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Zircophyllite

A valid IMA mineral species
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About ZircophylliteHide

Formula:
K2NaFe2+7Zr2(Si4O12)2O2(OH)4F
Colour:
Black-brown
Lustre:
Adamantine, Vitreous
Hardness:
4 - 4½
Specific Gravity:
3.34
Crystal System:
Triclinic
Name:
Named after its chemical composition containing zirconium and analogy to astrophyllite (Greek Ï†ÏÎ»Î»ÎżÎœ (fyllon), 'leaf', alluding to its micaceous habit).
Astrophyllite Group.

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


Unique IdentifiersHide

Mindat ID:
4423
Long-form identifier:
mindat:1:1:4423:9
GUID
(UUID V4):
e43c0855-5d8a-4a5c-839c-61c0a9e32eab

IMA 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.

Classification of ZircophylliteHide

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)

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
ZcpIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
ZcpWarr (2020)Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30

Physical Properties of ZircophylliteHide

Adamantine, Vitreous
Transparency:
Translucent
Colour:
Black-brown
Streak:
Light brown
Hardness:
4 - 4½ on Mohs scale
Tenacity:
Very brittle
Cleavage:
Perfect
{001}
Density:
3.34 g/cm3 (Measured)    

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
Pleochroism:
Visible
Comments:
X = Y = dark yellow; Z = brown

Chemistry of ZircophylliteHide

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

Crystallography of ZircophylliteHide

Crystal System:
Triclinic
Comment:
Point Group: n.d.; Space Group: n.d. Z = n.d.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.50 Å(10)
2.80 Å(7)
2.66 Å(5)
2.10 Å(5)
9.80 Å(4)
3.75 Å(3)
3.26 Å(3)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of ZircophylliteHide

General Appearance of Type Material:
Platy micaceous crystals, to 2 cm.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.
Associated Minerals at Type Locality:
Reference:
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

Synonyms of ZircophylliteHide

Other Language Names for ZircophylliteHide

Relationship of Zircophyllite to other SpeciesHide

Other Members of this group:
AstrophylliteK2NaFe2+7Ti2Si8O26(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 - Strunz-mindat GroupingHide

9.DC.BulgakiteLi2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(F,O)(H2O)2Tric. 1 : P1
9.DC.05AstrophylliteK2NaFe2+7Ti2Si8O26(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. 1 : P1
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.05Devitoite[Ba6(PO4)2(CO3)][Fe2+7(OH)4Fe3+2O2(Si4O12)2]Tric. 1 : P1
9.DC.05SveinbergeiteCa(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4Tric. 1 : P1
9.DC.05Tarbagataite(K◻)Ca(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)5 Tric. 1 : P1
9.DC.05HeyerdahliteNa3Mn7Ti2(Si4O12)2O2(OH)4F(H2O)2Tric. 1 : P1
9.DC.05Laverovite K2NaMn7Zr2(Si4O12)2O2(OH)4FTric. 1 : P1

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 ZircophylliteHide

References for ZircophylliteHide

Reference List:

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 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.
Canada
 
  • QuĂ©bec
    • MontĂ©rĂ©gie
      • La VallĂ©e-du-Richelieu RCM
        • Mont Saint-Hilaire
Sokolova et al. (2018)
Portugal
 
  • Azores
    • SĂŁo Miguel
Russia (TL)
 
  • Tuva
    • Sangilen Upland
ZVMO (1972) +1 other reference
South Africa
 
  • North West
    • Bojanala Platinum District Municipality
      • Moses Kotane Local Municipality
R. Liferovich -L. HorvĂĄth p.c. 2004
USA
 
  • Arkansas
    • Hot Spring County
      • Magnet Cove
H. Barwood - unpublished (2010)
    • Pulaski County
      • Little Rock
        • Granite Mountain area
Henry Barwood - unpublished (2010)
 
and/or  
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