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Fluorapophyllite-(Na)

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Formula:
NaCa4(Si8O20)F · 8H2O
System:
Orthorhombic
Colour:
Brownish-yellow, ...
Lustre:
Vitreous
Hardness:
4 - 5
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)
This page provides mineralogical data about Fluorapophyllite-(Na).

Classification of Fluorapophyllite-(Na)

Approved 1976
9.EA.15

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
17.1.4

17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)
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http://www.mindat.org/min-2851.html
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Type Occurrence of Fluorapophyllite-(Na)

Year of Discovery:
1976

Physical Properties of Fluorapophyllite-(Na)

Vitreous
Colour:
Brownish-yellow, yellowish-brown, colourless
Hardness (Mohs):
4 - 5

Crystallography of Fluorapophyllite-(Na)

Crystal System:
Orthorhombic
Cell Parameters:
a = 8.87Å, b = 8.88Å, c = 15.79Å
Ratio:
a:b:c = 0.999 : 1 : 1.778
Unit Cell Volume:
V 1,243.71 ų (Calculated from Unit Cell)

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
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r < v strong

Chemical Properties of Fluorapophyllite-(Na)

Formula:
NaCa4(Si8O20)F · 8H2O
Essential elements:
All elements listed in formula:
Common Impurities:
K

Relationship of Fluorapophyllite-(Na) to other Species

9.EA.05CuprorivaiteCaCu[Si4O10]
9.EA.05GillespiteBaFe2+[Si4O10]
9.EA.05EffenbergeriteBaCu[Si4O10]
9.EA.05WesselsiteSrCu[Si4O10]
9.EA.10Ekanite(Ca,Fe2+,Pb)2(Th,U)[Si8O20]
9.EA.15Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
9.EA.15Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
9.EA.20MagadiiteNa2Si14O29 · 11H2O
9.EA.25DalyiteK2ZrSi6O15
9.EA.25DavaniteK2TiSi6O15
9.EA.30Sazhinite-(Ce)Na3Ce[Si6O15] · 6H2O
9.EA.30Sazhinite-(La)Na3La[Si6O15] · 2H2O
9.EA.35ArmstrongiteCaZr[Si6O15] · 3H2O
9.EA.40OkeniteCa10Si18O46 · 18H2O
9.EA.45NekoiteCa3Si6O15·7H2O
9.EA.50CavansiteCa(VO)Si4O10 · 4H2O
9.EA.55PentagoniteCa(VO)Si4O10 · 4H2O
9.EA.60PenkvilksiteNa4Ti2Si8O22 · 4H2O
9.EA.60TumchaiteNa2Zr(Si4O11) · 2H2O
9.EA.65NabesiteNa2BeSi4O10 · 4H2O
9.EA.70Ajoite(K,Na)Cu7AlSi9O24(OH)6 · 3H2O
9.EA.75ZeravshaniteNa2Cs4Zr3[Si18O45]*2H2O
9.EA.80Bussyite-(Ce)(Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4
9.EA.85PlumbophyllitePb2Si4O10 · H2O
17.1.1HectoriteNa0.3(Mg,Li)3(Si4O10)(F,OH)2
17.1.3AgrelliteNaCa2Si4O10F
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
17.1.13CanasiteK2Na4Ca5(Si12O30(OH,F)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
17.1.17ZeophylliteCa13(Si10O28)F10 · 6H2O
17.1.18Rowlandite-(Y)(Y,Ce)4Fe2+(Si2O7)2F2 (?)
17.1.19Yuksporite(K,Ba)NaCa2(Si,Ti)4O11(F,OH) · H2O
17.1.20Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
17.1.21Mosandrite(◻,Ca,Na)3(Ca,REE)4Ti(Si2O7)2[H2O,OH,F]4 · H2O
17.1.22Hiortdahlite(Ca,Na)3(Zr,Ti)(Si2O7)(O,OH,F)2
17.1.23BurpaliteNa2CaZr(Si2O7)F2
17.1.24SeidozeriteNa8Mn22+Zr3Ti3(Si2O7)4O4F4
17.1.25ThorosteenstrupineCaMnThSi4O11(OH)F · 6H2O
17.1.26Zircophyllite(K,Na)3(Mn,Fe2+)7(Zr,Ti)2Si8O24(O,OH,F)7
17.1.27JinshajiangiteBaNaFe42+Ti2(Si2O7)2O2(OH)2F
17.1.28Rosenbuschite(Ca,Na)3(Zr,Ti)(Si2O7)OF
17.1.29NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2
17.1.30SonoliteMn92+(SiO4)4(OH,F)2

Other Names for Fluorapophyllite-(Na)

Name in Other Languages:
Simplified Chinese:钠鱼眼石
Traditional Chinese:鈉魚眼石

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 Fluorapophyllite-(Na)

Reference List:
American Mineralogist (1981): 66: 416-423.

HATERT, F., MILLS, S.J., PASERO, M. and WILLIAMS, P.A. (2013) CNMNC guidelines for the use of suffixes and prefixes in mineral nomenclature, and for the preservation of historical names. European Journal of Mineralogy 25, 113-115.

Internet Links for Fluorapophyllite-(Na)

Localities for Fluorapophyllite-(Na)

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.
Australia
 
  • Tasmania
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
Canada
 
  • Nova Scotia
    • Kings Co.
      • Bay of Fundy
Can. Min. 38, 1215
China
 
  • Hubei Province
    • Huangshi Prefecture
      • Daye Co.
Min Rec 33(2002), 465–471
Finland
 
  • Southwestern Finland Region
    • Laitila
Hietala, Satu 2013. Uusi korukivilöytö Laitilasta. Mineralia 2/2013, 24-29
Japan (TL)
 
  • Honshu Island
    • Chugoku Region
      • Okayama Prefecture
        • Takahashi City
          • Bicchu-cho (Bitchu-cho)
            • Shitouyouze
Amer. Min.(1981) 66, 410-423
Namibia
 
  • Khomas Region
    • Windhoek District
      • Aris
[http://www.koeln.netsurf.de/~w.steffens/aris.htm]; Wartha, R., Palfi, A., Niedermayr, G., Brandstätter, F. and Petersen, O. V. (2006): Der Aris-Phonolith-Komplex und seine Mineralien. In: Jahn, S., Medenbach, O., Niedermayr, G. & Schneider, G., Eds. (2006): Namibia – Zauberwelt edler Steine und Kristalle. 2nd ed., Bode-Verlag, Haltern, Germany, pp. 228-239 (in German).
UK
 
  • Northern Ireland
    • Co. Antrim
      • Glengormley
www.excaliburmineral.com
USA
 
  • Nevada
    • Eureka Co.
      • Lynn District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Humboldt Co.
      • Osgood Mts
        • Potosi District
          • Adam Peak
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
          • Franklin Mine
D. Steven Kuitems specimen
  • Oregon
    • Benton Co.
      • Coffin Butte
No reference Listed
Mineral and/or Locality  
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