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Clinotobermorite (Clinotobermorit)

Collectors Summary

Color frablos, weiß
Lustre Glasglanz
Hardness (Mohs) 4.5
Solubility +++ Säuren
Crystal System monoklin, Cc

Additional information / Summary

Klinotobermorit Ca5Si6O17·5H2O , ist ein dimorph von Tobermorit mit einer monoklinen Unterzellensymmetrie.

Chemism

Chemical formula

Ca5Si6O17·5H2O

Chemical composition

Calcium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 730.97211 u; Number of atoms in the formula: 43

Info

Empirical formula:

Ca5Si6O17·5H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.38

10

23.26

1.0079470

10.0794700
Oxygen

O

48.15

22

51.16

15.9994300

351.9874600
Silicon

Si

23.05

6

13.95

28.0855300

168.5131800
Calcium

Ca

27.41

5

11.63

40.0784000

200.3920000

Analysis wt%

SiO2 : 46.55, CaO : 39.04, H2O : 13.75 (Ref: Mineralogical Magazine 92)

Strunz 9th edition incl. updates

9.DG.10

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
G: Ketten- und Bandsilikate mit 3-periodischen Einfach- und Mehrfachketten
10:Tobermorit-Gruppe

Lapis Classification

VIII/F.19-025

VIII: SILIKATE
F: Ketten- und Bandsilikate
19: Dreierketten [Si3O9] 6-

Classification by Hölzel

9.DM.320

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
M: ~[Si3O9]6--...3-Chain, ~[Si6O15]6-
3: Tobermorite-Group

Hey's Chemical Index of Minerals

14.05.24

14: Silicates not Containing Aluminum
05: Silicates of Ca

Dana 8th edition

72.03.02.02

72: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
03: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
02: Tobermorite group (5- & 8-membered rings)

IMA status

anerkannt, Klinotobermorit ist der original Klinotobermorit anerkannt als 2m Polytyp

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Tobermorite supergroup

Optical Properties

Color

frablos, weiß

Lustre

Glasglanz

max. Birefringence

0.010
Birefringence chart\! Clinotobermorite title=Birefringence chart Clinotobermorite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.575

RI value β

1.580

RI value γ / ε

1.585

Ri mean

1.580

2V angle

Biaxial (-) 90°

Crystallography

Crystal System

monoklin

Class (H-M)

m, 2/m

Space Group number

9, 15

Space Group

Cc

Cell parameters a (Å)

11.331

Cell parameters b (Å)

7.353

Cell parameters c (Å)

22.67

Cell parameters a/b or c/a

1.541

Cell parameters c/b

3.083

Cell parameters α

90°

Cell parameters β

96.58

Cell parameters γ

90°

Z

4

Volumne (ų)

1876.351

X-Ray Powder Diffraction

11.25(100),
3.745(40),
3.304(50),
3.068(40),
3.034(60),
3.012(40),
2.811(40),
2.794(60)
XRD chart Clinotobermorite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.5

VHN (Hardness Vickers)

213 (25g)

Density (g/cm³)

2.58 (gemessen) 2.69 (berechnet)

2.587 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Japan/Honshu/Chugoku, Region/Okayama, Präfektur/Takahashi/Bitchu (Bicchu)/Fuka Mine

Preface

Author (Name, Year)

Henmi & Kusachi, 1992

References

Mineralogical Magazine 56 (1992), 353-358.

American Mineralogist 77 (1992), 451.

American Mineralogist 78 (1993), 672.

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

Zeitschrift für Kristallographie 212 (1997), 864-873.

European Journal of Mineralogy 12 (2000), 411.

Biagioni, C., Merlino, S., Bonaccorsi, E. - The tobermorite supergroup: a new nomenclature. Mineralogical Magazine, 79 (2015), 485-495. [Formel]

IMA group assignments

 
Tobermorite supergroup
 
 
 

 
 
Clinotobermorite
Ca5Si6O17·5H2O
monoklin
Cc

 
 
Plombièrite
Ca5Si6O16(OH)2·7H2O
monoklin
Cc

 
 
Riversideite ?
Ca5Si6O16(OH)2·2H2O
orthorhombisch
 

 
 
Tobermorite group
 
 
 

 
 
 
Kenotobermorite
Ca4Si6O15(OH)2·5H2O
 
 

 
 
 
Paratobermorite
Ca4(Al0.5Si0.5)2Si4O16 (OH)·2H2O·(Ca·3H2O)
monoklin
C1121/m

 
 
 
Tobermorite
Ca5Si6O17·5H2O
orthorhombisch
C2221

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Actuality: 15. Mar 2023 - 13:10:29

Other languages

English

Clinotobermorite

German

Klinotobermorit

Russian

Клинотоберморит

Alternative Name

German

Clinotobermorit

Spanish

Clinotobermorita

CNMNC (IMA)-Number

IMA 1990-005

CNMNC symbol

Symbol

Ctbm

Locations with GPS information