Mineralogy Database

Plombierite Mineral Data

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General Plombierite Information

Help on Chemical  Formula: Chemical Formula: Ca5H2Si6O18•6H2O
Help on Composition: Composition: Molecular Weight = 767.00 gm
   Calcium   26.13 %  Ca   36.56 % CaO
   Silicon   21.97 %  Si   47.00 % SiO2
   Hydrogen   1.84 %  H    16.44 % H2O
   Oxygen    50.06 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca5H2Si6O18•6(H2O)
Help on Environment: Environment: Deposited in thermal waters on brick and mortor of an old Roman aqueduct at Ballycraigy, Larne, County Antrim, Northern Ireland.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1858
Help on Locality: Locality: Plombiees, Vosges, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality. Redefined in 1954.
Help on Name Pronunciation: Name Pronunciation: Plombierite + Pronunciation Say PLOMBIERITE
Help on Synonym: Synonym: Tobermorite-14Ang

Plombierite Image

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Comments: Whitish chalky massive, somewhat fibrous plombierite, in vesuvianite.
Location: Crestmore Quarry, Riverside County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Plombierite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.907:1:3.7692
Help on Cell Dimensions: Cell Dimensions: a = 6.735, b = 7.425, c = 27.987, Z = 2; beta = 123.25° V = 1,170.43 Den(Calc)= 2.18
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: B11b
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.83(1), 2.81(1), 3.09(1),

Physical Properties of Plombierite

Help on Color: Color: White.
Help on Density: Density: 2.018
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Amorphous - No crystalline form or imitative shape.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Luminescence: Luminescence: Phosphorescent fluorescent, Short UV=yellow cream-white, Long UV=yellow cream-white.
Help on Streak: Streak: white

Optical Properties of Plombierite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.183 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.095 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2523,KPDmeas= 0.2725,KC= 0.2304
Ncalc = 1.47 - 1.5
Help on Optical Data: Optical Data: Biaxial (?), b=1.55
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.

Calculated Properties of Plombierite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.22 gm/cc
note: Specific Gravity of Plombierite =2.18 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEPlombierite = 4.03 barns/electron
U=PEPlombierite x rElectron Density= 8.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Plombierite is Not Radioactive

Plombierite Classification

Help on  Dana Class: Dana Class: (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) Tobermorite Ca5Si6O16(OH)2•4(H2O) C 2221 2 2 2 Clinotobermorite Ca5Si6(O,OH)18•5(H2O) Cc,C 2/c Mono Plombierite Ca5H2Si6O18•6H2O B11b 2 Riversideite Ca5Si6O16(OH)2•2(H2O) B2212 2 2 2 Okenite Ca3[Si6O15]•6(H2O) P1 or P1 Tri Tacharanite Ca12Al2Si18O33(OH)36 A centered Mono Nekoite Ca3Si6O15•7(H2O) P1 1 Oyelite Ca10B2Si8O29•12(H2O) B**** Ortho
Help on  Strunz Class: Strunz Class: 09.DG.008. 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DG -Inosilicates with 3-periodic single and multiple chains
09.DG.008. Plombierite Ca5H2Si6O18•6H2O B11b 2

Other Plombierite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(AmMin, v90, p1951) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Plombierite :
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

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Dana No: Strunz No: 09.DG.008.





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