Sweetite Mineral Data

General Sweetite Information

Chemical Formula:

Zn(OH)2

Composition:

Molecular Weight = 99.40 gm

Zinc 65.78 % Zn 81.88 % ZnO

Hydrogen 2.03 % H 18.12 % H₂O

Oxygen 32.19 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn(OH)₂

Environment:

Oxidized vein in limestone.

IMA Status:

Approved IMA 1984

Locality:

Limestone quarry 200-300 m northwest of Milltown, near Ashover, Derbyshire, England. Link to MinDat.org Location Data.

Name Origin:

Named for Jessie May Sweet (1901-1979), Curator of the mineral collections of the British Museum (Natural History), London, England.

Name Pronunciation:

Sweetite

Sweetite Image

Images:

Sweetite

Comments: A white, pseudocubic crystal of sweetite.
Location: Milltown Quarry, Ashover, Derbyshire, England, UK. Scale: Picture size 1.4 mm.
© John Betts - Fine Minerals

Sweetite Crystallography

Axial Ratios:

a:c = 1:1.7441

Cell Dimensions:

a = 8.222, c = 14.34, Z = 20; V = 969.40 Den(Calc)= 3.41

Crystal System:

Tetragonal - TrapezohedralH-M Symbol (4 2 2) Space Group: P 4₁2₁2,P 4₃2₁2

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

By Intensity(I/I_o): 2.922(1), 3.572(0.6), 4.53(0.37),

Physical Properties of Sweetite

Color:

Colorless, White.

Density:

3.33

Diaphaneity:

Transparent to Translucent

Streak:

white

Optical Properties of Sweetite

Gladstone-Dale:

CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1852,KPDmeas= 0.1896,KC= 0.191
Ncalc = 1.64 - 1.65

Optical Data:

Uniaxial (-), e=1.628, w=1.635, bire=0.0070.

Calculated Properties of Sweetite

Electron Density:

Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Sweetite =3.33 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Sweetite= 32.62 barns/electron
U=PE_Sweetite x rElectron Density= 104.89 barns/cc.

Radioactivity:

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

Sweetite Classification

Dana Class:

06.02.09.01 (06)Hydroxides and Oxides Containing Hydroxyl

(06.02)where X++ (OH)2

(06.02.09)Dana Group

06.02.09.01 Sweetite Zn(OH)2 P 4₁2₁2,P 4₃2₁2 4 2 2

Strunz Class:

04.FA.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FA -Hydroxides with OH, without H2O; corner-sharing tetrahedra

04.FA.10 Ashoverite Zn(OH)2 I 4₁/amd 4/m 2/m 2/m

04.FA.10 Sweetite Zn(OH)2 P 4₁2₁2,P 4₃2₁2 4 2 2

04.FA.10 Wulfingite Zn(OH)2 P 2₁2₁2₁ 2 2 2

Other Sweetite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

Sweetite

Zn(OH)2
Dana No: 06.02.09.01 Strunz No: 04.FA.10
Locality:

Notes: