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Sweetite

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Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
© Steve Rust

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Formula:
Zn(OH)
 
2
System:TetragonalColour:White
Name:Named after Jessie May Sweet (1901-1979), Curator of Minerals, The British Museum.
This page provides mineralogical data about Sweetite.

Classification of Sweetite

IMA status:Approved 1983
Strunz 8th edition ID:4/F.03-60
Nickel-Strunz 10th (pending) edition ID:4.FA.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
A : Hydroxides with OH, without H2O; corner-sharing tetrahedra
Dana 8th edition ID:6.2.9.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
Hey's CIM Ref.:7.5.2

7 : Oxides and Hydroxides
5 : Oxides of Zn, Cd and Hg
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Type Occurrence of Sweetite

Type Locality:Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
Year of Discovery:1984

Physical Properties of Sweetite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:White
Density (measured):3.33 g/cm3
Density (calculated):3.41 g/cm3

Crystallography of Sweetite

Crystal System:Tetragonal
Cell Parameters:a = 8.22Å, c = 14.34Å
Ratio:a:c = 1 : 1.745
Unit Cell Volume:V 968.93 ų (Calculated from Unit Cell)
Morphology:Tetragonal bipyramids

Optical Data of Sweetite

Type:Uniaxial (-)
RI values: nω = 1.635 nε = 1.628
Maximum Birefringence:δ = 0.007

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Sweetite

Formula:
Zn(OH)
 
2
Essential elements:H, O, Zn
All elements listed in formula:H, O, Zn

Relationship of Sweetite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.FA.05aBehoite
Be(OH)
 
2
4.FA.05bClinobehoite
Be(OH)
 
2
4.FA.10Ashoverite
Zn(OH)
 
2
4.FA.10Wülfingite
Zn(OH)
 
2
Related Minerals - Hey's Index Grouping:

- +
7.5.1Zincite
(Zn,Mn
2+
 
,Fe
2+
 
)O
7.5.3Ashoverite
Zn(OH)
 
2
7.5.4Wülfingite
Zn(OH)
 
2
7.5.5Gahnite
ZnAl
 
2
O
 
4
7.5.6Hetaerolite
ZnMn
 
2
O
 
4
7.5.7Hydrohetaerolite
ZnMn
 
2
O
 
4
·H
 
2
O
7.5.8Chalcophanite
(Zn,Fe,Mn)Mn
 
3
O
 
7
·3H
 
2
O
7.5.9Woodruffite
Zn(Mn
4+
 
,Mn
3+
 
)
 
5
O
 
10
·3½H
 
2
O
7.5.10Franklinite
Zn
2+
 
Fe
3+
2
O
 
4
7.5.11Monteponite
CdO
7.5.12Montroydite
HgO

Other Names for Sweetite

Synonyms:
IMA1983-011
Other Languages:
German:Sweetit
Spanish:Sweetita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Sweetite

Reference List:Mineralogical Magazine (1984): 48: 267-269.

American Mineralogist (1985): 70: 438.

Internet Links for Sweetite

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    Localities for Sweetite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Lower Saxony
      • Harz Mts
        • Goslar
          • Astfeld
    		No reference listed
    UK
     
    • England
      • Derbyshire
        • Ashover
          • Milltown
    		[Min.Mag.(1984) 48, 267-269; Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.
    Mineral and/or Locality
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