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Trabzonite

Formula:
Ca
 
4
Si
 
3
O
 
10
·2H
 
2
O
System:MonoclinicColour:Colourless
Name:Named after its discovery locality, Ikizdere, NW of Varda Yaylasi, near Trabzon, Turkey.
This page provides mineralogical data about Trabzonite.

Classification of Trabzonite

IMA status:Approved 1983
Strunz 8th edition ID:8/C.28-20
Nickel-Strunz 10th (pending) edition ID:9.BJ.15

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
Dana 8th edition ID: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
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Type Occurrence of Trabzonite

Type Locality:Güneyce-Ikizdere, Rize Province, Black Sea Region, Turkey
Year of Discovery:1986

Physical Properties of Trabzonite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless

Crystallography of Trabzonite

Crystal System:Monoclinic
Cell Parameters:a = 6.89Å, b = 20.64Å, c = 6.92Å
β = 98°
Ratio:a:b:c = 0.334 : 1 : 0.335
Unit Cell Volume:V 974.51 ų (Calculated from Unit Cell)

Optical Data of Trabzonite

Type:Biaxial (+)
RI values: nα = 1.632 nβ = 1.634 nγ = 1.640
2V:Measured: 55° to 60°, Calculated: 62°
Maximum Birefringence:δ = 0.008

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:weak to distinct

Chemical Properties of Trabzonite

Formula:
Ca
 
4
Si
 
3
O
 
10
·2H
 
2
O
Essential elements:Ca, H, O, Si
All elements listed in formula:Ca, H, O, Si
Common Impurities:Al,Mn,Mg,Na

Relationship of Trabzonite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.BJ.05Orientite
Ca
 
2
MnMn
 
2
Si
 
3
O
 
10
(OH)
 
4
9.BJ.10Rosenhahnite
HCa
 
3
[Si
 
3
O
 
9
(OH)]
9.BJ.20Thalénite-(Y)
Y
 
3
Si
 
3
O
 
10
(OH)
9.BJ.20Fluorthalénite-(Y)
Y
 
3
Si
 
3
O
 
10
F
9.BJ.25Tiragalloite
Mn
 
4
AsSi
 
3
O
 
12
(OH)
9.BJ.30Medaite
(Mn,Ca)
 
6
(V,As)Si
 
5
O
 
18
OH
9.BJ.35Ruizite
Ca
 
2
Mn
3+
2
[(OH)
 
2
|H
 
2
Si
 
4
O
 
13
] · 2H
 
2
O
9.BJ.40Ardennite-(As)
Mn
2+
4
[(Al,Mg)
 
6
][(OH)
 
6
|(AsO
 
4
,VO
 
4
)|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]
9.BJ.40Ardennite-(V)
Mn
2+
4
[Al
 
4
(Mg,Al,Fe
3+
 
,Mn
3+
 
)
 
2
][(OH)
 
6
|(VO
 
4
,SiO
 
4
)|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]
9.BJ.45Kilchoanite
Ca
 
3
Si
 
2
O
 
7
9.BJ.50Kornerupine
Mg
 
3
Al
 
6
(Si,Al,B)
 
5
O
 
21
(OH)
9.BJ.50Prismatine
([ ],Fe,Mg)(Mg,Al,Fe)
 
5
Al
 
4
Si
 
2
(Si,Al)
 
2
(B,Si,Al)(O,OH,F)
 
22
9.BJ.55Zunyite
Al
 
13
Si
 
5
O
 
20
(OH,F)
 
18
Cl
9.BJ.60Hubeite
Ca
 
2
Mn
2+
 
Fe
3+
 
[HSi
 
4
O
 
13
] · 2H
 
2
O
9.BJ.65Cassagnaite
(Ca,Mn
2+
 
)
 
4
(Fe
3+
 
,Mn
3+
 
,Al)
 
4
(V
3+
 
,Mg,Al)
 
2
[(O,OH)
 
4
|(OH)
 
4
|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]
Related Minerals - Hey's Index Grouping:

- +
14.5.1Wollastonite
Ca[SiO
 
3
]
14.5.2Wollastonite-7T
14.5.3Wollastonite-2M
CaSiO
 
3
14.5.4Rankinite
Ca
 
3
Si
 
2
O
 
7
14.5.5Kilchoanite
Ca
 
3
Si
 
2
O
 
7
14.5.6Larnite
Ca
 
2
[SiO
 
4
]
14.5.7Bredigite
Ca
 
7
Mg[SiO
 
4
]
 
4
14.5.8Hatrurite
Ca
 
3
[O|SiO
 
4
]
14.5.9Rosenhahnite
HCa
 
3
[Si
 
3
O
 
9
(OH)]
14.5.10Dellaite
Ca
 
6
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
14.5.11Afwillite
Ca
 
3
[HSiO
 
4
]
 
2
 · 2H
 
2
O
14.5.12Xonotlite
Ca
 
6
Si
 
6
O
 
17
(OH)
 
2
14.5.13Foshagite
Ca
 
4
[(OH)
 
2
|Si
 
3
O
 
9
]
14.5.14Hillebrandite
Ca
 
2
[(OH)
 
2
|SiO
 
3
]
14.5.15Jaffeite
Ca
 
6
[(OH)
 
6
|Si
 
2
O
 
7
]
14.5.16Suolunite
Ca
 
2
[H
 
2
Si
 
2
O
 
7
] · H
 
2
O
14.5.17Killalaite
Ca
 
3
[Si
 
2
O
 
7
] · 0.5H
 
2
O
14.5.18Okenite
CaSi
 
2
O
 
5
·2H
 
2
O
14.5.19Riversideite
Ca
 
5
Si
 
6
O
 
16
(OH)
 
2
·2H
 
2
O
14.5.21Gyrolite
Ca
 
4
(Si
 
6
O
 
15
)(OH)
 
2
·3H
 
2
O
14.5.22Foshallasite
Ca
 
3
[Si
 
2
O
 
7
] · 3H
 
2
O(?)
14.5.23Tobermorite
Ca
 
5
Si
 
6
(O,OH)
 
18
·5H
 
2
O
14.5.24Clinotobermorite
Ca
 
5
[Si
 
3
O
 
8
(OH)
 
2
]2.4H
 
2
O - Ca
 
5
[Si
 
6
O
 
17
]·5H
 
2
O
14.5.25Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
14.5.26Plombièrite
Ca
 
5
Si
 
6
O
 
16
(OH)
 
2
·7H
 
2
O
14.5.27Jennite
Ca
 
9
H
 
2
Si
 
6
O
 
18
(OH)
 
8
·6H
 
2
O

Other Names for Trabzonite

Synonyms:
IMA1983-071a
Other Languages:
German:Trabzonit
Spanish:Trabzonita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Trabzonite

Reference List:Schweizerische mineralogische und petrographische Mitteilungen (1986): 66:
453.

American Mineralogist (1988): 73: 1497.

Internet Links for Trabzonite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Trabzonite in the Natural History Museum (London) online catalogue
  • Trabzonite details from Handbook of Mineralogy (PDF)
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    Localities for Trabzonite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Turkey
     
    • Black Sea Region
      • Rize Province
    		Am Min 73:11-12 p 1497
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 10th Oct 2009 03:55:39