Sarp, H., Burri, G. (1986) Trabzonite Ca4Si3O10·2H2O a new hydrated calcium silicate. Schweizerische Mineralogische und Petrographische Mitteilungen: 66: 453-453.

Classification of TrabzoniteHide

Strunz-mindat (2026):

9.BJ.15

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si₃O₁₀, Si₄O₁₁, etc. anions; cations in octahedral [6] and greater coordination

Dana 8th ed.:

57.1.3.1

57 : SOROSILICATES Si₃O₁₀ Groups and Larger Noncyclic Groups
1 : Insular Si₃O₁₀ and Larger Noncyclic Groups with [Si₃O₁₀] groups

Hey's CIM Ref.:

14.5.20

14 : Silicates not Containing Aluminum
5 : Silicates of Ca

Mineral SymbolsHide

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

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Symbol	Source	Reference for Standard
Trb	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Trb	The Canadian Mineralogist (2019)	The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of TrabzoniteHide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Colourless

Streak:

White

Cleavage:

None Observed

Fracture:

Conchoidal

Density:

2.9 g/cm³ (Measured) 3.08 g/cm³ (Calculated)

Comment:

Measured by suspension

Optical Data of TrabzoniteHide

Type:

Biaxial (+)

RI values:

n_α = 1.632 n_β = 1.634 n_γ = 1.64

2V:

Measured: 55° to 60°, Calculated: 62°

Max. Birefringence:

δ = 0.008
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.

Thickness: 30 µm

Rotation:

Surface Relief:

Moderate

Dispersion:

weak to distinct

Chemistry of TrabzoniteHide

Mindat Formula:

Ca₄(Si₃O₉)(OH)₂

Element Weights:

Element	% weight
O	41.648 %
Ca	37.937 %
Si	19.939 %
H	0.477 %

Calculated from ideal end-member formula.

Elements listed:

Ca, H, O, Si - search for minerals with similar chemistry

Common Impurities:

Al,Mn,Mg,Na

Crystallography of TrabzoniteHide

Crystal System:

Orthorhombic

Class (H-M):

mm2 - Pyramidal

Space Group:

Ama2

Cell Parameters:

a = 20.6 Å, b = 9.1 Å, c = 10.3 Å
β = 98°

Ratio:

a:b:c = 2.264 : 1 : 1.132

Unit Cell V:

1,930.84 Å³ (Calculated from Unit Cell)

Comment:

Originally assumed to be P21/m.

Crystal StructureHide

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Unit Cell | Unit Cell Packed
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View
CIF File Best | x | y | z | a | b | c

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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)
0018996	Trabzonite	Armbruster T, Lazic B, Galuskina I O, Galuskin E V, Gnos E, Marzec K M, Gazeev V M (2012) Trabzonite, Ca4[Si3O9(OH)]OH: crystal structure, revised formula, new occurrence and relation to killalaite Mineralogical Magazine 76 455-472		2012	Ikizdere, Turkey	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Trabzonite'
loop_
_publ_author_name
'Armbruster T'
'Lazic B'
'Galuskina I O'
'Galuskin E V'
'Gnos E'
'Marzec K M'
'Gazeev V M'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 76 
_journal_year 2012
_journal_page_first 455
_journal_page_last 472
_publ_section_title
;
 Trabzonite, Ca4[Si3O9(OH)]OH: crystal structure, revised formula, new occurrence
 and relation to killalaite
;
_database_code_amcsd 0018996
_chemical_compound_source 'Ikizdere, Turkey'
_chemical_formula_sum 'Ca4 Si3 O11 H2'
_cell_length_a 20.5805
_cell_length_b 10.3240
_cell_length_c 9.1053
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1934.631
_exptl_crystal_density_diffrn      2.902
_symmetry_space_group_name_H-M 'A m a 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  '-x,-y,z'
  '-x,1/2-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Ca1   0.35412   0.09773   0.05961   0.01130
Ca2   0.36296   0.09381   0.43914   0.01050
Ca3   0.25000   0.11905  -0.26110   0.01460
Ca4   0.50000   0.00000   0.62350   0.01240
Ca5   0.25000  -0.16686  -0.05094   0.01180
Ca6   0.50000   0.00000   0.21685   0.01070
Si1   0.37313  -0.11729  -0.24190   0.00890
Si2   0.49671   0.21342  -0.09381   0.00830
Si3   0.37396  -0.19912   0.24840   0.00980
O1   0.47470   0.14200   0.42740   0.01180
O2   0.46420   0.14750   0.04560   0.01370
O3   0.44170   0.21720   0.76990   0.01460
O4   0.44630  -0.11720  -0.16390   0.01400
O5   0.38970  -0.04760   0.23820   0.01200
O6   0.33860  -0.25730  -0.23480   0.01170
O7   0.33120  -0.25600   0.11790   0.01050
O8   0.32620  -0.01700  -0.15410   0.01080
O9   0.38810   0.93110   0.59320   0.01390
O10   0.32970   0.77730   0.39990   0.01460
O11   0.25000   0.01540   0.10620   0.01890
O12   0.25000   0.05040   0.48350   0.01890
H10   0.34800   0.81900   0.48500   0.05000
H11   0.25000   0.01900   0.21100   0.05000
H12   0.25000  -0.04000   0.45700   0.05000
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
Ca1 0.01050 0.01200 0.01140 -0.00060 -0.00230 0.00060
Ca2 0.01010 0.01010 0.01120 0.00140 0.00070 0.00100
Ca3 0.00950 0.01640 0.01780 0.00000 0.00000 0.00640
Ca4 0.00910 0.01830 0.00980 -0.00260 0.00000 0.00000
Ca5 0.00830 0.01200 0.01520 0.00000 0.00000 0.00360
Ca6 0.01080 0.01140 0.01010 0.00030 0.00000 0.00000
Si1 0.00900 0.00810 0.00950 0.00010 0.00080 0.00030
Si2 0.00770 0.00780 0.00940 -0.00130 0.00020 0.00020
Si3 0.01050 0.00940 0.00960 -0.00080 -0.00110 0.00020
O1 0.01500 0.01000 0.01040 -0.00050 -0.00280 0.00040
O2 0.01600 0.01380 0.01100 0.00020 0.00360 0.00400
O3 0.01400 0.01560 0.01400 0.00290 -0.00140 -0.00020
O4 0.00800 0.01430 0.01900 0.00000 -0.00550 0.00150
O5 0.01300 0.00930 0.01320 -0.00140 -0.00270 0.00040
O6 0.01400 0.00880 0.01200 -0.00030 -0.00080 0.00010
O7 0.00800 0.01400 0.00960 -0.00170 -0.00480 -0.00120
O8 0.00900 0.01000 0.01400 0.00070 0.00020 0.00030
O9 0.01300 0.01700 0.01200 -0.00260 0.00030 0.00420
O10 0.01400 0.01500 0.01400 -0.00110 0.00470 -0.00110
O11 0.01400 0.02100 0.02100 0.00000 0.00000 -0.00400
O12 0.01600 0.01600 0.02500 0.00000 0.00000 -0.00200

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.062 Å	(100)
2.585 Å	(90)
3.442 Å	(60)
2.851 Å	(50)
2.635 Å	(50)
5.71 Å	(35)
2.912 Å	(30)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-? alteration and/or metamorphism
31 : Thermally altered carbonate, phosphate, and iron formations

Type Occurrence of TrabzoniteHide

Type Locality:

ⓘ Güneyce-Ikizdere, Rize Province, Turkey

General Appearance of Type Material:

Irregular grains to 0.2 mm.

Place of Conservation of Type Material:

Natural History Museum, Geneva, Switzerland, 435/78.

Geological Setting of Type Material:

Retrograde skarn.

Associated Minerals at Type Locality:

Spurrite	Calcite	Vesuvianite	Hillebrandite	Defernite
Tobermorite	Killalaite	Perovskite	Molybdenite

Reference:

Sarp, H., Burri, G. (1986) Trabzonite Ca4Si3O10·2H2O a new hydrated calcium silicate. Schweizerische Mineralogische und Petrographische Mitteilungen: 66: 453-453.

Synonyms of TrabzoniteHide

IMA1983-071a

Other Language Names for TrabzoniteHide

Dutch:Trabzoniet

German:Trabzonit

Spanish:Trabzonita

Related Minerals - Strunz-mindat Grouping Hide

9.BJ.	Arsenmedaite	Mn²⁺₆ As⁵⁺Si₅O₁₈(OH)	Mon. 2/m
9.BJ.05	Orientite	Ca₈Mn³⁺₁₀(SiO₄)₃(Si₃O₁₀)₃(OH)₁₀ · 4H₂O	Orth. mmm(2/m2/m2/m)
9.BJ.10	Rosenhahnite	HCa₃[Si₃O₉(OH)]	Tric. 1 : P1
9.BJ.20	Thalénite-(Y)	Y₃Si₃O₁₀F	Mon. 2/m : P2₁/b
9.BJ.25	Tiragalloite	Mn²⁺₄As⁵⁺Si₃O₁₂(OH)	Mon. 2/m
9.BJ.30	Medaite	Mn²⁺₆V⁵⁺Si₅O₁₈(OH)	Mon. 2/m
9.BJ.35	Strontioruizite	Sr₂Mn³⁺₂Si₄O₁₁(OH)₄ · 2H₂O	Mon. 2 : B2
9.BJ.35	Ruizite	Ca₂Mn³⁺₂[Si₄O₁₁(OH)₂](OH)₂ · 2H₂O	Mon. 2
9.BJ.35	Taniajacoite	SrCaMn³⁺₂Si₄O₁₁(OH)₄ · 2H₂O	Tric. 1
9.BJ.40	Ardennite-(As)	Mn²⁺₄Al₄(AlMg)(AsO₄)(SiO₄)₂(Si₃O₁₀)(OH)₆	Orth. mmm(2/m2/m2/m)
9.BJ.40	Kannanite	Ca₄Al₄(AlMg)(VO₄)(SiO₄)₂(Si₃O₁₀)(OH)₆	Orth. mmm(2/m2/m2/m) : Pmmn
9.BJ.40	Alpeite	Ca₄Mn³⁺₂Al₂(Mn³⁺Mg)(SiO₄)₂(Si₃O₁₀)(V⁵⁺O₄)(OH)₆	Orth. mmm(2/m2/m2/m) : Pmmn
9.BJ.40	Ardennite-(V)	Mn²⁺₄Al₄(AlMg)(VO₄)(SiO₄)₂(Si₃O₁₀)(OH)₆	Orth. mmm(2/m2/m2/m) : Pmmn
9.BJ.45	Kilchoanite	Ca₆(SiO₄)(Si₃O₁₀)	Orth. mmm(2/m2/m2/m)
9.BJ.50	Prismatine	(◻,Fe,Mg)(Mg,Al,Fe)₅Al₄Si₂(Si,Al)₂(B,Si,Al)(O,OH,F)₂₂	Orth. mmm(2/m2/m2/m) : Cmcm
9.BJ.50	Kornerupine	Mg₃Al₆(Si,Al,B)₅O₂₁(OH)	Orth. mmm(2/m2/m2/m) : Cmcm
9.BJ.55	Zunyite	Al₁₃Si₅O₂₀(OH,F)₁₈Cl	Iso. 43m : F43m
9.BJ.60	Hubeite	Ca₂Mn²⁺Fe³⁺Si₄O₁₂(OH) · 2H₂O	Tric. 1 : P1
9.BJ.65	Cassagnaite	(Ca,Mn²⁺)₄(Fe³⁺,Mn³⁺,Al)₄(V³⁺,Mg,Al)₂(Si₃O₁₀)(SiO₄)₂(OH,O)₈	Orth. mmm(2/m2/m2/m) : Cmcm
9.BJ.70	Pavlovskyite	Ca₈(SiO₄)₂(Si₃O₁₀)	Orth. mmm(2/m2/m2/m) : Pbcn

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 TrabzoniteHide

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https://www.mindat.org/min-4005.html
Please feel free to link to this page.

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External Links:

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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

Mineral Dealers:

Buy from D. Joyce minerals

References for TrabzoniteHide

Reference List:

Sarp, H., Burri, G. (1986) Trabzonite Ca4Si3O10·2H2O a new hydrated calcium silicate. Schweizerische Mineralogische und Petrographische Mitteilungen: 66: 453-453.

Sarp H, Burri G (1987) Yeni bir mineral, trabzonit, Ca4 Si3 O10 2H2O. Bulletin of the Geological Society of Turkey 30, 57-60

Jambor, John L., Ercit, Ernst A. J. Burke T. Scott, Grice, Joel D. (1988) New Mineral Names. American Mineralogist, 73 (11-12) 1492-1499

(2001) Trabzonite. Handbook of Mineralogy. Mineralogical Society of America

Armbruster, T., Lazic, B., Gfeller, F., Galuskin, E. V., Galuskina, I. O., Savelyeva, V. B., Zadov, A. E., Pertsev, N. N., Dzierżanowski, P. (2011) Chlorine content and crystal chemistry of dellaite from the Birkhin gabbro massif, Eastern Siberia, Russia. Mineralogical Magazine, 75 (2) 379-394 doi:10.1180/minmag.2011.075.2.379

Armbruster, T., Lazic, B., Galuskina, I. O., Galuskin, E. V., Gnos, E., Marzec, K. M., Gazeev, V. M. (2012) Trabzonite, Ca₄[Si₃O₉(OH)]OH: crystal structure, revised formula, new occurrence and relation to killalaite. Mineralogical Magazine, 76 (3) 455-472 doi:10.1180/minmag.2012.076.3.02

Localities for TrabzoniteHide

Showing 6 localities.

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.

Hide all sections | Show all sections

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.


Russia
Kabardino-Balkaria Chegemsky District ⓘ Upper Chegem volcanic caldera (Verkhnechegemskaya caldera)	Galuskin et al. (2012)
ⓘ Lakargi Mountain	Armbruster et al. (2012)
ⓘ Xenolith no. 1	Galuskina et al. (2015)
ⓘ Xenolith no. 3	Armbruster et al. (2012)
ⓘ Xenolith no. 5	Armbruster et al. (2012)

Turkey (TL)
Rize Province ⓘ Güneyce-Ikizdere (TL)	Am Min 73:11-12 p 1497 +4 other references

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Trabzonite

About TrabzoniteHide

Unique IdentifiersHide

IMA Classification of TrabzoniteHide

Classification of TrabzoniteHide

Mineral SymbolsHide

Physical Properties of TrabzoniteHide

Optical Data of TrabzoniteHide

Chemistry of TrabzoniteHide

Crystallography of TrabzoniteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of TrabzoniteHide

Synonyms of TrabzoniteHide

Other Language Names for TrabzoniteHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for TrabzoniteHide

References for TrabzoniteHide

Localities for TrabzoniteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide