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Farneseite

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About FarneseiteHide

Formula:
(Na,Ca,K)56(Al6Si6O24)7(SO4)12 · 6H2O
Colour:
Colourless
Lustre:
Vitreous
Specific Gravity:
2.425 (Calculated)
Crystal System:
Hexagonal
Name:
Named for Farnese, Italy, near the type locality.
This page provides mineralogical data about Farneseite.


Classification of FarneseiteHide

Approved
Approval Year:
2004
9.FB.05

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
B : Tektosilicates with additional anions

Physical Properties of FarneseiteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Poor on {001}
Parting:
None observed
Fracture:
Conchoidal
Density:
2.425 g/cm3 (Calculated)

Optical Data of FarneseiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.499 nε = 1.503
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Non-pleochroic

Chemical Properties of FarneseiteHide

Formula:
(Na,Ca,K)56(Al6Si6O24)7(SO4)12 · 6H2O
IMA Formula:
Na46Ca10(Si42Al42O168)(SO4)12 · 6H2O

Crystallography of FarneseiteHide

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 12.8784 Å, c = 37.0078 Å
Ratio:
a:c = 1 : 2.874
Unit Cell V:
5,315.54 ų (Calculated from Unit Cell)
Twinning:
Twinning was not observed, but evidence for a (1–10) twin was found during the structural refinement.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.404(20)
3.862(23)
3.722(100)
3.668(26)
3.485(65)
3.119(36)
2.648(32)
2.149(34)
Comments:
From type description.

Type Occurrence of FarneseiteHide

General Appearance of Type Material:
small prismatic crystals in vugs in fine-grained syenite-looking rock
Place of Conservation of Type Material:
Museum of Mineralogy, University of Rome, La Sapienza (MMUR), 33000/1.

Synonyms of FarneseiteHide

Other Language Names for FarneseiteHide

Simplified Chinese:法那西石
Traditional Chinese:法那西石

Related Minerals - Nickel-Strunz GroupingHide

9.FB.05Afghanite(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6Trig. 3m : P3 1c
9.FB.05Bystrite(Na,K)7Ca(Al6Si6O24)(S5)ClHex.
9.FB.05Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2OHex. 6 : P63
9.FB.05CancrisiliteNa7(Al5Si7O24)(CO3) · 3H2OHex.
9.FB.05Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2Hex. 6/m : P63/m
9.FB.05Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2OHex.
9.FB.05Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2Hex.
9.FB.05HydroxycancriniteNa8(Al6Si6O24)(OH)2 · 2H2OHex.
9.FB.05Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4Hex.
9.FB.05MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2Hex.
9.FB.05PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2OHex.
9.FB.05Quadridavyne(Na,K)6Ca2(Al6Si6O24)Cl4Hex.
9.FB.05Sacrofanite(Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6•2H2OHex.
9.FB.05Tounkite(Na,Ca,K)8(Al6Si6O24)(SO4)2Cl · H2OHex.
9.FB.05Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2OHex. 6 : P63
9.FB.05Marinellite(Na,K)42Ca6(Al6Si6O24)6(SO4)8Cl2 · 3H2OTrig. 3m : P3 1c
9.FB.05Alloriite(Na,Ca,K)26Ca4(Al6Si6O24)4(SO4)6Cl6Trig. 3m : P3 1c
9.FB.05Fantappièite[Na82.5Ca33K16.5](Si99Al99O396)(SO4)33 · 4H2OTrig. 3 : R3
9.FB.05KyanoxaliteNa7(Al6-xSi6+xO24)(C2O4)0.5+x · 5H2O (0 < x < 0.5)Hex. 6 : P63
9.FB.05Balliranoite(Na,K)6Ca2(Si6Al6O24)Cl2(CO3)Hex. 6 : P63
9.FB.05CarbobystriteNa8(Al6Si6O24)(CO3) · 3.5H2OTrig. 3m : P3 1c
9.FB.05DepmeieriteNa8(Al6Si6O24)(PO4,CO3)1-x · 3H2O (x<0.5)Hex. 6 : P63
9.FB.05KircheriteNa5Ca2K(Al6Si6O24)(SO4)2 · 0.33H2OTrig. 3 2 : R3 2
9.FB.10BicchuliteCa2(Al2SiO6)(OH)2Iso. 4 3m : I4 3m
9.FB.10DanaliteBe3Fe2+4(SiO4)3SIso. 4 3m : P4 3n
9.FB.10GenthelviteBe3Zn4(SiO4)3SIso. 4 3m : P4 3n
9.FB.10Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)Iso. 4 3m : P4 3n
9.FB.10HelvineBe3Mn2+4(SiO4)3SIso. 4 3m : P4 3n
9.FB.10KamaishiliteCa2(Al2SiO6)(OH)2Tet.
9.FB.10LazuriteNa6Ca2(Al6Si6O24)(SO4,S,S2, S3,Cl,OH)2Iso. 4 3m : P4 3n
9.FB.10NoseanNa8(Al6Si6O24)(SO4) · H2OIso. 4 3m : P4 3n
9.FB.10SodaliteNa8(Al6Si6O24)Cl2Iso. 4 3m : P4 3n
9.FB.10Tsaregorodtsevite(N(CH3)4)(AlSi5O12)Orth.
9.FB.10TugtupiteNa4BeAlSi4O12ClTet. 4 : I4
9.FB.15MarialiteNa4Al3Si9O24ClTet. 4/m : I4/m
9.FB.15MeioniteCa4Al6Si6O24CO3Tet. 4/m : I4/m
9.FB.15Silvialite(Ca,Na)4(Al6Si6O24)(SO4,CO3)Tet. 4/m : I4/m

Fluorescence of FarneseiteHide

None observed.

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 FarneseiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Cámara, F., Bellatreccia, F., Della Ventura, G., Mottana, A. (2005) Farneseite, a new mineral of the cancrinite-sodalite group with a 14-layer stacking sequence: occurrence and crystal structure. European Journal of Mineralogy: 17: 839-846.

Internet Links for FarneseiteHide

Localities for FarneseiteHide

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)
 
  • Latium
    • Viterbo Province
      • Làtera volcano
        • Farnese
F. Cámara, F. Bellatreccia, G. Della Ventura and A. Mottana (2005): "Farneseite, a new mineral of the cancrinite-sodalite group with a 14-layer stacking sequence: occurrence and crystal structure", Eur. J. Mineral. 17, 839-846.
Di Domenico Dario
        • Valentano
Stephan Wolfsried collection
  • Tuscany
    • Grosseto Province
      • Pitigliano
Mattei, L., Americolo, F. (2009): Nuovo ritrovamento di farneseite a Poggio Bottinello. Il Cercapietre, 1-2 /2009, 69.
Mineral and/or Locality  
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