Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Thickness: 30 µm Order divisions

Rotation:

Surface Relief:

None to Very Low
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.

Focus:

In focus

Interference Figure:

This shows the idealized uniaxial interference figure - the conoscopic (convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis centred and vertical. The coloured rings are isochromatics, computed with the same physics as the Michel-Lévy bar above; the dark cross is the isogyre.

For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.

Thickness: 30 µm

Chemistry of QuadridavyneHide

Mindat Formula:

(Na,K)₆Ca₂(Al₆Si₆O₂₄)Cl₄

Element Weights:

Element	% weight
O	35.743 %
Si	15.686 %
Al	15.069 %
Cl	13.201 %
Na	12.840 %
Ca	7.461 %

Calculated from ideal end-member formula.

Elements listed:

Al, Ca, Cl, K, Na, O, Si - search for minerals with similar chemistry

Common Impurities:

Crystallography of QuadridavyneHide

Crystal System:

Hexagonal

Class (H-M):

6/m - Dipyramidal

Space Group:

P6₃/m

Cell Parameters:

a = 25.77 Å, c = 5.37 Å

Ratio:

a:c = 1 : 0.208

Unit Cell V:

3,088.40 Å³ (Calculated from Unit Cell)

Morphology:

Hexagonal prismatic. Dominant fonus are {0001} and {1010}.

Twinning:

Twinning (1100) has been frequently observed.

Crystal StructureHide

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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

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CIF File Best | x | y | z | a | b | c

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0006545	Quadridavyne	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		1994	Vesuvius, Italy	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Quadridavyne'
loop_
_publ_author_name
'Bonaccorsi E'
'Merlino S'
'Orlandi P'
'Pasero M'
'Vezzalini G'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 6 
_journal_year 1994
_journal_page_first 481
_journal_page_last 487
_publ_section_title
;
 Quadridavyne, [(Na,K)6Cl2][Ca2Cl2][Si6Al6O24], a new feldspathoid
 mineral from Vesuvius area
 Note: Cl1 y-coordinate altered
;
_database_code_amcsd 0006545
_chemical_compound_source 'Vesuvius, Italy'
_chemical_formula_sum 'Na8.16 K3.84 Si12 Al12 O48 Ca4 Cl8'
_cell_length_a 25.771
_cell_length_b 25.771
_cell_length_c 5.371
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 3089.216
_exptl_crystal_density_diffrn      2.376
_symmetry_space_group_name_H-M 'P 63/m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x-y,x,-z'
  '-x+y,-x,z'
  '-y,x-y,1/2-z'
  'y,-x+y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Naint(ab)   0.05200   0.10600   0.25000   0.28000
Kint(ab)   0.05200   0.10600   0.25000   0.10000
Namid(ab)   0.06800   0.13900   0.25000   0.24000
Kmid(ab)   0.06800   0.13900   0.25000   0.12000
Naext(ab)   0.09100   0.18200   0.25000   0.20000
Kext(ab)   0.09100   0.18200   0.25000   0.06000
Naint(c1)   0.39100   0.43900   0.25000   1.00000
Naint(c2)   0.58700   0.41400   0.25000   1.00000
Kext(c)   0.59100   0.68300   0.25000   1.00000
Si1   0.16150   0.20490   0.75000   1.00000
Si2   0.29210   0.45970   0.75000   1.00000
Si3   0.04100   0.33500   0.75000   1.00000
Si4   0.20820   0.54080   0.25000   1.00000
Al1   0.03450   0.20820   0.75000   1.00000
Al2   0.29900   0.33300   0.75000   1.00000
Al3   0.16800   0.46400   0.75000   1.00000
Al4   0.20900   0.66920   0.25000   1.00000
O1   0.10500   0.21500   0.75000   1.00000
O2   0.06000   0.28440   0.75000   1.00000
O3   0.17200   0.00200   0.02000   1.00000
O5   0.29400   0.39900   0.75000   1.00000
O6   0.21100   0.27300   0.75000   1.00000
O7   0.66700  -0.00500   0.02100   1.00000
O8   0.66900   0.50600   0.50800   1.00000
O9   0.10600   0.39800   0.75000   1.00000
O10   0.22300   0.44500   0.75000   1.00000
O11   0.17400   0.51100   0.99300   1.00000
O13   0.22000   0.60800   0.25000   1.00000
O14   0.27600   0.55300   0.25000   1.00000
Ca1   0.66667   0.33333   0.75000   1.00000
Cl1   0.66667   0.33333   0.25000   1.00000
Ca2   0.33400   0.16900   0.25000   1.00000
Cl2   0.31300   0.15610   0.75000   1.00000
Cl(a)  -0.01800   0.02400   0.25000   0.16667
Cl(b)   0.02900   0.04700   0.25000   0.16667
Cl(c)   0.52900   0.54700   0.25000   1.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.71 Å	(Very strong)
3.31 Å	(Very strong)
4.80 Å	(Strong)
2.788 Å	(Strong)
2.677 Å	(Medium)
2.474 Å	(Medium)
2.147 Å	(Medium)

Comments:

Can be distinguished from davyne only by single-crystal diffraction.

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 3a: Earth’s earliest Hadean crust	>4.50
9 : Lava/xenolith minerals (hornfels, sanidinite facies)
High-? alteration and/or metamorphism
31 : Thermally altered carbonate, phosphate, and iron formations
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of QuadridavyneHide

Type Locality:

ⓘ Ottaviano, Metropolitan City of Naples, Campania, Italy

General Appearance of Type Material:

Transparent, colorless, prismatic crystals, elongated [001] with hexagonal outline, up to 2 mm in length and 0.5 mm in
diameter.

Place of Conservation of Type Material:

University of Pisa, Pisa, Italy, 10014.

Geological Setting of Type Material:

Volcanic ash samples that also contain lithic fragments composed of metasomatized and hydrothermally altered lavas and scoriae.

Synonyms of QuadridavyneHide

IMA1990-054

Other Language Names for QuadridavyneHide

German:Quadridavyn

Russian:Квадридавин

Relationship of Quadridavyne to other SpeciesHide

Member of:

Cancrinite Group > Feldspathoid Group

Other Members of Cancrinite Group:

Afghanite	(Na,K)₂₂Ca₁₀(Si₂₄Al₂₄O₉₆)(SO₄)₆Cl₆	Trig. 3m : P31c
Alloriite	(Na,Ca,K)₂₆Ca₄(Al₆Si₆O₂₄)₄(SO₄)₆Cl₆	Trig. 3m : P31c
Balliranoite	(Na,K)₆Ca₂(Si₆Al₆O₂₄)Cl₂(CO₃)	Hex. 6 : P6₃
Betzite	Na₆Ca₂(Al₆Si₆O₂₄)Cl₄	Hex. 6 : P6₃
Biachellaite	(Na,Ca,K)₈(Al₆Si₆O₂₄)(SO₄)₂(OH)_0.5 · H₂O	Trig. 3 : P3
Bystrite	(Na,K)₇Ca(Al₆Si₆O₂₄)(S₅)Cl	Trig. 3m : P31c
Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O	Hex. 6 : P6₃
Cancrisilite	Na₇(Al₅Si₇O₂₄)(CO₃) · 3H₂O	Hex. 6mm : P6₃mc
Carbobystrite	Na₈(Al₆Si₆O₂₄)(CO₃) · 3.5H₂O	Trig. 3m : P31c
Davyne	(Na,K)₆Ca₂(Al₆Si₆O₂₄)(Cl₂,SO₄)₂	Hex. 6/m : P6₃/m
Depmeierite	Na₈(Al₆Si₆O₂₄)(PO₄,CO₃)_1-x · 3H₂O (x<0.5)	Hex. 6 : P6₃
Fantappièite	[Na_82.5Ca₃₃K_16.5](Si₉₉Al₉₉O₃₉₆)(SO₄)₃₃ · 4H₂O	Trig. 3 : R3
Farneseite	(Na,Ca,K)₅₆(Al₆Si₆O₂₄)₇(SO₄)₁₂ · 6H₂O	Hex. 6/m : P6₃/m
Franzinite	(Na,K)₆Ca₂(Al₆Si₆O₂₄)(SO₄)₂ · 0.5H₂O	Hex.
Giuseppettite	(Na,K,Ca)_7-8(Al₆Si₆O₂₄)(SO₄,Cl)_1-2	Trig. 3m : P31c
Hydroxycancrinite	Na₈(Al₆Si₆O₂₄)(OH)₂ · 2H₂O	Hex. 6 : P6₃
Kircherite	Na₅Ca₂K(Al₆Si₆O₂₄)(SO₄)₂ · 0.33H₂O	Trig. 32 : R32
Kyanoxalite	Na₇(Al_6-xSi_6+xO₂₄)(C₂O₄)_0.5+x · 5H₂O (0 < x < 0.5)	Hex. 6 : P6₃
Liottite	(Na,K)₁₆Ca₈(Al₆Si₆O₂₄)₃(SO₄)₅Cl₄	Hex. 6 : P6
Marinellite	(Na,K)₄₂Ca₆(Al₆Si₆O₂₄)₆(SO₄)₈Cl₂ · 3H₂O	Trig. 3m : P31c
Microsommite	Na₄K₂Ca₂(Al₆Si₆O₂₄)(SO₄)Cl₂	Hex. 622 : P6₃22
Pitiglianoite	Na₆K₂(Al₆Si₆O₂₄)(SO₄) · 2H₂O	Hex. 6 : P6₃
Sacrofanite	(Na₆₁K₁₉Ca₃₂)(Si₈₄Al₈₄O₃₃₆)(SO₄)₂₆Cl₂F₆ · 2H₂O	Hex.
Steudelite	Na₃(K₁₇Ca₇)Ca₄(Al₂₄Si₂₄O₉₆)(SO₃)₆F₆ · 4H₂O	Hex. 6m2 : P62c
Sulfhydrylbystrite	Na₅K₂Ca[Al₆Si₆O₂₄](S₅)₂(SH)	Trig. 3m : P31c
Tounkite	(Na,Ca,K)₈(Si₆Al₆)O₂₄(SO₄)₂Cl · 0.5H₂O	Hex. 622 : P6₂22
'UM2004-48-SiO:AlClCaNaS'	(Na,Ca)₈(Si₆Al₆)O₂₄(SO₄)_1.7Cl_1.3
'UM2009-23-SiO:AlCCaClHKNaS'	(Na,Ca)₂₄K₁₀[(Si,Al)₆₀O₁₂₀](SO₄)_5.6Cl_1.5(CO₃)_0.4 · 11H₂O	Trig. 3 : P3
Vishnevite	(Na,K)₈(Al₆Si₆O₂₄)(SO₄,CO₃) · 2H₂O	Hex. 6 : P6₃

Related Minerals - Strunz-mindat Grouping Hide

9.FB.	Perchukite-(Y)	PbYAsSi₂O₈	Mon. 2/m : B2/b
9.FB.	Åsgruvanite-(Ce)	Ce₁₆Ca₅Al(SiO₄)₆(AsO₃)₈(CO₃)₂Cl₄F₃(OH)₂	Trig. 3m(32/m) : P3m1
9.FB.	Steudelite	Na₃(K₁₇Ca₇)Ca₄(Al₂₄Si₂₄O₉₆)(SO₃)₆F₆ · 4H₂O	Hex. 6m2 : P62c
9.FB.	Wenlanzhangite-(Y)	Y₂V³⁺₂V⁴⁺₂(SiO₄)₂O₄(OH)₄	Tric. 1 : P1
9.FB.	Slyudyankaite	Na₂₈Ca₄(Si₂₄Al₂₄O₉₆)(SO₄)₆(S₆)_1/3(CO₂) · 2H₂O	Tric. 1 : P1
9.FB.	Bolotinaite	(Na₇◻)(Al₆Si₆O₂₄)F · 4H₂O	Iso. 43m : I43m
9.FB.	Sapozhnikovite	Na₈(Al₆Si₆O₂₄)(HS)₂	Iso. 43m : P43n
9.FB.	Betzite	Na₆Ca₂(Al₆Si₆O₂₄)Cl₄	Hex. 6 : P6₃
9.FB.05	Sulfhydrylbystrite	Na₅K₂Ca[Al₆Si₆O₂₄](S₅)₂(SH)	Trig. 3m : P31c
9.FB.05	Marinellite	(Na,K)₄₂Ca₆(Al₆Si₆O₂₄)₆(SO₄)₈Cl₂ · 3H₂O	Trig. 3m : P31c
9.FB.05	Afghanite	(Na,K)₂₂Ca₁₀(Si₂₄Al₂₄O₉₆)(SO₄)₆Cl₆	Trig. 3m : P31c
9.FB.05	Bystrite	(Na,K)₇Ca(Al₆Si₆O₂₄)(S₅)Cl	Trig. 3m : P31c
9.FB.05	Franzinite	(Na,K)₆Ca₂(Al₆Si₆O₂₄)(SO₄)₂ · 0.5H₂O	Hex.
9.FB.05	Kyanoxalite	Na₇(Al_6-xSi_6+xO₂₄)(C₂O₄)_0.5+x · 5H₂O (0 < x < 0.5)	Hex. 6 : P6₃
9.FB.05	Vishnevite	(Na,K)₈(Al₆Si₆O₂₄)(SO₄,CO₃) · 2H₂O	Hex. 6 : P6₃
9.FB.05	Farneseite	(Na,Ca,K)₅₆(Al₆Si₆O₂₄)₇(SO₄)₁₂ · 6H₂O	Hex. 6/m : P6₃/m
9.FB.05	Alloriite	(Na,Ca,K)₂₆Ca₄(Al₆Si₆O₂₄)₄(SO₄)₆Cl₆	Trig. 3m : P31c
9.FB.05	Liottite	(Na,K)₁₆Ca₈(Al₆Si₆O₂₄)₃(SO₄)₅Cl₄	Hex. 6 : P6
9.FB.05	Depmeierite	Na₈(Al₆Si₆O₂₄)(PO₄,CO₃)_1-x · 3H₂O (x<0.5)	Hex. 6 : P6₃
9.FB.05	Biachellaite	(Na,Ca,K)₈(Al₆Si₆O₂₄)(SO₄)₂(OH)_0.5 · H₂O	Trig. 3 : P3
9.FB.05	Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O	Hex. 6 : P6₃
9.FB.05	Cancrisilite	Na₇(Al₅Si₇O₂₄)(CO₃) · 3H₂O	Hex. 6mm : P6₃mc
9.FB.05	Fantappièite	[Na_82.5Ca₃₃K_16.5](Si₉₉Al₉₉O₃₉₆)(SO₄)₃₃ · 4H₂O	Trig. 3 : R3
9.FB.05	Carbobystrite	Na₈(Al₆Si₆O₂₄)(CO₃) · 3.5H₂O	Trig. 3m : P31c
9.FB.05	Microsommite	Na₄K₂Ca₂(Al₆Si₆O₂₄)(SO₄)Cl₂	Hex. 622 : P6₃22
9.FB.05	Pitiglianoite	Na₆K₂(Al₆Si₆O₂₄)(SO₄) · 2H₂O	Hex. 6 : P6₃
9.FB.05	Tounkite	(Na,Ca,K)₈(Si₆Al₆)O₂₄(SO₄)₂Cl · 0.5H₂O	Hex. 622 : P6₂22
9.FB.05	Balliranoite	(Na,K)₆Ca₂(Si₆Al₆O₂₄)Cl₂(CO₃)	Hex. 6 : P6₃
9.FB.05	Giuseppettite	(Na,K,Ca)_7-8(Al₆Si₆O₂₄)(SO₄,Cl)_1-2	Trig. 3m : P31c
9.FB.05	Sacrofanite	(Na₆₁K₁₉Ca₃₂)(Si₈₄Al₈₄O₃₃₆)(SO₄)₂₆Cl₂F₆ · 2H₂O	Hex.
9.FB.05	Kircherite	Na₅Ca₂K(Al₆Si₆O₂₄)(SO₄)₂ · 0.33H₂O	Trig. 32 : R32
9.FB.05	Hydroxycancrinite	Na₈(Al₆Si₆O₂₄)(OH)₂ · 2H₂O	Hex. 6 : P6₃
9.FB.05	Davyne	(Na,K)₆Ca₂(Al₆Si₆O₂₄)(Cl₂,SO₄)₂	Hex. 6/m : P6₃/m
9.FB.10	Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)	Iso. 43m : P43n
9.FB.10	Lazurite	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O	Iso. 43m : P43n
9.FB.10	Danalite	Be₃Fe²⁺₄(SiO₄)₃S	Iso. 43m : P43n
9.FB.10	Helvine	Be₃Mn²⁺₄(SiO₄)₃S	Iso. 43m : P43n
9.FB.10	Kamaishilite	Ca₂(Al₂SiO₆)(OH)₂	Tet.
9.FB.10	Sodalite	Na₄(Si₃Al₃)O₁₂Cl	Iso. 43m : P43n
9.FB.10	Nosean	Na₈(Al₆Si₆O₂₄)(SO₄) · H₂O	Iso. 43m : P43n
9.FB.10	Genthelvite	Be₃Zn₄(SiO₄)₃S	Iso. 43m : P43n
9.FB.10	Bicchulite	Ca₂(Al₂SiO₆)(OH)₂	Iso. 43m : I43m
9.FB.10	Tsaregorodtsevite	(N(CH₃)₄)(AlSi₅O₁₂)	Orth. 222 : I222
9.FB.10	Vladimirivanovite	Na₆Ca₂(Al₆Si₆O₂₄)(SO₄,S₃,S₂,Cl)₂ · H₂O	Orth. mmm(2/m2/m2/m)
9.FB.10	Tugtupite	(BeAlSi)Na₄(SiO₄)₃Cl	Tet. 4 : I4
9.FB.15	Marialite	Na₄Al₃Si₉O₂₄Cl	Tet. 4/m : I4/m
9.FB.15	Meionite	Ca₄Al₆Si₆O₂₄CO₃	Tet. 4/m : I4/m
9.FB.15	Silvialite	(Ca,Na)₄(Al₆Si₆O₂₄)(SO₄,CO₃)	Tet. 4/m : I4/m

Fluorescence of QuadridavyneHide

In UV light:

Not fluorescent.

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.

Internet Links for QuadridavyneHide

mindat.org URL:

https://www.mindat.org/min-3335.html
Please feel free to link to this page.

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External Links:

Look for Quadridavyne on Webmineral

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Look for Quadridavyne on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Buy from D. Joyce minerals

References for QuadridavyneHide

Reference List:

Bonaccorsi, Elena, Merlino, Stefano, Orlandi, Paolo, Pasero, Marco, Vezzalini, Giovanna (1994) Quadridavyne [(Na,K)₆Cl₂][Ca₂Cl₂][Si₆Al₆O₂₄], a new feldspathoid mineral from Vesuvius area. European Journal of Mineralogy, 6 (4) 481-487 doi:10.1127/ejm/6/4/0481

Jambor, J.L., Kovalenker, V.A., Roberts, A.C. (1995) New mineral names. American Mineralogist, 80, 630-635.

Mandarino, Joseph A. (1997) New Minerals 1990-1994. The Mineralogical Record Inc., Tuscon, Arizona. 220pp.

(2001) Quadridavyne. Handbook of Mineralogy. Mineralogical Society of America

Localities for QuadridavyneHide

Showing 3 localities.

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.

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Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Germany
Rhineland-Palatinate Mayen-Koblenz Vordereifel Ettringen ⓘ Caspar quarry	Blaß et al. (2001)

Italy
Campania Metropolitan City of Naples ⓘ Mount Vesuvius	Russo et al. (2004)
ⓘ Ottaviano (TL)	Bonaccorsi et al. (1994)

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Quadridavyne

About QuadridavyneHide

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IMA Classification of QuadridavyneHide

Classification of QuadridavyneHide

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Physical Properties of QuadridavyneHide

Optical Data of QuadridavyneHide