Zinalsite Mineral Data

General Zinalsite Information

Chemical Formula:

Zn2AlSi2O5(OH)4•2(H2O) (?)

Composition:

Molecular Weight = 397.99 gm

Aluminum 6.78 % Al 12.81 % Al₂O₃

Zinc 32.86 % Zn 40.90 % ZnO

Silicon 14.11 % Si 30.19 % SiO₂

Hydrogen 2.03 % H 18.11 % H₂O

Oxygen 44.22 % O

______ ______

100.00 % 102.01 % = TOTAL OXIDE

Empirical Formula:

Zn₂AlSi₂O₅(OH)₄•2(H₂O)

Environment:

Probably an alteration product formed during the near-surface oxidation of zinc deposits. Fraipontite (1927) has priority over Zinalsite (1998).

IMA Status:

Valid Species (Pre-IMA) 1956 (Dana # Added)

Locality:

Kazakhstan Link to MinDat.org Location Data.

Name Origin:

Named for the major chemical constituents, ZINc, ALuminum, and SIlicon.

Name Pronunciation:

Zinalsite + Pronunciation

Zinalsite Image

Images:

Zinalsite Fraipontite Smithsonite

Comments: Pearly white, sub-mm fraipontite (zinalsite) crystals associated with green smithsonite.
Location: Lavrion District Mines, Lavrion District, AttikÃ (Attica; Attika) Prefecture, Greece. Scale: Specimen Size 1.4 x 1.0 x 0.9 cm.
© Rob Lavinsky

Zinalsite Crystallography

Crystal System:

Monoclinic

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

By Intensity(I/I_o): 2.657(1), 2.446(0.8), 7.5633(0.8),

Physical Properties of Zinalsite

Color:

White, Rose, Reddish brown.

Density:

3.007

Hardness:

2.5-3 - Finger Nail-Calcite

Optical Properties of Zinalsite

Gladstone-Dale:

CI meas= 0.109 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1921,KC= 0.2155
Ncalc = 1.65

Optical Data:

Biaxial (-), a=1.567, g=1.588, bire=0.0210

Calculated Properties of Zinalsite

Electron Density:

Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Zinalsite =3.01 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Zinalsite= 16.67 barns/electron
U=PE_Zinalsite x rElectron Density= 49.61 barns/cc.

Radioactivity:

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

Zinalsite Classification

Dana Class:

71.01.04.05 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.01)with 1:1 layers

(71.01.04)Allophane group

71.01.04.01 Allophane Al2O3•(SiO2)1.3-2•((H2O))2.5-3 None

71.01.04.02 Hisingerite Fe2Si2O5(OH)4•2(H2O) Unk Mono

71.01.04.03 Imogolite Al2SiO3(OH)4 ? Mono

71.01.04.04 Neotocite (Mn,Fe)SiO3•(H2O)(?) None

71.01.04.05 Zinalsite! Zn2AlSi2O5(OH)4•2(H2O)(?) Mono

Strunz Class:

09.BX.00 09 - SILICATES (Germanates)

09.B - Unclassified Strunz Phyllosilicates

09.BX -Allophane group

09.BX.00 Spodiophyllite? (Na,K)4(Mg,Fe)3(Fe,Al)2(Si8O24) Mono

09.BX.00 Pimelite? Ni3Si4O10(OH)2•4(H2O) Unk. Hex

09.BX.00 Zinalsite Zn2AlSi2O5(OH)4•2(H2O)(?) Mono

09.BX.00 Voloshinite Rb(LiAl1.5[]0.5)(Al0.5Si3.5)O10F2 C 2/c 2/m

09.BX.00 Shlykovite KCa[Si4O9(OH)]•3H2O P 2₁/c 2/m

09.BX.00 Orlovite KLi2TiSi4O11F C 2 2

09.BX.00 IMA2009-011 Ba3Na(Fe,Mn)8Ti4(Si2O7)4O4(OH,F)7 C1 1

Other Zinalsite Information

References:

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

See Also:

Links to other databases for Zinalsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - Franklin Minerals(Dunn)
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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

Zinalsite

Zn2AlSi2O5(OH)4•2(H2O) (?)
Dana No: 71.01.04.05 Strunz No: 09.BX.00
Locality:

Notes: