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Quadridavyne

Formula:
(Na,K)
 
6
Ca
 
2
[Cl
 
4
|Al
 
6
Si
 
6
O
 
24
]
System:HexagonalColour:Colourless
Hardness:5
Name:The name reflects its unit-cell volume, which is QUADRupled relative to that of Davyne.


Cancrinite Group.

Classification of Quadridavyne

IMA status:Approved 1990
Strunz 8th edition ID:8/J.09-25
Nickel-Strunz 10th (pending) edition ID:9.FB.05

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
B : Tektosilicates with additional anions
Dana 8th edition ID:76.2.5.12

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
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Type Occurrence of Quadridavyne

Type Locality:Ottaviano, Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy
Year of Discovery:1994

Physical Properties of Quadridavyne

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless
Streak:White
Hardness (Mohs):5
Cleavage:Perfect

Crystallography of Quadridavyne

Crystal System:Hexagonal
Cell Parameters:a = 25.77Å, c = 5.37Å
Ratio:a:c = 1 : 0.208
Unit Cell Volume:V 3,088.40 ų (Calculated from Unit Cell)

Optical Data of Quadridavyne

Type:Uniaxial (+)
RI values: nω = 1.529 nε = 1.532
Maximum Birefringence:δ = 0.003

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Quadridavyne

Formula:
(Na,K)
 
6
Ca
 
2
[Cl
 
4
|Al
 
6
Si
 
6
O
 
24
]
Essential elements:Al, Ca, Cl, Na, O, Si
All elements listed in formula:Al, Ca, Cl, K, Na, O, Si
Common Impurities:S

Relationship of Quadridavyne to other Species

Related to:
  • Cancrinite Group
  • Related Minerals - Nickel-Strunz Grouping):
    9.FB.05Afghanite
    (Na,Ca,K)
     
    8
    [(Cl
     
    2
    ,SO
     
    4
    ,CO
     
    3
    )
     
    3
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ] · 0.5H
     
    2
    O
    9.FB.05Bystrite
    (Na,K)
     
    7
    Ca[(S
     
    3
    )
     
    1.5
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ] · H
     
    2
    O
    9.FB.05Cancrinite
    Na
     
    6
    Ca
     
    2
    [(CO
     
    3
    )
     
    2
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ] · 2H
     
    2
    O
    9.FB.05Cancrisilite
    Na
     
    7
    [CO
     
    3
    |Al
     
    5
    Si
     
    7
    O
     
    24
    ] · 3H
     
    2
    O
    9.FB.05Davyne
    (Na,K)
     
    6
    Ca
     
    2
    [(Cl
     
    2
    ,SO
     
    4
    )
     
    2
    |Al
     
    6
    Si
     
    6
    SO
     
    24
    ]
    9.FB.05Franzinite
    (Na,K)
     
    6
    Ca
     
    2
    [(SO
     
    4
    )
     
    2
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ] · 0.5H
     
    2
    O
    9.FB.05Giuseppettite
    (Na,K,Ca)
     
    7-8
    [(SO
     
    4
    ,Cl)
     
    1-2
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ]
    9.FB.05Hydroxycancrinite
    Na
     
    8
    [(OH)
     
    2
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ] · 2H
     
    2
    O
    9.FB.05Liottite
    (Na,K)
     
    16
    Ca
     
    8
    [Cl
     
    4
    |(SO
     
    4
    )
     
    5
    |(Al
     
    6
    Si
     
    6
    O
     
    24
    )
     
    3
    ]
    9.FB.05Microsommite
    Na
     
    4
    K
     
    2
    Ca
     
    2
    [Cl
     
    2
    |SO
     
    4
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ]
    9.FB.05Pitiglianoite
    Na
     
    6
    K
     
    2
    [SO
     
    4
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ] · 2H
     
    2
    O
    9.FB.05Sacrofanite
    (Na,Ca,K)
     
    9
    [{(OH)
     
    2
    ,SO
     
    4
    ,CO
     
    3
    ,Cl
     
    2
    }
     
    3
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ] · 0.5H
     
    2
    O
    9.FB.05Tounkite
    (Na,Ca,K)
     
    8
    [Cl|(SO
     
    4
    )
     
    2
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ] · H
     
    2
    O
    9.FB.05Vishnevite
    (Na,K)
     
    8
    [(SO
     
    4
    ,CO
     
    3
    )|Al
     
    6
    Si
     
    6
    O
     
    24
    ] · 2H
     
    2
    O
    9.FB.05Marinellite
    (Na,K)
     
    42
    Ca
     
    6
    [Cl
     
    2
    |(SO
     
    4
    )
     
    8
    |(Al
     
    6
    Si
     
    6
    O
     
    24
    )
     
    6
    ] · 3 H
     
    2
    O
    9.FB.05Farneseite
    (Na,Ca,K)
     
    56
    [(SO
     
    4
    )
     
    12
    |Al
     
    42
    Si
     
    42
    O
     
    168
    ] · 6H
     
    2
    O
    9.FB.05Alloriite
    (Na,Ca,K)
     
    26
    Ca
     
    4
    [Cl
     
    6
    |(SO
     
    4
    )
     
    6
    |(Al
     
    6
    Si
     
    6
    O
     
    24
    )
     
    4
    ]
    9.FB.05IMA2008-006
    [Na
     
    82.5
    Ca
     
    33
    K
     
    16.5
    ]
     
    132
    (Si
     
    99
    Al
     
    99
    O
     
    396
    )(SO
     
    4
    )
     
    33
    ·4H
     
    2
    O
    9.FB.10Bicchulite
    Ca
     
    2
    [(OH)
     
    2
    |Al
     
    2
    SiO
     
    6
    ]
    9.FB.10Danalite
    Fe
    2+
    4
    Be
     
    3
    [S|(SiO
     
    4
    )
     
    3
    ]
    9.FB.10Genthelvite
    Zn
     
    4
    Be
     
    3
    [S|(SiO
     
    4
    )
     
    3
    ]
    9.FB.10Haüyne
    (Na,Ca)
     
    4-8
    [Al
     
    6
    Si
     
    6
    (O,S)
     
    24
    ](SO
     
    4
    ,Cl)
     
    1-2
    9.FB.10Helvite
    Mn
    2+
    4
    Be
     
    3
    [S|(SiO
     
    4
    )
     
    3
    ]
    9.FB.10Kamaishilite
    Ca
     
    2
    [(OH)
     
    2
    |Al
     
    2
    SiO
     
    6
    ]
    9.FB.10Lazurite
    (Na,Ca)
     
    8
    [(S,SO
     
    4
    ,Cl
     
    2
    )|Al
     
    6
    Si
     
    6
    O
     
    24
    ]
    9.FB.10Nosean
    Na
     
    8
    [SO
     
    4
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ]
    9.FB.10Sodalite
    Na
     
    8
    [Cl
     
    2
    |Al
     
    6
    Si
     
    6
    O
     
    24
    ]
    9.FB.10Tsaregorodtsevite
    N(CH
     
    3
    )
     
    4
    [AlSi
     
    5
    O
     
    12
    ]
    9.FB.10Tugtupite
    Na
     
    4
    [Cl|BeAlSi
     
    4
    O
     
    12
    ]
    9.FB.10Helvine
    9.FB.15Marialite
    Na
     
    4
    [Cl|(AlSi
     
    3
    O
     
    8
    )
     
    3
    ]
    9.FB.15Meionite
    Ca
     
    4
    [CO
     
    3
    |(Al
     
    2
    Si
     
    2
    O
     
    8
    )
     
    3
    ]
    9.FB.15Silvialite
    (Ca,Na)
     
    4
    [(SO
     
    4
    ,CO
     
    3
    )|(Al
     
    2
    Si
     
    2
    O
     
    8
    )
     
    3
    ]

    Other Names for Quadridavyne

    Synonyms:
    IMA1990-054
    German names:
    Quadridavyn
    Russian names:
    Квадридавин

    Other Information

    Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

    References for Quadridavyne

    Reference List:European Journal of Mineralogy (1994): 6: 481-487.

    New Minerals (1997), New Minerals 1990-1994.

    Internet Links for Quadridavyne

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Quadridavyne in the Natural History Museum (London) online catalogue
  • Quadridavyne details from Handbook of Mineralogy (PDF)
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    Localities for Quadridavyne

    The 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.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Mayen
          • Ettringen
    Blass, G., Graf, H.W., Interessante Neuigkeiten über Cancrinit, Fluorit und Fuchsit aus der Vulkaneifel – , Mineralien-Welt 12/1, 26-29, 2001
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
          • Monte Somma
    Leoni, L., Mellini, M., Merlino, S., Orlandi, P. (1979): Cancrinite-like minerals: new data and crystal chemical considerations. Rendiconti della Società Italiana di Mineralogia e Petrologia, 35, 713-719; Bonaccorsi, E., Merlino, S., Orlandi, P., Pasero, M., Vezzalini, G. (1994): Quadridavyne, [(Na,K)6Cl2][Ca2Cl2][Si6Al6O24], a new feldspathoid mineral from Vesuvius area. European Journal of Mineralogy, 6, 481-487.
    Russo, M., Punzo, I. (2004): I minerali del Somma-Vesuvio, AMI
    Mineral and/or Locality
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