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Sclarite

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Formula:
(Zn,Mg,Mn2+)4Zn3(CO3)2(OH)10
Colour:
Colourless, light gray in aggregates
Lustre:
Resinous, Waxy, Greasy
Hardness:
3 - 4
Specific Gravity:
3.51
Crystal System:
Monoclinic
Name:
Named in 1989 by Joel Denison Grice and Pete J. Dunn in honor of Dr. Charles Bertram 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:
Sclarite occurs in small (<1mm) colorless crystals in cloudy grayish white crystal clusters. At low magnification, the sclarite appears smoothly spherical, but the crystals in the clusters distinctly project out of the spherical grouping at varying lengths. Spherical clusters of gray white to pale pink calcite/rhodochrosite are often present as are creamy white spherical clusters of Mineral E (Dunn, 1986). Sclarite has been observed only in the distinctive and essential association with fibrous lilac to purple gageite crystals.


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Classification of SclariteHide

Approved
Approval Year:
1988
5/C.01-130
5.BA.30

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

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
5 : Miscellaneous
11.6.9

11 : Carbonates
6 : Carbonates of Zn and Cd

Physical Properties of SclariteHide

Resinous, Waxy, Greasy
Transparency:
Transparent, Translucent
Colour:
Colourless, light gray in aggregates
Streak:
White
Hardness:
3 - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.51 g/cm3 (Measured)    3.55 g/cm3 (Calculated)

Optical Data of SclariteHide

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

Formula:
(Zn,Mg,Mn2+)4Zn3(CO3)2(OH)10
IMA Formula:
Zn7(CO3)2(OH)10

Crystallography of SclariteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 16.110 Å, b = 5.432 Å, c = 15.041 Å
β = 95.49°
Ratio:
a:b:c = 2.966 : 1 : 2.769
Unit Cell 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 DiffractionHide

Powder Diffraction Data:
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)

Type Occurrence of SclariteHide

General Appearance of Type Material:
Tiny slender bladed crystals or spherules with terminations creating a rough surface.
Geological Setting of Type Material:
Etched veinlets in willemite - franklinite ore without calcite.
Associated Minerals at Type Locality:

Synonyms of SclariteHide

Other Language Names for SclariteHide

German:Sclarit
Spanish:Sclarita

Related Minerals - Nickel-Strunz GroupingHide

5.BA.05AzuriteCu3(CO3)2(OH)2Mon. 2/m : P21/b
5.BA.10GeorgeiteCu2(CO3)(OH)2 · 6H2OAmor.
5.BA.10Glaukosphaerite(Cu,Ni)2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Kolwezite(Cu,Co)2(CO3)(OH)2Tric.
5.BA.10MalachiteCu2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Mcguinnessite(Mg,Cu)2(CO3)(OH)2
5.BA.10NullaginiteNi2(CO3)(OH)2Mon.
5.BA.10PokrovskiteMg2(CO3)(OH)2Mon.
5.BA.10Rosasite(Cu,Zn)2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Zincrosasite(Zn,Cu)2(CO3)(OH)2Mon.
5.BA.10ChukanoviteFe2+2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.15Aurichalcite(Zn,Cu)5(CO3)2(OH)6Mon. 2/m : P21/m
5.BA.15HydrozinciteZn5(CO3)2(OH)6Mon. 2/m : B2/m
5.BA.20HoldawayiteMn6(CO3)2(OH)7(Cl,OH)Mon. 2/m : B2/m
5.BA.25DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x<0.5)Orth. mmm (2/m 2/m 2/m) : Pnma
5.BA.25UM1977-03-COSiO:CaClHCa10-11(CO3)7(SiO4)Cl1-2(OH)1-2Mon.
5.BA.30Loseyite(Mn2+,Zn,Mg)4Zn3(CO3)2(OH)10Mon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

16a.5.3.1Loseyite(Mn2+,Zn,Mg)4Zn3(CO3)2(OH)10Mon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.6.1SmithsoniteZnCO3Trig. 3m (3 2/m) : R3c
11.6.2HydrozinciteZn5(CO3)2(OH)6Mon. 2/m : B2/m
11.6.3Rosasite(Cu,Zn)2(CO3)(OH)2Mon. 2/m : P21/b
11.6.4Zincrosasite(Zn,Cu)2(CO3)(OH)2Mon.
11.6.5Aurichalcite(Zn,Cu)5(CO3)2(OH)6Mon. 2/m : P21/m
11.6.6Claraite(Cu,Zn)15(CO3)4(AsO4)2(SO4)(OH)14·7H2OTric.
11.6.7MinrecorditeCaZn(CO3)2Trig. 3 : R3
11.6.8Loseyite(Mn2+,Zn,Mg)4Zn3(CO3)2(OH)10Mon. 2/m
11.6.10OtaviteCdCO3Trig. 3m (3 2/m)

Fluorescence of SclariteHide

Not fluorescent in UV

Other InformationHide

IR Spectrum:
Not fluorescent
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for SclariteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dunn, Pete J. (1986) A New Zinc Magnesium Carbonate and Data for other Unnamed Species from Franklin and Sterling Hill, New Jersey, Mineralogical Record, v. 17, p. 126-127.
Grice, J. D. and 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 SclariteHide

Localities for SclariteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
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 (TL)
 
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Dunn, P.J.: Min.Rec.:17:126-127 (1986); Dunn(1995):Pt4:624-625.
Mineral and/or Locality  
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