Clinotobermorite Mineral Data

General Clinotobermorite Information

Chemical Formula:

Ca5Si6(O,OH)18•5(H2O)

Composition:

Molecular Weight = 751.00 gm

Calcium 26.68 % Ca 37.34 % CaO

Silicon 22.44 % Si 48.00 % SiO₂

Hydrogen 1.88 % H 16.79 % H₂O

Oxygen 49.00 % O

______ ______

100.00 % 102.13 % = TOTAL OXIDE

Empirical Formula:

Ca₅Si₆O₁₄(OH)₄•5(H₂O)

Environment:

A vein-forming mineral in gehlenite-spurrite skarns. Low-temperature polymorph of tobermorite.

IMA Status:

Approved IMA 1989

Locality:

Fuka, Bitchucho, Okayama Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named as the monoclinic polymorph of tobermorite.

Synonym:

ICSD 403090

IMA1990-005

PDF 45-1479

Clinotobermorite Image

Images:

Clinotobermorite

Comments: Opaque white pure massive clinotobermorite.
Location: Bazhenovskoe, Asbest, Sverdlovsk District, Middle Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Clinotobermorite Crystallography

Axial Ratios:

a:b:c =1.541:1:3.083

Cell Dimensions:

a = 11.331, b = 7.353, c = 22.67, Z = 4; beta = 96.59° V = 1,876.31 Den(Calc)= 2.66

Crystal System:

Monoclinic Space Group: Cc,C 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 11.25(1), 2.794(0.6), 3.034(0.6),

Physical Properties of Clinotobermorite

Cleavage:

{001} Perfect, {100} Poor

Color:

Colorless, White.

Density:

2.58

Diaphaneity:

Transparent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Clinotobermorite

Gladstone-Dale:

CI meas= 0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.074 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.218,KPDmeas= 0.2248,KC= 0.2353
Ncalc = 1.61 - 1.63

Optical Data:

Biaxial (+/-), a=1.575, b=1.58, g=1.585, bire=0.0100, 2V(Calc)=88, 2V(Meas)=89.8.

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Clinotobermorite

Electron Density:

Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Clinotobermorite =2.58 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Clinotobermorite}= 4.11 barns/electron
U=PE_{Clinotobermorite} x rElectron Density= 10.78 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Clinotobermorite is Not Radioactive

Clinotobermorite Classification

Dana Class:

72.03.02.02 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings

(72.03)with 3-, 4-, or 5-membered rings and 8-membered rings

(72.03.02)Tobermorite group (5- & 8-membered rings)

72.03.02.01 Tobermorite Ca5Si6O16(OH)2•4(H2O) C 222₁ 2 2 2

72.03.02.02 Clinotobermorite Ca5Si6(O,OH)18•5(H2O) Cc,C 2/c Mono

72.03.02.03 Plombierite Ca5H2Si6O18•6H2O B11b 2

72.03.02.04 Riversideite Ca5Si6O16(OH)2•2(H2O) B2212 2 2 2

72.03.02.05 Okenite Ca3[Si6O15]•6(H2O) P1 or P1 Tri

72.03.02.06 Tacharanite Ca12Al2Si18O33(OH)36 A centered Mono

72.03.02.07 Nekoite Ca3Si6O15•7(H2O) P1 1

72.03.02.08 Oyelite Ca10B2Si8O29•12(H2O) B**** Ortho

Strunz Class:

09.DG.10 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DG -Inosilicates with 3-periodic single and multiple chains

09.DG.10 Clinotobermorite Ca5Si6(O,OH)18•5(H2O) Cc,C 2/c Mono

09.DG.10 Riversideite Ca5Si6O16(OH)2•2(H2O) B2212 2 2 2

09.DG.10 Tobermorite Ca5Si6O16(OH)2•4(H2O) C 222₁ 2 2 2

Other Clinotobermorite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Clinotobermorite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Clinotobermorite Specimen Label here :

Clinotobermorite

Ca5Si6(O,OH)18•5(H2O)
Dana No: 72.03.02.02 Strunz No: 09.DG.10
Locality:

Notes:

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