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Gravegliaite Mineral Data

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General Gravegliaite Information

Help on Chemical  Formula: Chemical Formula: Mn++(SO3)•3(H2O)
Help on Composition: Composition: Molecular Weight = 233.00 gm
   Manganese  42.44 %  Mn   54.80 % MnO
   Hydrogen    2.60 %  H    23.20 % H2O
   Sulfur     13.76 %  S    27.50 % SO2
   Oxygen     41.20 %  O
             ______        ______ 
             100.00 %      105.49 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+1.8(SO3)•3(H2O)
Help on Environment: Environment: Fractures in metamorphosed manganiferous layers in radiolarian cherts in an ophiolite sequence.
Help on IMA Status: IMA Status: Approved IMA 1991
Help on Locality: Locality: Gambatesa mine, near Reppia, Val Graveglia, Liguria, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Gravegliaite + Pronunciation Say GRAVEGLIAITE
Help on Synonym: Synonym: ICSD 33945
  PDF 44-1445

Gravegliaite Image

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Comments: Pale brownish prismatic crystals of gravegliaite on matrix.
Location: Gambatesa Mine, Val Graveglia, Genova, Liguria, Italy. Scale: Picture Size 1 mm.
© Thomas Witzke

Gravegliaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7325:1:1.6961
Help on Cell Dimensions: Cell Dimensions: a = 9.763, b = 5.635, c = 9.558, Z = 4; V = 525.83 Den(Calc)= 2.94
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.83(1), 4.33(0.98), 2.704(0.51),

Physical Properties of Gravegliaite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Colorless.
Help on Density: Density: 2.39
Help on Diaphaneity: Diaphaneity: Transparent
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Gravegliaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.202 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2066,KPDmeas= 0.2541,KC= 0.2589
Ncalc = 1.62 - 1.76
Help on Optical Data: Optical Data: Biaxial (+), a=1.59, b=1.596, g=1.636, bire=0.0460, 2V(Calc)=44, 2V(Meas)=41-43.

Calculated Properties of Gravegliaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.36 gm/cc
note: Specific Gravity of Gravegliaite =2.39 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0012338293
Boson Index = 0.9987661707
Help on Photoelectric: Photoelectric: PEGravegliaite = 11.48 barns/electron
U=PEGravegliaite x rElectron Density= 27.09 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gravegliaite is Not Radioactive

Gravegliaite Classification

Help on  Dana Class: Dana Class: (34)Selenites - Tellurites - Sulfites
  (34.02)as A++ XO3 � x(H2O)
  (34.02.05)Dana Group Hannebachite 2CaSO3•(H2O) Pbna 2/m 2/m 2/m Gravegliaite Mn(SO3)•3(H2O) P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.JE.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JE -Sulfites
04.JE.05 Gravegliaite Mn(SO3)•3(H2O) P nma 2/m 2/m 2/m

Other Gravegliaite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,1990)
Help on See Also: See Also: Links to other databases for Gravegliaite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 04.JE.05





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