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Zircophyllite

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Formula:
(K,Na)3(Mn,Fe2+)7(Zr,Ti)2Si8O24(O,OH,F)7
Colour:
Black-brown
Lustre:
Adamantine, Vitreous
Hardness:
4 - 4½
Crystal System:
Triclinic
Name:
Named after its chemical composition containing Zirconium and analogy to Astrophyllite (Greek φύλλον (fyllon), 'leaf', alluding to its micaceous habit).

Classification of Zircophyllite

Approved
Approval Year:
1971
9.DC.05

9 : SILICATES (Germanates)
D : Inosilicates
C : Inosilicates with branched 2-periodic single chains; Si2O6 + 2SiO3 Si4O12
69.1.1.5

69 : INOSILICATES Chains with Side Branches or Loops
1 : Chains with Side Branches or Loops with (P=2, and N=4, 2 branches)
17.1.26

17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)

Physical Properties of Zircophyllite

Adamantine, Vitreous
Colour:
Black-brown
Streak:
Light brown
Hardness:
4 - 4½ on Mohs scale

Optical Data of Zircophyllite

Type:
Biaxial (-)
RI values:
nα = 1.708 nβ = 1.738 nγ = 1.747
2V:
Measured: 62° , Calculated: 56°
Max Birefringence:
δ = 0.039
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v weak

Chemical Properties of Zircophyllite

Formula:
(K,Na)3(Mn,Fe2+)7(Zr,Ti)2Si8O24(O,OH,F)7
IMA Formula:
K2NaMn2+7Zr2(Si4O12)2O2(OH)4F
Common Impurities:
Ti,Hf,H2O

Crystallography of Zircophyllite

Crystal System:
Triclinic

Type Occurrence of Zircophyllite

Synonyms of Zircophyllite

Other Language Names for Zircophyllite

Relationship of Zircophyllite to other Species

Other Members of this group:
AstrophylliteK2NaFe2+7Ti2Si8O28(OH)4F
BulgakiteLi2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(F,O)(H2O)2
Hydroastrophyllite(H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31
NalivkiniteLi2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4F
Niobophyllite(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31
Tarbagataite(K□)Ca(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)5

Related Minerals - Nickel-Strunz Grouping

9.DC.05AstrophylliteK2NaFe2+7Ti2Si8O28(OH)4F
9.DC.05Hydroastrophyllite(H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31
9.DC.05Kupletskite(K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4F
9.DC.05LobanoviteK2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4
9.DC.05Niobophyllite(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31
9.DC.05Kupletskite-(Cs)(Cs,K,Na)3(Mn,Fe2+)7(Ti,Nb)2Si8O24(O,OH,F)7
9.DC.05NiobokupletskiteK2NaMn2+7(Nb,Ti)(Si4O12)2O2(OH)4(O,F)
9.DC.05NalivkiniteLi2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4F
9.DC.05SveinbergeiteCa(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4

Related Minerals - Hey's Chemical Index of Minerals Grouping

17.1.1HectoriteNa0.3(Mg,Li)3(Si4O10)(F,OH)2
17.1.3AgrelliteNaCa2Si4O10F
17.1.4Fluorapophyllite-(Na)NaCa4(Si8O20)F · 8H2O
17.1.5Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
17.1.6Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
17.1.7HsianghualiteCa3Li2(Be3Si3O12)F2
17.1.8LeucophaniteNaCaBeSi2O6F
17.1.9NorbergiteMg3(SiO4)(F,OH)2
17.1.10Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
17.1.11Humite(Mg,Fe2+)7(SiO4)3(F,OH)2
17.1.12ClinohumiteMg9(SiO4)4F2
17.1.13CanasiteK3Na3Ca5Si12O30(OH)4
17.1.14Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O
17.1.15CuspidineCa4(Si2O7)(F,OH)2
17.1.16BultfonteiniteCa2(HSiO4)F · H2O
17.1.17ZeophylliteCa13Si10O28(OH)2F8 · 6H2O
17.1.18Rowlandite-(Y)(Y,Ce)4Fe2+(Si2O7)2F2 (?)
17.1.19YuksporiteK4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3
17.1.20Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
17.1.21Mosandrite-(Ce)(Ca3REE)[(H2O)2Ca0.50.5]Ti(Si2O7)2(OH)2(H2O)2
17.1.22Hiortdahlite(Na,Ca)2Ca4Zr(Mn,Ti,Fe)(Si2O7)2(F,O)4
17.1.23BurpaliteNa2CaZr(Si2O7)F2
17.1.24SeidozeriteNa4MnZr2Ti(Si2O7)2O2F2
17.1.25Thorosteenstrupine(Ca,Th,Mn)3Si4O11F · 6H2O
17.1.27JinshajiangiteBaNaFe2+4Ti2(Si2O7)2O2(OH)2F
17.1.28RosenbuschiteNa6Ca6Zr3Ti(Si2O7)4O2F6
17.1.29NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2
17.1.30SonoliteMn2+9(SiO4)4(OH)2

Related Minerals - Dana Grouping (8th Ed.)

69.1.1.1AstrophylliteK2NaFe2+7Ti2Si8O28(OH)4F
69.1.1.2Kupletskite(K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4F
69.1.1.3Kupletskite-(Cs)(Cs,K,Na)3(Mn,Fe2+)7(Ti,Nb)2Si8O24(O,OH,F)7
69.1.1.4Niobophyllite(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31
69.1.1.5NalivkiniteLi2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4F
69.1.1.6Hydroastrophyllite(H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31
69.1.1.6SveinbergeiteCa(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4
69.1.1.7LobanoviteK2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4

Other Information

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 Zircophyllite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
KAPUSTIN, Y.L. (1972): Zircophyllite - the zirconium analogue of astrophyllite, Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 101, 459-463 (in Russian). English translation: International Geology Review 15 (1973), 621-625. Abstracted in
American Mineralogist (1973): 58: 967.
PIILONEN, P.C., LALONDE, A.E., MCDONALD, A.M., GAULT, R.A. & LARSEN, A.O. (2003a) Insights into astrophyllite group minerals. I, nomenclature, composition and development of standardized general formula. Canadian Mineralogist 41, 1-26.
PIILONEN, P.C., MCDONALD, A.M. & LALONDE, A.E. (2003b): Insights into astrophyllite group minerals. II, crystal chemistry. Canadian Mineralogist 41, 27-54.
SOKOLOVA, E. & HAWTHORNE, F.C. (2016): The crystal structure of zircophyllite, K2NaFe2+7Zr2(Si4O12)2O2(OH)4F, an astrophyllite-supergroup mineral from Mont Saint-Hilaire, Québec, Canada. Canadian Mineralogist 54, 1539-1547.

Internet Links for Zircophyllite

mindat.org URL:
https://www.mindat.org/min-4423.html
Please feel free to link to this page.

Localities for Zircophyllite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
PIILONEN, P.C. (2001) Crystal chemistry, Mössbauer spectroscopy and paragenesis of astrophyllite group minerals from over and undersaturated alkaline rocks. Unpublished Ph. D. Thesis, Ottawa-Carleton Geoscience Centre, University of Ottawa, Canada. 523 p.
Portugal
 
  • Azores District
    • São Miguel Island
      • Água de Pau Massif
Russia (TL)
 
  • Eastern-Siberian Region
    • Tuva Republic
      • Sangilen Upland
ZVMO,(1972) 101, 459-463; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
South Africa
 
  • North West Province
    • Bojanala Platinum District
      • Western Bushveld Complex
R. Liferovich - L. Horváth p.c. (2004)
USA
 
  • Arkansas
    • Hot Spring Co.
      • Magnet Cove
H. Barwood - unpublished (2010)
    • Pulaski Co.
      • Little Rock
        • Granite Mountain area
Henry Barwood - unpublished (2010)
Mineral and/or Locality  
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