] and/or >[6] coordination

Hey's CIM Ref.:

14.9.21

14 : Silicates not Containing Aluminum
9 : Silicates of Ti

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Tmo-Y	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 Trimounsite-(Y)Hide

Lustre:

Adamantine

Transparency:

Transparent, Translucent

Colour:

Light brown

Streak:

white

Hardness:

7 on Mohs scale

Tenacity:

Brittle

Density:

5.0(1) g/cm³ (Measured) 4.85 g/cm³ (Calculated)

Optical Data of Trimounsite-(Y)Hide

Type:

Biaxial (-)

RI values:

n_α = 2.100

Max Birefringence:

δ = 2.100

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Moderate

Dispersion:

r < v extreme

Comments:

RIs >2.10

Chemistry of Trimounsite-(Y)Hide

Mindat Formula:

Y₂Ti₂(SiO₄)O₅

Elements listed:

O, Si, Ti, Y - search for minerals with similar chemistry

Crystallography of Trimounsite-(Y)Hide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Space Group:

P2₁/b

Setting:

P2₁/c

Cell Parameters:

a = 12.299(2) Å, b = 11.120(2) Å, c = 4.854(1) Å
β = 95.62(1)°

Ratio:

a:b:c = 1.106 : 1 : 0.437

Unit Cell V:

660.67 Å³ (Calculated from Unit Cell)

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0006894	Trimounsite-(Y)	Kolitsch U (2001) The crystal structure of trimounsite-(Y), (Y,REE)2Ti2SiO9: an unusual TiO6-based titanate chain European Journal of Mineralogy 13 761-768		2001		0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Trimounsite-(Y)'
loop_
_publ_author_name
'Kolitsch U'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 13 
_journal_year 2001
_journal_page_first 761
_journal_page_last 768
_publ_section_title
;
 The crystal structure of trimounsite-(Y), (Y,REE)2Ti2SiO9:
 an unusual TiO6-based titanate chain
;
_database_code_amcsd 0006894
_chemical_formula_sum '(Y1.534 Er.466) Ti2 Si O9'
_cell_length_a 12.293
_cell_length_b 11.124
_cell_length_c 4.8610
_cell_angle_alpha 90
_cell_angle_beta 95.69
_cell_angle_gamma 90
_cell_volume 661.454
_exptl_crystal_density_diffrn      4.842
_symmetry_space_group_name_H-M 'P 1 21/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Y1   0.57800   0.86180  -0.01444   0.76400   0.01328
Er1   0.57800   0.86180  -0.01444   0.23600   0.01328
Y2  -0.06934   0.85876   0.05361   0.77000   0.01330
Er2  -0.06934   0.85876   0.05361   0.23000   0.01330
Ti1   0.36059   0.66364  -0.16513   1.00000   0.01331
Ti2   0.15006   0.66317   0.19889   1.00000   0.01313
Si   0.75231   0.90568  -0.42860   1.00000   0.01390
O1   0.64410   0.66400  -0.06230   1.00000   0.01600
O2  -0.13500   0.65930   0.00500   1.00000   0.01740
O3   0.75360   0.90150  -0.09380   1.00000   0.01620
O4   0.25439   0.55090   0.02110   1.00000   0.01500
O5   0.43790   0.54840  -0.30260   1.00000   0.01640
O6   0.44720   0.71160   0.16750   1.00000   0.01430
O7   0.25539   0.79230   0.01710   1.00000   0.01440
O8   0.06650   0.55230   0.32760   1.00000   0.01660
O9   0.06450   0.71060  -0.13380   1.00000   0.01470
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Y1 0.01340 0.01310 0.01321 0.00001 0.00079 0.00025
Er1 0.01340 0.01310 0.01321 0.00001 0.00079 0.00025
Y2 0.01340 0.01310 0.01335 -0.00008 0.00094 0.00042
Er2 0.01340 0.01310 0.01335 -0.00008 0.00094 0.00042
Ti1 0.01330 0.01470 0.01180 0.00050 0.00090 -0.00010
Ti2 0.01340 0.01400 0.01210 -0.00020 0.00130 0.00040
Si 0.01360 0.01400 0.01400 0.00000 0.00110 -0.00020
O1 0.01390 0.01720 0.01660 0.00170 0.00010 0.00030
O2 0.01660 0.01730 0.01850 -0.00140 0.00270 -0.00040
O3 0.01540 0.02010 0.01280 -0.00080 0.00010 0.00160
O4 0.01680 0.01290 0.01610 -0.00110 0.00550 -0.00240
O5 0.01650 0.01590 0.01720 -0.00070 0.00270 -0.00190
O6 0.01530 0.01520 0.01230 0.00250 0.00080 -0.00080
O7 0.01480 0.01610 0.01190 -0.00050 -0.00070 -0.00030
O8 0.01780 0.01460 0.01760 0.00140 0.00250 0.00200
O9 0.01510 0.01640 0.01260 -0.00200 0.00100 0.00060

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.820 Å	(100)
3.44 Å	(90)
1.959 Å	(60)
1.643 Å	(60)
2.117 Å	(50)
1.628 Å	(50)
2.777 Å	(40)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4b: Highly evolved igneous rocks	>3.0
34 : Complex granite pegmatites

Type Occurrence of Trimounsite-(Y)Hide

Type Locality:

ⓘ Trimouns Talc Mine, Luzenac, Foix, Ariège, Occitanie, France

Place of Conservation of Type Material:

Royal Institute of Natural Sciences of Belgium, Brussels, Belgium, RC3967.

Geological Setting of Type Material:

dolomitic portions of a talc deposit.

Associated Minerals at Type Locality:

Synchysite	Parisite	Monazite	Dolomite	Calcite
Bastnäsite	Allanite Group

Reference:

Piret, P., Deliens, M., Pinet, M. (1990) La trimounsite-(Y), nouveau silicotitanate de terres rares de Trimouns, Ariège, France: (TR)2Ti2SiO9. European Journal of Mineralogy: 2: 725-729.

Download:

http://rruff.info/rruff_1.0/uploads/EJM2_725.pdf

Synonyms of Trimounsite-(Y)Hide

IMA1989-042

Other Language Names for Trimounsite-(Y)Hide

German:Trimounsit-(Y)

Russian:Тримунсит-(Y)

Common AssociatesHide

Associated Minerals Based on Photo Data:

2 photos of Trimounsite-(Y) associated with Talc	Mg₃Si₄O₁₀(OH)₂
2 photos of Trimounsite-(Y) associated with Dolomite	CaMg(CO₃)₂
1 photo of Trimounsite-(Y) associated with Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈

Related Minerals - Strunz-mindat Grouping Hide

9.AG.	Ivanyukite-Na-T	Na₂Ti₄(SiO₄)₃(OH)O₃ · 7H₂O	Trig. 3m : R3m
9.AG.	Ivanyukite-Na-C	Na₂Ti₄(SiO₄)₃(OH)₂O₂ · 6H₂O	Iso. 4 3m : P4 3m
9.AG.	Edgrewite	Ca₉(SiO₄)₄F₂	Mon. 2/m : P2₁/b
9.AG.	Aluminotaipingite-(CeCa)	(Ce₆Ca₃)◻Al(SiO₄)₃[SiO₃(OH)]₄F₃	Trig. 3m : R3c
9.AG.02	Gatedalite	ZrMn²⁺₂Mn³⁺₄SiO₁₂	Tet. 4/mmm (4/m 2/m 2/m) : I4₁/acd
9.AG.05	Abswurmbachite	CuMn³⁺₆(SiO₄)O₈	Tet. 4/mmm (4/m 2/m 2/m) : I4₁/acd
9.AG.05	Braunite	Mn²⁺Mn³⁺₆(SiO₄)O₈	Tet. 4/mmm (4/m 2/m 2/m) : I4₁/acd
9.AG.05	Neltnerite	CaMn³⁺₆(SiO₄)O₈	Tet. 4/mmm (4/m 2/m 2/m) : I4₁/acd
9.AG.05	Braunite-II	CaMn³⁺₁₄(SiO₄)O₂₀	Tet. 4/mmm (4/m 2/m 2/m) : I4₁/acd
9.AG.10	Långbanite	Mn²⁺₄Mn³⁺₉Sb⁵⁺O₁₆(SiO₄)₂	Trig. 3m : P3m1
9.AG.12	Taipingite-(CeCa)	(Ce₇Ca₂)◻Mg(SiO₄)₃[SiO₃(OH)]₄F₃	Trig. 3m : R3c
9.AG.15	Malayaite	CaSn(SiO₄)O	Mon. 2/m
9.AG.15	Titanite	CaTi(SiO₄)O	Mon. 2/m : P2₁/b
9.AG.15	Vanadomalayaite	CaV⁴⁺(SiO₄)O	Mon. 2/m : B2/b
9.AG.15	Natrotitanite	(Na_0.5Y_0.5)Ti(SiO₄)O	Mon. 2/m : B2/b
9.AG.15	Żabińskiite	Ca[Al_0.5(Ta,Nb)_0.5)](SiO₄)O	Tric. 1
9.AG.20	Cerite-(CeCa)	(Ce₇Ca₂)◻Mg(SiO₄)₃(SiO₃OH)₄(OH)₃	Trig. 3m : R3c
9.AG.20	Ferricerite-(LaCa)	(La₆Ca₃)◻Fe³⁺(SiO₄)₃(SiO₃OH)₄(OH)₃	Trig. 3m : R3c
9.AG.20	Aluminocerite-(CeCa)	(Ce₆Ca₃)◻Al(SiO₄)₃[SiO₃(OH)]₄(OH)₃	Trig. 3m : R3c
9.AG.25	Yftisite-(Y)	(Y,Dy,Er)₄(Ti,Sn)(SiO₄)₂O(F,OH)₆
9.AG.25	Mieite-(Y)	Y₄Ti(SiO₄)₂O[F,(OH)]₆	Orth. mmm (2/m 2/m 2/m) : Cmcm
9.AG.30	Sitinakite	KNa₂Ti₄(SiO₄)₂O₅(OH) · 4H₂O	Tet. 4/mmm (4/m 2/m 2/m) : P4₂/mcm
9.AG.35	Kittatinnyite	Ca₂Mn₂Mn(SiO₄)₂(OH)₄ · 9H₂O	Hex.
9.AG.40a	Natisite	Na₂Ti(SiO₄)O	Tet. 4/mmm (4/m 2/m 2/m)
9.AG.40b	Paranatisite	Na₂Ti(SiO₄)O	Orth. mmm (2/m 2/m 2/m) : Pmma
9.AG.45	Törnebohmite-(Ce)	Ce₂Al(SiO₄)₂(OH)	Mon. 2/m : P2₁/b
9.AG.45	Törnebohmite-(La)	La₂Al(SiO₄)₂(OH)
9.AG.50	Kuliokite-(Y)	Y₄Al(SiO₄)₂(OH)₂F₅	Tric. 1 : P1
9.AG.50	Ivanyukite-Na	Na₂Ti₄(SiO₄)₃(OH)₂O₂ · 6H₂O	Trig. 3m : R3m
9.AG.50	Ivanyukite-K	K₂Ti₄(SiO₄)₃(OH)₂O₂ · 9H₂O	Iso. 4 3m : P4 3m
9.AG.50	Ivanyukite-Cu	CuTi₄(SiO₄)₃(OH)₂O₂ · 7H₂O	Iso. 4 3m : P4 3m
9.AG.50	Hydroxyledgrewite	Ca₉(SiO₄)₄(OH)₂	Mon. 2/m : P2₁/b
9.AG.52	Ulfanderssonite-(Ce)	(Ce₁₅Ca)_Σ16Mg₂(SiO₄)₁₀(SiO₃OH)(OH,F)₅Cl₃	Mon. m : Bm
9.AG.55	Chantalite	CaAl₂(SiO₄)(OH)₄	Tet. 4/m : I4₁/a
9.AG.60	Mozartite	CaMn³⁺(SiO₄)(OH)	Orth. 2 2 2 : P2₁ 2₁ 2₁
9.AG.60	Vuagnatite	CaAl(SiO₄)(OH)	Orth. 2 2 2 : P2₁ 2₁ 2₁
9.AG.65	Hatrurite	Ca₃(SiO₄)O	Trig.
9.AG.70	Jasmundite	Ca₁₁(SiO₄)₄O₂S	Tet. 4 2m : I4m2
9.AG.75	Afwillite	Ca₃(HSiO₄)₂ · 2H₂O	Mon. m : Bb
9.AG.80	Bultfonteinite	Ca₂(HSiO₄)F · H₂O	Tric. 1 : P1
9.AG.85	Zoltaiite	BaV⁴⁺₂V³⁺₁₂(SiO₄)₂O₁₉	Trig. 3 : P3
9.AG.90	Tranquillityite	(Fe²⁺,Ca)₈(Zr,Y)₂Ti₃(SiO₄)₃O₁₂	Hex.

Other InformationHide

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 Trimounsite-(Y)Hide

mindat.org URL:

https://www.mindat.org/min-4019.html
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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for Trimounsite-(Y)Hide

Reference List:

Jambor, John L., Burke, Ernst A. J. (1991) New Mineral Names. American Mineralogist, 76 (11-12) 2020-2026

New Minerals (1997), New Minerals 1990-1994.

Kolitsch, U. (2001) The crystal structure of trimounsite-(Y), (Y,REE)2Ti2SiO9. European Journal of Mineralogy: 13: 761-768.

virtualcollections.naturalsciences.be (n.d.) http://virtualcollections.naturalsciences.be/virtual-collections/geology/mineralogy/mineralogy-types/trimounsite-y-rc3967

(2023) Trimounsite-(Y) Handbook of Mineralogy. Mineralogical Society of America

Localities for Trimounsite-(Y)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- 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). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

France (TL)

Occitanie

Ariège

Foix

Luzenac

ⓘ Trimouns Talc Mine (TL)

Piret et al. (1990) +1 other reference

Trimounsite-(Y)

About Trimounsite-(Y)Hide

Unique IdentifiersHide

IMA Classification of Trimounsite-(Y)Hide

Classification of Trimounsite-(Y)Hide

Mineral SymbolsHide

Physical Properties of Trimounsite-(Y)Hide

Optical Data of Trimounsite-(Y)Hide

Chemistry of Trimounsite-(Y)Hide

Crystallography of Trimounsite-(Y)Hide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of Trimounsite-(Y)Hide

Synonyms of Trimounsite-(Y)Hide

Other Language Names for Trimounsite-(Y)Hide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for Trimounsite-(Y)Hide

References for Trimounsite-(Y)Hide

Localities for Trimounsite-(Y)Hide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide