Fluorapophyllite-(Na)
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Fluorapophyllite-(Na)
Formula:
NaCa4(Si8O20)F · 8H2O
Colour:
Brownish-yellow, yellowish-brown, colourless
Lustre:
Vitreous, Pearly
Hardness:
4 - 5
Specific Gravity:
2.50
Crystal System:
Orthorhombic
Member of:
Name:
From the Greek for "away from" (ἀπό, apo) and "leaf" (φύλλον, phyllos), in allusion to the way it exfoliates upon heating. The "-(NaF)" suffix documents the dominant and distinctive components in this member of the Apophyllite family (sodium and fluoride).
The mineral name changed from apophyllite-(NaF) to fluorapophyllite-(Na) (Hatert et al. 2013)
The mineral name changed from apophyllite-(NaF) to fluorapophyllite-(Na) (Hatert et al. 2013)
This page provides mineralogical data about Fluorapophyllite-(Na).
Unique Identifiers
Mindat ID:
2851
Long-form identifier:
mindat:1:1:2851:2
IMA Classification of Fluorapophyllite-(Na)
Approved
IMA Formula:
NaCa4Si8O20F · 8H2O
Approval year:
1976
Classification of Fluorapophyllite-(Na)
9.EA.15
9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
72.3.1.3
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
3 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
3 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
17.1.4
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 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.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Fapo-Na | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Fapo | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Fluorapophyllite-(Na)
Vitreous, Pearly
Colour:
Brownish-yellow, yellowish-brown, colourless
Streak:
Light gray
Hardness:
4 - 5 on Mohs scale
Cleavage:
Perfect
perfect on {001} and poor on {110}
perfect on {001} and poor on {110}
Density:
2.50 g/cm3 (Measured) 2.30 g/cm3 (Calculated)
Optical Data of Fluorapophyllite-(Na)
Type:
Biaxial (+)
RI values:
nα = 1.536 nβ = 1.538 nγ = 1.544
2V:
Measured: 32° , Calculated: 62°
Max. Birefringence:
δ = 0.008
Based on recorded range of RI values above.
Based on recorded range of RI values above.
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.
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.
Surface Relief:
Moderate
Dispersion:
r < v strong
Chemistry of Fluorapophyllite-(Na)
Mindat Formula:
NaCa4(Si8O20)F · 8H2O
Element Weights:
Common Impurities:
K
Crystallography of Fluorapophyllite-(Na)
Crystal System:
Orthorhombic
Cell Parameters:
a = 8.875(4) Å, b = 8.881(6) Å, c = 15.79(1) Å
Ratio:
a:b:c = 0.999 : 1 : 1.778
Unit Cell V:
1,244.55 ų (Calculated from Unit Cell)
Z:
2
Comment:
space group : Pnnm or Pnn2
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0000830 | Fluorapophyllite-(Na) | Miura Y, Kato T, Rucklidge J C, Matsueda H (1981) Natroapophyllite, a new orthorhombic sodium analog of apophyllite II. Crystal structure American Mineralogist 66 410-423 |  | 1981 | the Sampo mine, Okayama, Japan | 0 | 293 |
CIF Raw Data - click here to close
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4a: Earth’s earliest continental crust | >4.4-3.0 |
| 19 : Granitic intrusive rocks | |
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Fluorapophyllite-(Na)
Associated Minerals at Type Locality:
Synonyms of Fluorapophyllite-(Na)
Other Language Names for Fluorapophyllite-(Na)
Dutch:Fluorapophylliet-(Na)
Japanese:ソーダ魚眼石
Russian:Апофиллит-(NaF)
Simplified Chinese:钠鱼眼石
Spanish:Natroapofilita
Traditional Chinese:鈉魚眼石
Relationship of Fluorapophyllite-(Na) to other Species
Member of:
Other Members of Apophyllite Group:
| Fluorapophyllite-(Cs) | CsCa4(Si8O20)F · 8H2O | Tet. |
| Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/mnc |
| Fluorapophyllite-(NH4) | NH4Ca4(Si8O20)F · 8H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/mnc |
| Hydroxyapophyllite-(K) | KCa4(Si8O20)(OH,F) · 8H2O | Tet. 4/mmm (4/m 2/m 2/m) |
| Hydroxymcglassonite-(K) | KSr4Si8O20(OH) · 8H2O | Tet. |
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Fluorapophyllite-(Na) associated with Hubeite | Ca2Mn2+Fe3+Si4O12(OH) · 2H2O |
| 2 photos of Fluorapophyllite-(Na) associated with Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| 2 photos of Fluorapophyllite-(Na) associated with Analcime | Na(AlSi2O6) · H2O |
| 1 photo of Fluorapophyllite-(Na) associated with Wollastonite | Ca3(Si3O9) |
| 1 photo of Fluorapophyllite-(Na) associated with Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| 1 photo of Fluorapophyllite-(Na) associated with Scolecite | CaAl2Si3O10 · 3H2O |
Related Minerals - Strunz-mindat Grouping
| 9.EA. | Hydroxymcglassonite-(K) | KSr4Si8O20(OH) · 8H2O |
| 9.EA. | Miyawakiite-(Y) | ◻Y4Fe2(Si8O20)(CO3)4(H2O)3 |
| 9.EA. | Bussyite-(Y) | (Y,REE,Ca)3(Na,Ca)6MnSi9Be5(O,OH,F)34 |
| 9.EA. | Fluorapophyllite-(NH4) | NH4Ca4(Si8O20)F · 8H2O |
| 9.EA.05 | Gillespite | BaFe2+Si4O10 |
| 9.EA.05 | Cuprorivaite | CaCuSi4O10 |
| 9.EA.05 | Wesselsite | SrCuSi4O10 |
| 9.EA.05 | Effenbergerite | BaCuSi4O10 |
| 9.EA.07 | Fluorapophyllite-(Cs) | CsCa4(Si8O20)F · 8H2O |
| 9.EA.10 | Ekanite | Ca2ThSi8O20 |
| 9.EA.15 | Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O |
| 9.EA.15 | Hydroxyapophyllite-(K) | KCa4(Si8O20)(OH,F) · 8H2O |
| 9.EA.20 | Magadiite | Na2Si14O29 · 11H2O |
| 9.EA.25 | Dalyite | K2ZrSi6O15 |
| 9.EA.25 | Davanite | K2TiSi6O15 |
| 9.EA.30 | Sazhinite-(La) | Na3La[Si6O15] · 2H2O |
| 9.EA.30 | Sazhinite-(Ce) | Na3CeSi6O15 · 2H2O |
| 9.EA.35 | Armstrongite | CaZr[Si6O15] · 3H2O |
| 9.EA.40 | Okenite | Ca10Si18O46 · 18H2O |
| 9.EA.45 | Perettiite-(Y) | Y2Mn4FeSi2B8O24 |
| 9.EA.45 | Nekoite | Ca3Si6O15 · 7H2O |
| 9.EA.45 | Badakhshanite-(Y) | Y2Mn4Al(Si2B7BeO24) |
| 9.EA.47 | Shlykovite | KCa[Si4O9(OH)] · 3H2O |
| 9.EA.50 | Diegogattaite | Na2CaCu2Si8O20 · H2O |
| 9.EA.50 | Cavansite | Ca(VO)Si4O10 · 4H2O |
| 9.EA.52 | Yangite | PbMnSi3O8 · H2O |
| 9.EA.55 | Pentagonite | Ca(VO)Si4O10 · 4H2O |
| 9.EA.60 | Penkvilksite | Na4Ti2Si8O22 · 4H2O |
| 9.EA.60 | Tumchaite | Na2Zr(Si4O11) · 2H2O |
| 9.EA.65 | Nabesite | Na2BeSi4O10 · 4H2O |
| 9.EA.70 | Ajoite | (K,Na)Cu7AlSi9O24(OH)6 · 3H2O |
| 9.EA.75 | Zeravshanite | Na2Cs4Zr3[Si18O45]*2H2O |
| 9.EA.80 | Bussyite-(Ce) | (Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4 |
| 9.EA.85 | Plumbophyllite | Pb2Si4O10 · H2O |
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 Fluorapophyllite-(Na)
mindat.org URL:
https://www.mindat.org/min-2851.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Fluorapophyllite-(Na)
Localities for Fluorapophyllite-(Na)
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Bottrill et al. (2008) |
Canada | |
| Pe-Piper (2000) |
China | |
| Hawthorne et al. (2002) |
Finland | |
| Hietala |
Italy | |
| Simone Citon collection |
Japan (TL) | |
| Matsueda et al. (1981) |
Namibia | |
| Warta et al. (2006) |
UK | |
| www.excaliburmineral.com |
USA | |
| Castor et al. (2004) |
| Castor et al. (2004) |
| John Cianciulli |
| EDS by Joy Desor showed essentially no ... | |
|
Quick NavTopAbout Fluorapophyllite-(Na)Unique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Aris Quarries, Aris, Windhoek Rural, Khomas Region, Namibia