Stratlingite Mineral Data

General Stratlingite Information

Chemical Formula:

Ca2Al[(OH)6AlSiO2-3(OH)4-3]•2,5(H2O)

Composition:

Molecular Weight = 409.31 gm

Calcium 19.58 % Ca 27.40 % CaO

Aluminum 13.18 % Al 24.91 % Al₂O₃

Silicon 6.86 % Si 14.68 % SiO₂

Hydrogen 3.69 % H 33.01 % H₂O

Oxygen 56.68 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Al₂(SiO₂)(OH)₁₀•2.5(H₂O)

Environment:

In a metamorphosed limestone xenolith in basalt (Bellerberg volcano, Germany); within metamorphosed clay xenoliths in phonolite (Montalto di Castro, Italy).

IMA Status:

Approved IMA 1976

Locality:

At the Bellerberg volcano, two km north of Mayen, Eifel district, Germany. In a quarry at Campomorto, Montalto di Castro, Lazio, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for W. Stratling, who synthesized the mineral.

Name Pronunciation:

Stratlingite + Pronunciation

Synonym:

Straetlingite

Stratlingite Image

Images:

Stratlingite

Comments: Transparent blue-tinted platy stratlingite crystal aggregate in vug.
Location: Bellerberg, Eifel, Rheinland-Pfalz, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stratlingite Crystallography

Axial Ratios:

a:c = 1:6.57396

Cell Dimensions:

a = 5.753, c = 37.82, Z = 3; V = 1,084.03 Den(Calc)= 1.88

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 4.2(1), 12.69(1), 2.874(0.7),

Physical Properties of Stratlingite

Cleavage:

{0001} Perfect

Color:

Colorless, Light green.

Density:

1.9

Diaphaneity:

Transparent

Habit:

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

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Stratlingite

Gladstone-Dale:

CI meas= -0.116 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.128 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.284,KPDmeas= 0.2811,KC= 0.2519
Ncalc = 1.47 - 1.48

Optical Data:

Uniaxial (-), w=1.534.

Calculated Properties of Stratlingite

Electron Density:

Bulk Density (Electron Density)=1.96 gm/cc
note: Specific Gravity of Stratlingite =1.90 gm/cc.

Fermion Index:

Fermion Index = 0.0037463255
Boson Index = 0.9962536745

Photoelectric:

PE_Stratlingite= 3.07 barns/electron
U=PE_Stratlingite x rElectron Density= 6.01 barns/cc.

Radioactivity:

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

Stratlingite Classification

Dana Class:

77.02.05.01 (77)Tectosilicate Zeolite group

(77.02)related species

(77.02.05)Dana Group

77.02.05.01 Stratlingite Ca2Al[(OH)6AlSiO2-3(OH)4-3]•2,5(H2O) R 3m 3 2/m

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 Stratlingite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Stratlingite :
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 Stratlingite Specimen Label here :

Stratlingite

Ca2Al[(OH)6AlSiO2-3(OH)4-3]•2,5(H2O)
Dana No: 77.02.05.01 Strunz No: 09.EG.25
Locality:

Notes:

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