Aliettite Mineral Data

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General Aliettite Information

Chemical Formula:

[Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe++)2-3(Si,Al)4O10(OH)2•n(H2O)

Composition:

Molecular Weight = 823.18 gm

Sodium 0.56 % Na 0.75 % Na₂O

Calcium 0.49 % Ca 0.68 % CaO

Magnesium 10.33 % Mg 17.14 % MgO

Aluminum 13.11 % Al 24.77 % Al₂O₃

Iron 4.75 % Fe 6.11 % FeO

Silicon 17.06 % Si 36.50 % SiO₂

Hydrogen 1.22 % H 10.94 % H₂O

Oxygen 52.48 % O

______ ______

100.00 % 96.89 % = TOTAL OXIDE

Empirical Formula:

Mg₃Si₄O₁₀(OH)₂Ca_0.1Na_0.2AlFe²⁺_0.7Mg_0.5Al₃SiO₁₀(OH)₂·3(H₂O)

Environment:

Low temperature environments in ancient lake sediments. Also found in low-grade Mg-rich metamorphic rocks.

IMA Status:

Approved IMA 1969

Locality:

Italy, Monte Chiaro, Taro valley. Amargosa desert region, Death Valley, California, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Andrea Alietti (1923-), clay mineralogist.

Name Pronunciation:

Aliettite + Pronunciation

Aliettite Image

Images:

Aliettite

Comments: Tan to brownish pseudomorph of aliettite after wollastonite.
Location: Ingichka, Uzbekistan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aliettite Crystallography

Axial Ratios:

a:b = 1:4.71625

Cell Dimensions:

a = 5.216, b = 24.6, Z = 1; V = 669.28 Den(Calc)= 2.04

Crystal System:

MonoclinicSpace Group: Unk

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

By Intensity(I/I_o): 12(1), 1.52(0.9), 2.62(0.9),1.314(0.7), 3.5(0.6), 4.54(0.6), 1.725(0.4), 24(0.2),

Physical Properties of Aliettite

Cleavage:

{???} Perfect

Color:

White, Dark green, Buff.

Diaphaneity:

Translucent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

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

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Aliettite

Gladstone-Dale:

CI calc= -0.292 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2752,KC= 0.213
Ncalc = 1.43

Optical Data:

Uniaxial (?), a=1.556, b=1.567, bire=0.0110.

Calculated Properties of Aliettite

Electron Density:

Bulk Density (Electron Density)=2.04 gm/cc
note: Specific Gravity of Aliettite =2.04 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Aliettite= 2.75 barns/electron
U=PE_Aliettite x rElectron Density= 5.63 barns/cc.

Radioactivity:

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

Aliettite Classification

Dana Class:

71.04.02.08 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.04)interlayered 1:1, 2:1, and octahedra

(71.04.02)Interstratified Chlorite-Smectite group

71.04.02.01 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

71.04.02.02 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono

71.04.02.03 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m

71.04.02.04 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O) Unk Ortho

71.04.02.05 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10•n(H2O) Unk Ortho

71.04.02.06 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono

71.04.02.07 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4•2(H2O) Unk Mono

71.04.02.08 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2•n(H2O) Unk Mono

71.04.02.09 Glagolevite! NaMg6[Si3AlO10](OH,O)8•H2O C1 1

Strunz Class:

09.EC.60 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.60 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2•n(H2O) Unk Mono

09.EC.60 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

09.EC.60 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10•n(H2O) Unk Ortho

09.EC.60 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono

09.EC.60 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono

09.EC.60 Illite* (K,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)] C 2/m 2/m

09.EC.60 Hydrobiotite [K(Mg,Fe)3(Al,Fe)Si3O10(OH,F)2]•[(Mg,Fe,Al)3(Si,Al)4O10(OH)2•4(H2O)] C 2/m 2/m

09.EC.60 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono

09.EC.60 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4•2(H2O) Unk Mono

09.EC.60 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m

09.EC.60 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O) Unk Ortho

09.EC.60 Brinrobertsite! (Na,K,Ca)x(Al,Fe,Mg)4(Si,Al)8O20(OH)4•3.54(H2O)[x=0.35,n=3.54] pseudo 2/m 2/m

Other Aliettite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Aliettite :
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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Ask about Aliettite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Aliettite Specimen Label here :

Aliettite

[Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe++)2-3(Si,Al)4O10(OH)2•n(H2O)
Dana No: 71.04.02.08 Strunz No: 09.EC.60
Locality:

Notes: