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Sclarite

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Formula:
(Zn,Mg,Mn
2+
 
)
 
4
Zn
 
3
(CO
 
3
)
 
2
(OH)
 
10
System:MonoclinicColour:Colourless, light gray ...
Hardness:3 - 4
Name:Named in 1989 by Joel D. Grice and Pete J. Dunn in honor of Dr. Charles B. Sclar (March 16, 1925 Newark, New Jersey, USA - January 13, 2001 Bethlehem, Northampton County, Pennsylvania, USA), Professor of Geology, Lehigh University, Bethlehem, Pennsylvania, U.S.A. Dr. Sclar was a specialist in high pressure metamorphic pertology, was a chief scientist to research the lunar petrology specimens collected on Apollo missions, and was a researcher of the Franklin - Ogdensburg ore deposits.
Isostructural with:Loseyite
This page provides mineralogical data about Sclarite.

Classification of Sclarite

IMA status:Approved 1988
Strunz 8th edition ID:5/C.01-130
Nickel-Strunz 10th (pending) edition ID:5.BA.30

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
A : With Cu, Co, Ni, Zn, Mg, Mn
Dana 8th edition ID:16a.5.3.2

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
5 : Miscellaneous
Hey's CIM Ref.:11.6.9

11 : Carbonates
6 : Carbonates of Zn and Cd
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Type Occurrence of Sclarite

Type Locality:Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
General Appearance of Type Material:Tiny slender bladed crystals or spherules with terminations creating a rough surface.
Year of Discovery:1988
Geological Setting of type material:Etched veinlets in calcite - willemite - franklinite ore.
Associated Minerals at type locality:
ZinciteWillemiteRhodochrositeLeucophoeniciteGageite
Chlorophoenicite

Physical Properties of Sclarite

Lustre:Resinous, Waxy, Greasy
Diaphaneity (Transparency):Translucent
Colour:Colourless, light gray in aggregates
Streak:White
Hardness (Mohs):3 - 4
Tenacity:Brittle
Cleavage:None Observed
Density (measured):3.51 g/cm3
Density (calculated):3.55 g/cm3

Crystallography of Sclarite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
Cell Parameters:a = 16.110Å, b = 5.432Å, c = 15.041Å
β = 95.49°
Ratio:a:b:c = 2.966 : 1 : 2.769
Unit Cell Volume:V 1,310.19 ų (Calculated from Unit Cell)
Z:4
Morphology:Flattened on {001}, elongated to {010}; Form {100} is generally small.
Comment:A2/a
X-Ray Powder Diffraction:
d-spacingIntensity
7.50 (100)
5.23 (20)
4.82 (20)
3.75 (40)
3.63 (50)
3.53 (40)
2.62 (50)
2.50 (40)

Optical Data of Sclarite

Type:Biaxial (+)
RI values: nα = 1.648 nβ = 1.664 nγ = 1.702
2V:Measured: 63° to 67°, Calculated: 68°
Birefringence:0.054
Maximum Birefringence:δ = 0.054

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v strong
Optical Extinction:Y=b, X^c = 49°
Pleochroism:Non-pleochroic

Chemical Properties of Sclarite

Formula:
(Zn,Mg,Mn
2+
 
)
 
4
Zn
 
3
(CO
 
3
)
 
2
(OH)
 
10
Essential elements:C, H, O, Zn
All elements listed in formula:C, H, Mg, Mn, O, Zn

Relationship of Sclarite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.BA.05Azurite
Cu
 
3
(CO
 
3
)
 
2
(OH)
 
2
5.BA.10Georgeite
Cu
 
2
(CO
 
3
)(OH)
 
2
 · 6H
 
2
O
5.BA.10Glaukosphaerite
(Cu,Ni)
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Kolwezite
(Cu,Co)
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Malachite
Cu
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Mcguinnessite
(Mg,Cu)
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Nullaginite
Ni
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Pokrovskite
Mg
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Rosasite
(Cu,Zn)
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Zincrosasite
(Zn,Cu)
 
2
(CO
 
3
)(OH)
 
2
5.BA.10Chukanovite
Fe
2+
2
(CO
 
3
)(OH)
 
2
5.BA.15Aurichalcite
(Zn,Cu)
 
5
(CO
 
3
)
 
2
(OH)
 
6
5.BA.15Hydrozincite
Zn
 
5
(CO
 
3
)
 
2
(OH)
 
6
5.BA.20Holdawayite
Mn
 
6
(CO
 
3
)
 
2
(OH)
 
7
(Cl,OH)
5.BA.25Defernite
Ca
 
6
(CO
 
3
)
 
2-x
(SiO
 
4
)
 
x
(OH)
 
7
(Cl,OH)
 
1-2x
 (x=0.5)
5.BA.25UM1977-03-COSiO:CaClH
Ca
 
10
(SiO
 
4
)(CO
 
3
)
 
7
(Cl,OH)
 
2
5.BA.30Loseyite
(Zn,Mn
2+
 
)
 
7
(CO
 
3
)
 
2
(OH)
 
10
Related Minerals - Hey's Index Grouping:

- +
11.6.1Smithsonite
ZnCO
 
3
11.6.2Hydrozincite
Zn
 
5
(CO
 
3
)
 
2
(OH)
 
6
11.6.3Rosasite
(Cu,Zn)
 
2
(CO
 
3
)(OH)
 
2
11.6.4Zincrosasite
(Zn,Cu)
 
2
(CO
 
3
)(OH)
 
2
11.6.5Aurichalcite
(Zn,Cu)
 
5
(CO
 
3
)
 
2
(OH)
 
6
11.6.6Claraite
(Cu,Zn)
 
3
(CO
 
3
)(OH)
 
4
 · 4H
 
2
O
11.6.7Minrecordite
CaZn(CO
 
3
)
 
2
11.6.8Loseyite
(Zn,Mn
2+
 
)
 
7
(CO
 
3
)
 
2
(OH)
 
10
11.6.10Otavite
CdCO
 
3

Other Names for Sclarite

Synonyms:
IMA1988-026
Other Languages:
German:Sclarit
Russian:Склярит
Spanish:Sclarita

Other Information

IR Spectrum:Not fluorescent
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 Sclarite

Reference List:

- +
Grice, J. D. & Dunn, P. J. (1989): Sclarite, a new mineral from Franklin, New Jersey, with essential octahedrally and tetrahedrally coordinated zinc: Description and structure refinement. American Mineralogist: 74: 1355-1359.

Internet Links for Sclarite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Sclarite details from Handbook of Mineralogy (PDF)
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    • Localities for Sclarite

    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.
    Hide Locality List
    (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.
    Greece
     
    • Attikí Prefecture (Attica; Attika)
      • Lavrion District (Laurion; Laurium)
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
            • Kamariza Mines (Kamareza Mines)
    		Schnorrer, G. (2004): Mineralogische Notizen VIII. Der Aufschluss, 55 (6), 381-384.
    Poland
     
    • Małopolskie
      • Olkusz District
        • Bolesław
    		Coppola, V., Boni, M., Gilg, A., and Strzelska-Smakowska, B. (2009): Mineralium Deposita 44, 559-580.
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Dunn, P.J.: Min.Rec.:17:126-127 (1986); Dunn(1995):Pt4:624-625.
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