Mineralogy Database

Vertumnite Mineral Data

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General Vertumnite Information

Help on Chemical  Formula: Chemical Formula: Ca8Al4(Al4Si5)O12[(OH)36•10(H2O)
Help on Composition: Composition: Molecular Weight = 1,683.36 gm
   Strontium   0.52 %  Sr    0.62 % SrO
   Calcium    18.57 %  Ca   25.98 % CaO
   Aluminum   13.46 %  Al   25.44 % Al2O3
   Silicon     8.51 %  Si   18.20 % SiO2
   Hydrogen    3.34 %  H    29.81 % H2O
   Oxygen     55.60 %  O
             ______        ______ 
             100.00 %      100.05 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca7.8Sr0.1Al8.4Si5.1O12.6(OH)36.1•9.8(H2O)
Help on Environment: Environment: As a late-forming crystals inside a small cavity in phonolite.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Found in a quarry at Campomorto, Montalto di Castro, Lazio, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Vertumnus, the god worshipped by the ancient Etruscan people who inhabited the region where the mineral was found.
Help on Name Pronunciation: Name Pronunciation: Vertumnite + Pronunciation Say VERTUMNITE
Help on Synonym: Synonym: ICSD 100407
  PDF 29-291

Vertumnite Image

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Comments: Rosettes of colorless platy vertumnite crystals.
Location: Ettringer, Bellerberg Mt, Eifel mountains, Germany. Scale: See Image.
© Rruff Database

Vertumnite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9961:1:4.3565
Help on Cell Dimensions: Cell Dimensions: a = 5.744, b = 5.766, c = 25.12, Z = 1; beta = 119.72° V = 722.53 Den(Calc)= 3.87
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.187(1), 12.51(0.7), 6.275(0.65),

Physical Properties of Vertumnite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.15
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Vertumnite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.44 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1384,KPDmeas= 0.2491,KC= 0.2473
Ncalc = 1.53 - 1.96
Help on Optical Data: Optical Data: Biaxial (-), a=1.531, b=1.535, g=1.541, bire=0.0100, 2V(Calc)=80, 2V(Meas)=62.

Calculated Properties of Vertumnite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.21 gm/cc
note: Specific Gravity of Vertumnite =2.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0048606219
Boson Index = 0.9951393781
Help on Photoelectric: Photoelectric: PEVertumnite = 3.55 barns/electron
U=PEVertumnite x rElectron Density= 7.85 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vertumnite is Not Radioactive

Vertumnite Classification

Help on  Dana Class: Dana Class: (73)Phyllosilicate Condensed Tetrahedral Sheets
  (73.01)with double layers
  (73.01.06)Dana Group Vertumnite Ca8Al4(Al4Si5)O12[(OH)36•10(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.EG.25 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EG -Double nets with 6-membered and larger rings
09.EG.25 Stratlingite Ca2Al[(OH)6AlSiO2-3(OH)4-3]•2,5(H2O) R 3m 3 2/m
09.EG.25 Vertumnite Ca8Al4(Al4Si5)O12[(OH)36•10(H2O) P 21/a 2/m

Other Vertumnite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Vertumnite :
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.EG.25





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