Clinotobermorite Mineral Data

Clinotobermorite Mineral Data

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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:

MonoclinicSpace 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),

Crystal Structure:

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Merlino S , Bonaccorsi E , Armbruster T , American Mineralogist , 84 (1999) p.1613-1621, Tobermorites: Their real structure and order-disorder (OD) character

View Additional jPOWD Structure files for Clinotobermorite
[1] [2] [3]

Physical Properties of Clinotobermorite

Cleavage:

[001] Perfect, [100] Poor

Color:

Colorless, White.

Density:

2.58

Diaphaniety:

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

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:

r_electron=2.62 gm/cc
note: r_{Clinotobermorite}=2.58 gm/cc.

Fermion Index

Fermion Index = 0.01107
Boson Index = 0.98893

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Clinotobermorite is Not Radioactive

Clinotobermorite Classification

Dana Class:

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

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

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

72.3.2.1 Tobermorite Ca5Si6O16(OH)2·4(H2O) C 222₁ 2 2 2

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

72.3.2.3 Plombierite Ca5H2Si6O18·6(H2O)(?) C 222₁ 2 2 2

72.3.2.4 Riversideite Ca5Si6O16(OH)2·2(H2O) B2212 2 2 2

72.3.2.5 Okenite Ca3[Si6O15]·6(H2O) P1 or P1 Tri

72.3.2.6 Tacharanite Ca12Al2Si18O33(OH)36 A centered Mono

72.3.2.7 Nekoite Ca3Si6O15·7(H2O) P1 1

72.3.2.8 Oyelite Ca10B2Si8O29·12(H2O) B**** Ortho

Strunz Class:

VIII/F.19-25 VIII - Silicates

VIII/F - Inosilicates (chain and band) Triplet chains [Si3O9]6-

VIII/F.19 - Riversideite - Plombierite series

VIII/F.19-10 Riversideite Ca5Si6O16(OH)2·2(H2O) B2212 2 2 2

VIII/F.19-20 Tobermorite Ca5Si6O16(OH)2·4(H2O) C 222₁ 2 2 2

VIII/F.19-25 Clinotobermorite Ca5Si6(O,OH)18·5(H2O) Cc,C 2/c Mono

VIII/F.19-30 Plombierite Ca5H2Si6O18·6(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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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

Clinotobermorite

Ca5Si6(O,OH)18·5(H2O)
Dana No: 72.3.2.2 Strunz No: VIII/F.19-25
Locality:

Notes: