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Clinotobermorite

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Formula:
[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
System:
Monoclinic
Hardness:
Name:
Redefined in by IMA in 2014, according to new nomenclature for the Tobermorite Group.
Structurally closely related to Tobermorite.

Classification of Clinotobermorite

Redefined Approved 2014
9.DG.10

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
72.3.2.2

72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
3 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
14.5.24

14 : Silicates not Containing Aluminum
5 : Silicates of Ca
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First Recorded Occurrence of Clinotobermorite

Year of Discovery:
1989

Physical Properties of Clinotobermorite

Hardness (Mohs):

Crystallography of Clinotobermorite

Crystal System:
Monoclinic
Cell Parameters:
a = 11.33Å, b = 7.35Å, c = 22.67Å
β = 96.59°
Ratio:
a:b:c = 1.541 : 1 : 3.084
Unit Cell Volume:
V 1,875.38 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
d-spacingIntensity
11.25 (100)
3.304 (51)
3.068 (45)
3.034 (60)
3.012 (37)
2.811 (41)
2.794 (60)

Optical Data of Clinotobermorite

Type:
Biaxial (+/-)
RI values:
nα = 1.575 nβ = 1.580 nγ = 1.585
2V:
Measured: 89° , Calculated: 88°
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
very weak

Chemical Properties of Clinotobermorite

Formula:
[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
Essential elements:
All elements listed in formula:
Common Impurities:
Ti,B,Al,Fe,Mn,Mg,Na,K,F

Relationship of Clinotobermorite to other Species

Other Members of Group:
Kenotobermorite[Ca4Si6O15(OH)2·2H2O]·3H2O
Plombièrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)
RiversideiteCa5(HSi3O9)2 · 2H2O
Tobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
9.DG.05BustamiteCaMn2+(Si2O6)
9.DG.05FerrobustamiteCaFe2+(Si2O6)
9.DG.05PectoliteNaCa2(HSi3O9)
9.DG.05SéranditeNa(Mn2+,Ca)2(HSi3O9)
9.DG.05WollastoniteCaSiO3
9.DG.05Wollastonite-1ACaSiO3
9.DG.07CascanditeCa(Sc,Fe3+)(HSi3O9)
9.DG.08Plombièrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)
9.DG.10RiversideiteCa5(HSi3O9)2 · 2H2O
9.DG.10Tobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
9.DG.15FoshagiteCa4(Si3O9)(OH)2
9.DG.20JenniteCa9(Si3O9)2(OH)8 · 8H2O
9.DG.25ParaumbiteK3Zr2H(Si3O9)2 · nH2O
9.DG.25UmbiteK2(Zr,Ti)Si3O9 · H2O
9.DG.30SørenseniteNa4SnBe2Si6O16(OH)4
9.DG.35XonotliteCa6(Si6O17)(OH)2
9.DG.40HillebranditeCa2(SiO3)(OH)2
9.DG.45ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2O
9.DG.45ChivruaiiteCa4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2O
9.DG.50Haineaultite(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2O
9.DG.55EpididymiteNa2Be2Si6O15 · H2O
9.DG.60EudidymiteNa2Be2Si6O15 · H2O
9.DG.65ElpiditeNa2ZrSi6O15 · 3H2O
9.DG.70Fenaksite(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)
9.DG.70LitidioniteCuNaKSi4O10
9.DG.70ManaksiteKNaMnSi4O10
9.DG.75TinaksiteK2Na(Ca,Mn2+)2Ti[O|Si7O18(OH)]
9.DG.75TokkoiteK2Ca4Si7O17(O,OH,F)4
9.DG.75SenkevichiteCsKNaCa2Ti[O|Si7O18(OH)]
9.DG.80CanasiteK2Na4Ca5(Si12O30(OH,F)4
9.DG.80FluorcanasiteK3Na3Ca5Si12O30F4 · H2O
9.DG.85MiseriteK1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2O
9.DG.90FrankameniteK3Na3Ca5(Si12O30)(F,OH)4 · H2O
9.DG.92Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O
9.DG.95Yuksporite(K,Ba)NaCa2(Si,Ti)4O11(F,OH) · H2O
9.DG.97Eveslogite(Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14
14.5.1WollastoniteCaSiO3
14.5.2Wollastonite-7T
14.5.3Wollastonite-2MCaSiO3
14.5.4RankiniteCa3Si2O7
14.5.5KilchoaniteCa6(SiO4)(Si3O10)
14.5.6LarniteCa2SiO4
14.5.7BredigiteCa7Mg(SiO4)4
14.5.8HatruriteCa3(SiO4)O
14.5.9RosenhahniteHCa3[Si3O9(OH)]
14.5.10DellaiteCa6(Si2O7)(SiO4)(OH)2
14.5.11AfwilliteCa3(HSiO4)2 · 2H2O
14.5.12XonotliteCa6(Si6O17)(OH)2
14.5.13FoshagiteCa4(Si3O9)(OH)2
14.5.14HillebranditeCa2(SiO3)(OH)2
14.5.15JaffeiteCa6(Si2O7)(OH)6
14.5.16SuoluniteCa2(H2Si2O7) · H2O
14.5.17KillalaiteCa6.4(H0.6Si2O7)2(OH)2
14.5.18OkeniteCaSi2O5 · 2H2O
14.5.19RiversideiteCa5(HSi3O9)2 · 2H2O
14.5.20TrabzoniteCa4(Si3O10) · 2H2O
14.5.21GyroliteNaCa16Si23AlO60(OH)8 · 14H2O
14.5.22FoshallasiteCa3[Si2O7] · 3H2O(?)
14.5.23Tobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
14.5.25NekoiteCa3Si6O15·7H2O
14.5.26Plombièrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)
14.5.27JenniteCa9(Si3O9)2(OH)8 · 8H2O

Other Names for Clinotobermorite

Other Information

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

References for Clinotobermorite

Reference List:
New Minerals (1997), New Minerals 1990-1994.

Mineralogical Magazine: 56: 353-358.

Hoffmann, C. & Armbruster, T. (1997): Clinotobermorite, Ca5[Si3O8(OH)]2.4H2O - Ca5[Si6O17].5H2O, a natural C-S-H(I) type cement mineral. Determination of the substructure. Zeitschrift für Kristallographie 212, 864-873.

Merlino, S., Bonaccorsi, E., and Armbruster, T. (2001): The real structure of tobermorite-11Å: normal and anomalous forms, OD character and polytypic modifications. European Journal of Mineralogy 13(3), 577-590.

Internet Links for Clinotobermorite

Localities for Clinotobermorite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Italy
 
  • Veneto
    • Vicenza Province
      • Cornedo Vicentino
        • Spagnago
Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183; Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011): Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni. Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
      • Gambellara
        • S.Marco hill
Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
      • San Vito di Leguzzano-Schio
Boscardin M., Daleffe A., Rocchetti I., Zordan A. “I minerali nel Vicentino”, Museo “G. Zannato”, Montecchio Maggiore (Vicenza), 2011.
Japan
 
  • Honshu Island
    • Chugoku Region
      • Okayama Prefecture
        • Takahashi City
          • Bicchu-cho (Bitchu-cho)
            • Fuka
Henmi, C., & Kusachi, I. (1992). Clinotobermorite, Ca5Si6(O,OH)18.5H2O, a new mineral from Fuka, Okayama Prefecture, Japan. Mineralogical Magazine, 56, 353-358.
Mineral and/or Locality  
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