Mineralogy Database

Panunzite Mineral Data

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General Panunzite Information

Help on Chemical  Formula: Chemical Formula: (K,Na)AlSiO4
Help on Composition: Composition: Molecular Weight = 154.14 gm
   Potassium  19.02 %  K    22.92 % K2O
   Sodium      3.73 %  Na    5.03 % Na2O
   Aluminum   17.51 %  Al   33.08 % Al2O3
   Silicon    18.22 %  Si   38.98 % SiO2
   Oxygen     41.52 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.75Na0.25AlSiO4
Help on Environment: Environment: Within cavities of pyroxene-rich ejecta blocks that are part of a recent volcanoclastic deposit.
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: From Monte Somma and Vesuvius, Campania, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Dr. Achille Panunzi, Professor of Chemistry, University of Naples, Naples, Italy.
Help on Name Pronunciation: Name Pronunciation: Panunzite + Pronunciation Say PANUNZITE
Help on Synonym: Synonym: ICSD 30951
  PDF 31-1081

Panunzite Image

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Comments: Translucent colorless panunzite crystals lining a small cavity in greenish volcanic matrix.
Location: Valle de Diablo, Somma-Vesuvius Complex, Campania, Italy (Type Locality for Panunzite). Scale: Crystal Size 1-1.5 mm.
© John Betts - Fine Minerals

Panunzite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.41695
Help on Cell Dimensions: Cell Dimensions: a = 20.513, c = 8.553, Z = 32; V = 3,116.79 Den(Calc)= 2.63
Help on Crystal System: Crystal System: Hexagonal - Pyramidal H-M Symbol (6) Space Group: P 63
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.071(1), 3.929(0.7), 2.558(0.4),

Physical Properties of Panunzite

Help on Color: Color: Colorless, White.
Help on Density: Density: 2.59
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Streak: Streak: white

Optical Properties of Panunzite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2044,KPDmeas= 0.2075,KC= 0.204
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Uniaxial (-), e=1.535, w=1.54, bire=0.0050.

Calculated Properties of Panunzite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.59 gm/cc
note: Specific Gravity of Panunzite =2.63 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0087314594
Boson Index = 0.9912685406
Help on Photoelectric: Photoelectric: PEPanunzite = 3.17 barns/electron
U=PEPanunzite x relectron= 8.23 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 270.67 (Gamma Ray American Petroleum Institute Units)
Concentration of Panunzite per GRapi unit = 0.37 (%)

Estimated Radioactivity from Panunzite - barely detectable


Panunzite Classification

Help on  Dana Class: Dana Class: (76)Tectosilicate Al-Si Framework
  (76.02)Feldspathoids and related species
  (76.02.01)Nepheline group Kalsilite KAlSiO4 P 31c 3m Nepheline (Na,K)AlSiO4 P 63 6 Trikalsilite (K,Na)AlSiO4 P 63 6 Panunzite (K,Na)AlSiO4 P 63 6 Kaliophilite KAlSiO4 P 6322 6 2 2 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3 Megakalsilite! KAlSiO4 P 63 6
Help on  Strunz Class: Strunz Class: 09.FA.05 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1
09.FA.05 Nepheline (Na,K)AlSiO4 P 63 6
09.FA.05 Kaliophilite KAlSiO4 P 6322 6 2 2
09.FA.05 Kalsilite KAlSiO4 P 31c 3m
09.FA.05 Panunzite (K,Na)AlSiO4 P 63 6
09.FA.05 Trikalsilite (K,Na)AlSiO4 P 63 6
09.FA.05 Megakalsilite! KAlSiO4 P 63 6
09.FA.05 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3

Other Panunzite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.73,p420-421,1988) OPTIC PROP.(Am.Min.,Vol.73,p420-421,1988)
Help on See Also: See Also: Links to other databases for Panunzite :
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: 09.FA.05





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