Zircophyllite
A valid IMA mineral species
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About Zircophyllite
Formula:
K2NaFe2+7Zr2(Si4O12)2O2(OH)4F
Colour:
Black-brown
Lustre:
Adamantine, Vitreous
Hardness:
4 - 4½
Specific Gravity:
3.34
Crystal System:
Triclinic
Member of:
Name:
Named after its chemical composition containing zirconium and analogy to astrophyllite (Greek ÏÏÎ»Î»ÎżÎœ (fyllon), 'leaf', alluding to its micaceous habit).
Unique Identifiers
Mindat ID:
4423
Long-form identifier:
mindat:1:1:4423:9
GUID
(UUID V4):
(UUID V4):
e43c0855-5d8a-4a5c-839c-61c0a9e32eab
IMA Classification of Zircophyllite
Approved
Approval year:
1971
Approval history:
Approved by IMA in 1971.
Redefined by IMA 2017 (proposal 17-D) as an astrophyllite-group mineral.
Redefined by IMA 2017 (proposal 17-D) as an astrophyllite-group mineral.
Classification of Zircophyllite
9.DC.05
9 : SILICATES (Germanates)
D : Inosilicates
C : Inosilicates with branched 2-periodic single chains; Si2O6 + 2SiO3 Si4O12
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)
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)
17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Zcp | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Zcp | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261â264 doi:10.1180/clm.2020.30 |
Physical Properties of Zircophyllite
Adamantine, Vitreous
Transparency:
Translucent
Colour:
Black-brown
Streak:
Light brown
Hardness:
4 - 4½ on Mohs scale
Tenacity:
Very brittle
Cleavage:
Perfect
{001}
{001}
Density:
3.34 g/cm3 (Measured)
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.
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 Zircophyllite
Mindat Formula:
K2NaFe2+7Zr2(Si4O12)2O2(OH)4F
Common Impurities:
Ti,Hf,H2O
Crystallography of Zircophyllite
Crystal System:
Triclinic
Comment:
Point Group: n.d.; Space Group: n.d. Z = n.d.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.50 Ă | (10) |
2.80 Ă | (7) |
2.66 Ă | (5) |
2.10 Ă | (5) |
9.80 Ă | (4) |
3.75 Ă | (3) |
3.26 Ă | (3) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Zircophyllite
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 Zircophyllite
Other Language Names for Zircophyllite
German:Zirkophyllit
Spanish:Zircophyllita
Relationship of Zircophyllite to other Species
Member of:
Other Members of this group:
Astrophyllite | K2NaFe2+7Ti2Si8O26(OH)4F | Tric. 1 : P1 |
Bulgakite | Li2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(F,O)(H2O)2 | Tric. 1 : P1 |
Hydroastrophyllite | (H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31 | Tric. |
Nalivkinite | Li2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4F | Tric. 1 : P1 |
Niobophyllite | (K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31 | Tric. |
Tarbagataite | (Kâ»)Ca(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)5 | Tric. 1 : P1 |
Related Minerals - Strunz-mindat Grouping
9.DC. | Bulgakite | Li2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(F,O)(H2O)2 |
9.DC.05 | Astrophyllite | K2NaFe2+7Ti2Si8O26(OH)4F |
9.DC.05 | Hydroastrophyllite | (H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31 |
9.DC.05 | Kupletskite | (K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4F |
9.DC.05 | Lobanovite | K2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4 |
9.DC.05 | Niobophyllite | (K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31 |
9.DC.05 | Kupletskite-(Cs) | Cs2NaMn2+7Ti2(Si4O12)2O2(OH)4F |
9.DC.05 | Niobokupletskite | K2NaMn2+7(Nb,Ti)(Si4O12)2O2(OH)4(O,F) |
9.DC.05 | Nalivkinite | Li2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4F |
9.DC.05 | Devitoite | [Ba6(PO4)2(CO3)][Fe2+7(OH)4Fe3+2O2(Si4O12)2] |
9.DC.05 | Sveinbergeite | Ca(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4 |
9.DC.05 | Tarbagataite | (Kâ»)Ca(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)5 |
9.DC.05 | Heyerdahlite | Na3Mn7Ti2(Si4O12)2O2(OH)4F(H2O)2 |
9.DC.05 | Laverovite | K2NaMn7Zr2(Si4O12)2O2(OH)4F |
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.
Internet Links for Zircophyllite
mindat.org URL:
https://www.mindat.org/min-4423.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Zircophyllite
Reference List:
Piilonen, P. C., Lalonde, A. E., McDonald, A. M., Gault, R. A., Larsen, A. O. (2003) Insights into Astrophyllite-group minerals. I. Nomenclature, composition and development of standardized general formula. The Canadian Mineralogist, 41 (1) 1-26 doi:10.2113/gscanmin.41.1.1
Piilonen, P. C., McDonald, A. M., Lalonde, A. E. (2003) Insights into astrophyllite- group minerals. II. Crystal chemistry. The Canadian Mineralogist, 41 (1) 27-54 doi:10.2113/gscanmin.41.1.27
Sokolova, Elena, Hawthorne, Frank C. (2016) The crystal structure of zircophyllite, K2NaFe2+7Zr2(Si4O12)2O2(OH)4F, an astrophyllite-supergroup mineral from Mont Saint-Hilaire, Québec, Canada. The Canadian Mineralogist, 54 (6) 1539-1547 doi:10.3749/canmin.1600034
Sokolova, Elena, CĂĄmara, Fernando, Hawthorne, Frank C., Ciriotti, Marco E. (2018) Redefinition of zircophyllite, ideally K2NaMn7Zr2(Si4O12)2O2(OH)4F, a kupletskite-group mineral of the astrophyllite supergroup (in accord with IMA 15-B) as an astrophyllite-group mineral, ideally K2NaFe2+7Zr2(Si4O12)2O2(OH)4F (IMA 17-D) The Canadian Mineralogist, 56 (1) 3-5 doi:10.3749/canmin.1700062
Localities for Zircophyllite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
All localities listed without proper references should be considered as questionable.
Canada | |
| Sokolova et al. (2018) |
Portugal | |
| |
Russia (TL) | |
| ZVMO (1972) +1 other reference |
South Africa | |
| R. Liferovich -L. HorvĂĄth p.c. 2004 |
USA | |
| H. Barwood - unpublished (2010) |
| Henry Barwood - unpublished (2010) |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada