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Panunzite

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Formula:
(K,Na)AlSiO4
Colour:
colourless
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.59
Crystal System:
Hexagonal
Name:
Named by Enrico Franco and Maurizio De Gennaro in 1988 in honor of Achille Panunzi, professor of chemistry, University of Naples. Dr. Panunzi discovered the blocks ejected from Mt. Somma that contained the mineral.
This page provides mineralogical data about Panunzite.


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Classification of PanunziteHide

Approved
Approval Year:
1978
9.FA.05

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
76.2.1.4

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
16.4.2

16 : Silicates Containing Aluminum and other Metals
4 : Aluminosilicates of Na and K

Physical Properties of PanunziteHide

Vitreous
Transparency:
Transparent
Colour:
colourless
Streak:
white
Hardness:
5½ on Mohs scale
Density:
2.59 g/cm3 (Measured)    2.62 g/cm3 (Calculated)

Optical Data of PanunziteHide

Type:
Uniaxial (-)
RI values:
nω = 1.540() nε = 1.535(1)
Birefringence:
0.005
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Not Visible

Chemical Properties of PanunziteHide

Formula:
(K,Na)AlSiO4
IMA Formula:
K3Na(AlSiO4)4
Common Impurities:
Fe,Mg,Ca,Sr,Ba,Rb,H2O

Crystallography of PanunziteHide

Crystal System:
Hexagonal
Class (H-M):
6 - Pyramidal
Space Group:
P63
Cell Parameters:
a = 20.513(8) Å, c = 8.553(3) Å
Ratio:
a:b:c =
Warning: Division by zero in /home/mindat/www/include.php on line 8706
INF :
Warning: Division by zero in /home/mindat/www/include.php on line 8719
INF
Unit Cell V:
3,116.79 ų (Calculated from Unit Cell)
Z:
32

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.277 (25)
3.929 (70)
3.071 (100)
2.914 (30)
2.558 (40)
2.380 (20)
2.268 (20)

Type Occurrence of PanunziteHide

General Appearance of Type Material:
hexagonal prisms up to 4 mm in length.
Geological Setting of Type Material:
in cavities in pyroxene-rich ejecta blocks in recent volcanoclastic deposits.

Synonyms of PanunziteHide

Other Language Names for PanunziteHide

German:Panunzit
Spanish:Panunzita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Diopside2 photos of Panunzite associated with Diopside on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.FA.05KaliophiliteKAlSiO4Hex.
9.FA.05KalsiliteKAlSiO4Hex. 6 2 2 : P63 2 2
9.FA.05Nepheline(Na,K)AlSiO4Hex. 6 : P63
9.FA.05Trikalsilite(K,Na)AlSiO4Hex.
9.FA.05Yoshiokaite(Ca,Na)[Al(Al,Si)O4]Trig. 3 : P3
9.FA.05MegakalsiliteKAlSiO4Hex.
9.FA.10MalinkoiteNaBSiO4Hex. 6 : P63
9.FA.15VirgiliteLiAlSi2O6Hex. 6 2 2 : P62 2 2
9.FA.25LisitsyniteKBSi2O6Orth. 2 2 2 : P2 2 2
9.FA.30AdulariaKAlSi3O8Mon.
9.FA.30Anorthoclase(Na,K)AlSi3O8Tric.
9.FA.30Buddingtonite(NH4)(AlSi3)O8Mon. 2 : P21
9.FA.30CelsianBa(Al2Si2O8)Mon. 2/m
9.FA.30Hyalophane(K,Ba)[Al(Si,Al)Si2O8]Mon.
9.FA.30MicroclineK(AlSi3O8)Tric. 1
9.FA.30OrthoclaseK(AlSi3O8)Mon. 2/m : B2/m
9.FA.30SanidineK(AlSi3O8)Mon. 2/m : B2/m
9.FA.30RubiclineRb(AlSi3O8)Tric.
9.FA.30MonalbiteNaAlSi3O8Mon. 2/m : B2/m
9.FA.35AlbiteNa(AlSi3O8)Tric. 1
9.FA.35Andesine(Na,Ca)[Al(Si,Al)Si2O8]Tric.
9.FA.35AnorthiteCa(Al2Si2O8)Tric. 1 : P1
9.FA.35Bytownite(Ca,Na)[Al(Al,Si)Si2O8]Tric.
9.FA.35Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
9.FA.35Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
9.FA.35ReedmergneriteNaBSi3O8Tric.
9.FA.40ParacelsianBa(Al2Si2O8)Mon.
9.FA.45SvyatoslaviteCa(Al2Si2O8)Orth.
9.FA.45KumdykoliteNa(AlSi3O8)Orth. mmm (2/m 2/m 2/m) : Pnnm
9.FA.50SlawsoniteSr(Al2Si2O8)Mon.
9.FA.55LisetiteCaNa2Al4Si4O16Orth.
9.FA.60BanalsiteNa2BaAl4Si4O16Orth.
9.FA.60StronalsiteNa2SrAl4Si4O16Orth.
9.FA.65DanburiteCaB2Si2O8Orth. mmm (2/m 2/m 2/m)
9.FA.65MaleeviteBaB2Si2O8Orth. mmm (2/m 2/m 2/m) : Pnma
9.FA.65PekoviteSrB2Si2O8
9.FA.70Lingunite(Na,Ca)AlSi3O8Tet. 4/m : I4/m
9.FA.75KokchetaviteK(AlSi3O8)Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm

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

76.2.1.1KalsiliteKAlSiO4Hex. 6 2 2 : P63 2 2
76.2.1.2Nepheline(Na,K)AlSiO4Hex. 6 : P63
76.2.1.3Trikalsilite(K,Na)AlSiO4Hex.
76.2.1.5KaliophiliteKAlSiO4Hex.
76.2.1.6Yoshiokaite(Ca,Na)[Al(Al,Si)O4]Trig. 3 : P3

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.4.1Nepheline(Na,K)AlSiO4Hex. 6 : P63
16.4.3Trikalsilite(K,Na)AlSiO4Hex.
16.4.4Anorthoclase(Na,K)AlSi3O8Tric.
16.4.5Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26Mon. 2/m : B2/m
16.4.6Montesommaite(K,Na)9Al9Si23O64 · 10H2OOrth.

Other InformationHide

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 PanunziteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sahama, Th.G., Smith, J.V. (1957) Tri-kalsilite, a new mineral. American Mineralogist: 42: 286.
Fleischer, M., Mandarino, J.A., Chao, G.Y. (1979) New mineral names. American Mineralogist: 64: 652-659.
Merlino, S., Franco, E., Mattia, C.A., Pasero, M., De Gennaro, M. (1985) The crystal structure of panunzite (natural tetrakalsilite). Neues Jahrbuch für Mineralogie, Monatshefte: 7: 322-328.
Franco, E., De Gennaro, M. (1988) Panunzite, a new mineral from Mt. Somma-Vesuvio, Italy. American Mineralogist: 73: 420-421.

Internet Links for PanunziteHide

Localities for PanunziteHide

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.
Italy (TL)
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
Franco, E., De Gennaro, M. (1988) Panunzite, a new mineral from Mt. Somma-Vesuvio, Italy. American Mineralogist: 73: 420-421.; Lapis 1994:5 p.13-23,58]
  • Umbria
    • Terni Province
      • San Venanzo
Ciriotti, M.E., Fascio, L., Pasero, M. (2004): Italian Type Minerals. Felici, Ed. Pisa, CD-ROM
Mineral and/or Locality  
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