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Mercallite

A valid IMA mineral species - grandfathered
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EditAdd SynonymEdit CIF structuresClear Cache
KHSO4
Colour:
Colourless, sky-blue; colourless in transmitted light
Lustre:
Vitreous
Specific Gravity:
2.31
Crystal System:
Orthorhombic
Name:
Named in 1935 by Guido Carobbi in honor of Giuseppe Mercalli (21 May 1850, Milan, Italy – 19 March 1914, Naples, Italy), volcanologist. At different times he was professor of geology at the University of Catania, professor at Naples University, and Director of the Vesuvius Observatory.
Type Locality:
ⓘMount Vesuvius, Metropolitan City of Naples, Campania, Italy
This page provides mineralogical data about Mercallite.


Unique Identifiers
IMA Formula:
KH(SO4)
Type description reference:
Carobbi G (1935) «Mercallite» nuovo minerale fra i prodotti dell'attivita fumarolica vesuviana del 1933. Rendiconti, Reale Accademia dei Lincei 21, 385-393

Classification of Mercallite

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
D : With only large cations
Dana 8th ed.:
28.1.1.1

28 : ANHYDROUS ACID AND NORMAL SULFATES
1 : Anhydrous Acid Sulfates
Hey's CIM Ref.:
25.1.5

25 : Sulphates
1 : Sulphates of the alkali metals and ammonium

Mineral Symbols
Transparency:
Transparent
Colour:
Colourless, sky-blue; colourless in transmitted light
Cleavage:
None Observed
Density:
2.31 g/cm3 (Measured)    2.32 g/cm3 (Calculated)

Optical Data of Mercallite
Surface Relief:
Moderate
Dispersion:
relatively strong

Chemistry of Mercallite

Crystallography of Mercallite
Place of Conservation of Type Material:
University of Florence, Florence, Italy, 1976/I.
Geological Setting of Type Material:
Active volcanic fumaroles.
Associated Minerals at Type Locality:
CarobbiiteHieratiteMisenite
Reference:
Carobbi G (1935) «Mercallite» nuovo minerale fra i prodotti dell'attivita fumarolica vesuviana del 1933. Rendiconti, Reale Accademia dei Lincei 21, 385-393

Other Language Names for Mercallite

Related Minerals -Strunz-mindat GroupingTrig. 3m :P31c7.AD.DobrovolskyiteNa4Ca(SO4)3Trig. 3 :R37.AD.CalciolangbeiniteK2Ca2(SO4)3Iso. 23 :P2137.AD.MurphyitePb(Te6+O4)Mon. 2/m :P21/b7.AD.CuprodobrovolskyiteNa4Cu(SO4)3Trig. 3 :R37.AD.KristjániteKNa2H(SO4)2Mon. 2/m7.AD.05Mascagnite(NH4)2SO4Orth.mmm(2/m2/m2/m) :Pnma7.AD.05ArcaniteK2SO4Orth.mmm(2/m2/m2/m)7.AD.15MiseniteK8H6(SO4)7Mon.7.AD.20Letovicite(NH4)3H(SO4)2Tric.7.AD.25ThénarditeNa2SO4Orth.mmm(2/m2/m2/m) :Fddd7.AD.25GlauberiteNa2Ca(SO4)2Mon. 2/m :B2/b7.AD.30MetathénarditeNa2SO4Hex. 6/mmm(6/m2/m2/m) :P63/mmc7.AD.30AnhydriteCaSO4Orth.mmm(2/m2/m2/m)7.AD.35BaryteBaSO4Orth.mmm(2/m2/m2/m) :Pnma7.AD.35CelestineSrSO4Orth.mmm(2/m2/m2/m) :Pnma7.AD.35OlsacheritePb2(Se6+O4)(SO4)Orth.7.AD.35AnglesitePbSO4Orth.mmm(2/m2/m2/m) :Pnma7.AD.40KalistrontiteK2Sr(SO4)2Trig.3m(32/m) :R3m7.AD.40PalmieriteK2Pb(SO4)2Trig.3m(32/m) :R3m7.AD.45IvsiteNa3H(SO4)2Mon. 2/m :P21/b7.AD.55MarkhininiteTlBi(SO4)2Tric.1 :P1

Radioactivityshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).

D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield

Other Information
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  • Raman and XRD data at RRUFF project
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    • References for MercalliteⓘNorth lngebright LakeShang (2000)
    Costa Rica
     
    Ulloa et al. (2018)
    Iceland
     
    Balić-Žunić et al. (2016)
    Italy (TL)
     
    Accad. Lincei. Rend. Cl. Sci. fis. mat. nat. Roma (1935)+2 other referencesRusso et al. (2004)
    Peru
     
    Tyc et al. (2022)
    Russia
     
    Zelenski et al. (2020)
    Quick NavTopAbout MercalliteUnique IdentifiersIMA ClassificationClassificationMineral SymbolsPhysical PropertiesOptical DataChemistryCrystallographyCrystal StructureX-Ray Powder DiffractionGeological EnvironmentType OccurrenceOther LanguagesStrunz-MindatRadioactivityOther InformationInternet LinksReferencesLocalitiesLocality List
     
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