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Zircophyllite

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Formula:
K2NaFe2+7Zr2(Si4O12)2O2(OH)4F
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).
Astrophyllite Group.

The currently accepted formula is K2NaFe2+7Zr2(Si4O12)2O2(OH)4F.


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Classification of ZircophylliteHide

Approved
Approval Year:
1971
Approval History:
Approved by IMA in 1971.
Redefined by IMA 2017 (proposal 17-D) as an astrophyllite-group mineral.
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 ZircophylliteHide

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

Optical Data of ZircophylliteHide

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 ZircophylliteHide

Formula:
K2NaFe2+7Zr2(Si4O12)2O2(OH)4F
IMA Formula:
K2NaMn2+7Zr2(Si4O12)2O2(OH)4F
Common Impurities:
Ti,Hf,H2O

Crystallography of ZircophylliteHide

Crystal System:
Triclinic

Type Occurrence of ZircophylliteHide

Synonyms of ZircophylliteHide

Other Language Names for ZircophylliteHide

Relationship of Zircophyllite to other SpeciesHide

Other Members of this group:
AstrophylliteK2NaFe2+7Ti2Si8O28(OH)4FTric. 1 : P1
BulgakiteLi2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(F,O)(H2O)2Tric. 1 : P1
Hydroastrophyllite(H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31Tric.
NalivkiniteLi2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4FTric. 1 : P1
Niobophyllite(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31Tric.
Tarbagataite(K□)Ca(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)5 Tric. 1 : P1

Related Minerals - Nickel-Strunz GroupingHide

9.DC.05AstrophylliteK2NaFe2+7Ti2Si8O28(OH)4FTric. 1 : P1
9.DC.05Hydroastrophyllite(H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31Tric.
9.DC.05Kupletskite(K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4FTric.
9.DC.05LobanoviteK2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4Mon. 2/m : B2/m
9.DC.05Niobophyllite(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31Tric.
9.DC.05Kupletskite-(Cs)Cs2NaMn2+7Ti2(Si4O12)2O2(OH)4FTric.
9.DC.05NiobokupletskiteK2NaMn2+7(Nb,Ti)(Si4O12)2O2(OH)4(O,F)Tric. 1 : P1
9.DC.05NalivkiniteLi2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4FTric. 1 : P1
9.DC.05SveinbergeiteCa(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4Tric. 1 : P1

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

69.1.1.1AstrophylliteK2NaFe2+7Ti2Si8O28(OH)4FTric. 1 : P1
69.1.1.2Kupletskite(K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4FTric.
69.1.1.3Kupletskite-(Cs)Cs2NaMn2+7Ti2(Si4O12)2O2(OH)4FTric.
69.1.1.4Niobophyllite(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31Tric.
69.1.1.5NalivkiniteLi2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4FTric. 1 : P1
69.1.1.6Hydroastrophyllite(H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31Tric.
69.1.1.6SveinbergeiteCa(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4Tric. 1 : P1
69.1.1.7LobanoviteK2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4Mon. 2/m : B2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.1.1HectoriteNa0.3(Mg,Li)3(Si4O10)(F,OH)2Mon.
17.1.3AgrelliteNaCa2Si4O10FTric.
17.1.4Fluorapophyllite-(Na)NaCa4(Si8O20)F · 8H2OOrth.
17.1.5Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mnc
17.1.6Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2OTet.
17.1.7HsianghualiteCa3Li2(Be3Si3O12)F2
17.1.8LeucophaniteNaCaBeSi2O6FOrth. 2 2 2 : P21 21 21
17.1.9NorbergiteMg3(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
17.1.10Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2Mon. 2/m : P21/b
17.1.11Humite(Mg,Fe2+)7(SiO4)3(F,OH)2Orth. mmm (2/m 2/m 2/m)
17.1.12ClinohumiteMg9(SiO4)4F2Mon. 2/m : P21/b
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 · ~3H2OMon. 2/m : P21/m
17.1.15CuspidineCa4(Si2O7)(F,OH)2Mon. 2/m : P21/b
17.1.16BultfonteiniteCa2(HSiO4)F · H2OTric.
17.1.17ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig. 3 : R3
17.1.18Rowlandite-(Y)(Y,Ce)4Fe2+(Si2O7)2F2 (?)Tric.
17.1.19YuksporiteK4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3Orth.
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)2Mon. 2/m : P21/b
17.1.22Hiortdahlite(Na,Ca)2Ca4Zr(Mn,Ti,Fe)(Si2O7)2(F,O)4 Tric.
17.1.23BurpaliteNa2CaZr(Si2O7)F2Mon.
17.1.24SeidozeriteNa4MnZr2Ti(Si2O7)2O2F2Mon.
17.1.25Thorosteenstrupine(Ca,Th,Mn)3Si4O11F · 6H2O
17.1.27JinshajiangiteBaNaFe2+4Ti2(Si2O7)2O2(OH)2FMon. 2/m
17.1.28RosenbuschiteNa6Ca6Zr3Ti(Si2O7)4O2F6Tric. 1 : P1
17.1.29NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2Tet.
17.1.30SonoliteMn2+9(SiO4)4(OH)2Mon.

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 ZircophylliteHide

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 ZircophylliteHide

Localities for ZircophylliteHide

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.
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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