Mineralogy Database

Palenzonaite Mineral Data

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General Palenzonaite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Na)3Mn++(V+++++,As+++++,Si)3O12
Help on Composition: Composition: Molecular Weight = 517.63 gm
   Sodium      4.44 %  Na    5.99 % Na2O
   Calcium    15.49 %  Ca   21.67 % CaO
   Manganese  10.61 %  Mn   13.70 % MnO
   Vanadium   17.71 %  V    31.62 % V2O5
   Silicon     1.63 %  Si    3.48 % SiO2
   Arsenic    13.03 %  As   19.98 % As2O5
   Oxygen     37.09 %  O
             ______        ______ 
             100.00 %       96.45 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2NaMn2+3(VO4)0.63(AsO4)0.33(SiO4)0.1
Help on Environment: Environment: Narrow veinlets cutting a manganese deposit hosted within radiolarian cherts.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Molinello manganese mine, near Chiavari, Val Graveglia, Liguria, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Andrea Palenzona, amateur mineralogist and discoverer of the mineral.
Help on Name Pronunciation: Name Pronunciation: Palenzonaite + Pronunciation Say PALENZONAITE
Help on Synonym: Synonym: ICSD 67441
  PDF 41-608

Palenzonaite Image

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Comments: Dark reddish-brown palenzonaite.
Location: Molinello Mine, Val Graveglia, Liguria, Italy. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Palenzonaite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 12.534, Z = 8; V = 1,969.11 Den(Calc)= 3.49
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.803(1), 2.558(0.6), 3.132(0.55),

Physical Properties of Palenzonaite

Help on Cleavage: Cleavage: None
Help on Color: Color: Wine red.
Help on Density: Density: 3.63
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luster: Luster: Adamantine
Help on Streak: Streak: brownish red

Optical Properties of Palenzonaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.151 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.197 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2765,KPDmeas= 0.2658,KC= 0.231
Ncalc = 1.81 - 1.84
Help on Optical Data: Optical Data: Isotropic, n=1.965.

Calculated Properties of Palenzonaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.47 gm/cc
note: Specific Gravity of Palenzonaite =3.63 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0015901077
Boson Index = 0.9984098923
Help on Photoelectric: Photoelectric: PEPalenzonaite = 17.10 barns/electron
U=PEPalenzonaite x rElectron Density= 59.32 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Palenzonaite is Not Radioactive

Palenzonaite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.02)(A+ B++)5 (XO4)3
  (38.02.01)Berzeliite Group Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 I a3d 4/m 3 2/m Manganberzeliite (Ca,Na)3(Mn,Mg)2(AsO4)3 I a3d 4/m 3 2/m Palenzonaite (Ca,Na)3Mn(V,As,Si)3O12 I a3d 4/m 3 2/m Schaferite! NaCa2Mg2(VO4)3 I a3d 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 08.AC.25 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
08.AC.25 Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 I a3d 4/m 3 2/m
08.AC.25 Palenzonaite (Ca,Na)3Mn(V,As,Si)3O12 I a3d 4/m 3 2/m
08.AC.25 Manganberzeliite (Ca,Na)3(Mn,Mg)2(AsO4)3 I a3d 4/m 3 2/m
08.AC.25 Schaferite! NaCa2Mg2(VO4)3 I a3d 4/m 3 2/m

Other Palenzonaite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.73,p930,1988) OPTIC PROP.(Am.Min.,Vol.73,p930,1988)
Help on See Also: See Also: Links to other databases for Palenzonaite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 08.AC.25





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