Stratlingite Mineral Data

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)

IMA Status:

Approved IMA 1976

Locality:

Link to MinDat.org Location Data.

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 ScalenohedralH-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),

Crystal Structure:

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Rinaldi R , Sacerdoti M , Passaglia E , European Journal of Mineralogy , 2 (1990) p.841-849, Stratlingite: crystal structure, chemistry, and a reexamination, of its polytype vertumnite

Physical Properties of Stratlingite

Color:

Colorless, Light green.

Density:

1.9

Diaphaniety:

Transparent

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

Optical Data:

Uniaxial (-), w=1.534.

Calculated Properties of Stratlingite

Electron Density:

r_electron=1.96 gm/cc
note: r_Stratlingite=1.90 gm/cc.

Fermion Index

Fermion Index = 0.00374
Boson Index = 0.99626

Photoelectric:

PE_Stratlingite= 3.07 barns/electron
U=PE_Stratlingite x r_electron= 6.01 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stratlingite is Not Radioactive

Stratlingite Classification

Dana Class:

77.2.5.1 (77)Tectosilicate Zeolite group

(77.2)related species

(77.2.5)Dana Group

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

Strunz Class:

VIII/H.39-30 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica minerals with tetrahedral-double layers and related structures

VIII/H.39 - Silhydrite - Vertumnite series

VIII/H.39-10 Silhydrite 3SiO2·(H2O) P??? Ortho

VIII/H.39-20 Magadiite NaSi7O13(OH)3·4(H2O) Unk Mono

VIII/H.39-30 Stratlingite Ca2Al[(OH)6AlSiO2-3(OH)4-3]·2,5(H2O) R 3m 3 2/m

VIII/H.39-40 Vertumnite Ca8Al4(Al4Si5)O12[(OH)36·10(H2O) P 2₁/a 2/m

Other Stratlingite Information

References:

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

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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: 77.2.5.1 Strunz No: VIII/H.39-30
Locality:

Notes: