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Fluorapophyllite-(Na)

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Formula:
NaCa4Si8O20F · 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
Approval Year:
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)

Type Occurrence of Fluorapophyllite-(Na)

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:
NaCa4Si8O20F · 8H2O
Elements listed in formula:
Common Impurities:
K

Relationship of Fluorapophyllite-(Na) to other Species

9.EA.05CuprorivaiteCaCuSi4O10
9.EA.05GillespiteBaFe2+Si4O10
9.EA.05EffenbergeriteBaCuSi4O10
9.EA.05WesselsiteSrCuSi4O10
9.EA.10EkaniteCa2ThSi8O20
9.EA.15Fluorapophyllite-(K)KCa4Si8O20F · 8H2O
9.EA.15Hydroxyapophyllite-(K)KCa4Si8O20(OH,F) · 8H2O
9.EA.20MagadiiteNa2Si14O29 · 11H2O
9.EA.25DalyiteK2ZrSi6O15
9.EA.25DavaniteK2TiSi6O15
9.EA.30Sazhinite-(Ce)Na3CeSi6O15 · 2H2O
9.EA.30Sazhinite-(La)Na3LaSi6O15 · 2H2O
9.EA.35ArmstrongiteCaZrSi6O15 · 2H2O
9.EA.40OkeniteCa10Si18O46 · 18H2O
9.EA.45NekoiteCa3Si6O15 · 7H2O
9.EA.50CavansiteCaV4+OSi4O10 · 4H2O
9.EA.55PentagoniteCaV4+OSi4O10 · 4H2O
9.EA.60PenkvilksiteNa4Ti2Si8O22 · 4H2O
9.EA.60TumchaiteNa2ZrSi4O11 · 2H2O
9.EA.65NabesiteNa2BeSi4O10 · 4H2O
9.EA.70AjoiteK3Cu202+Al3Si29O76(OH)16 · 8H2O
9.EA.75ZeravshaniteNa2Cs4Zr3Si18O45 · 2H2O
9.EA.80Bussyite-(Ce)(Na,H2O)6(Ce,REE)3Be5MnSi9(O,OH)30F4
9.EA.85PlumbophyllitePb2Si4O10 · H2O
17.1.1HectoriteNa0.3(Mg,Li)3Si4O10(F,OH)2 · nH2O
17.1.3AgrelliteNaCa2Si4O10F
17.1.5Fluorapophyllite-(K)KCa4Si8O20F · 8H2O
17.1.6Hydroxyapophyllite-(K)KCa4Si8O20(OH,F) · 8H2O
17.1.7HsianghualiteLi2Ca3Be3(SiO4)3F2
17.1.8LeucophaniteNaCaBeSi2O6F
17.1.9NorbergiteMg3SiO4F2
17.1.10ChondroditeMg5(SiO4)2F2
17.1.11HumiteMg7(SiO4)3(F,OH)2
17.1.12ClinohumiteMg9(SiO4)4F2
17.1.13CanasiteK3Na3Ca5Si12O30(OH)4
17.1.14Charoite(K,Sr,Ba,Mn)15-16(Ca,Na)32Si70(O,OH)180(OH,F)4 · nH2O
17.1.15CuspidineCa4(Si2O7)F2
17.1.16BultfonteiniteCa2[SiO3(OH)]F · H2O
17.1.17ZeophylliteCa13Si10O28(OH)2F8 · 6H2O
17.1.18Rowlandite-(Y)Fe2+Y4(Si2O7)2F2
17.1.19YuksporiteK4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3
17.1.20Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
17.1.21Mosandrite-(Ce)(Ca,Ce)4(◻,Ca,Na)3Ti(Si2O7)2(H2O,OH,F)4 · H2O
17.1.22Hiortdahlite(Na,Ca)2Ca4Zr(Mn,Ti,Fe)(Si2O7)2(F,O)4
17.1.23BurpaliteNa2CaZr(Si2O7)F2
17.1.24Seidozerite(Na,Ca)4Mn(Ti,Zr)2(Si2O7)2(O,F,OH)4
17.1.25Thorosteenstrupine(Ca,Th,Mn)3Si4O11F · 6H2O
17.1.26ZircophylliteK2NaMn72+Zr2(Si4O12)2O2(OH)4F
17.1.27JinshajiangiteNaBaFe42+Ti2(Si2O7)2O2(OH)2F
17.1.28RosenbuschiteNa2(Na,Ca)4Ca6Zr3Ti(Si2O7)4O4F4
17.1.29NarsarsukiteNa2(Ti,Fe3+)Si4(O,F)11
17.1.30SonoliteMn92+(SiO4)4(OH)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)

mindat.org URL:
http://www.mindat.org/min-2851.html
Please feel free to link to this page.

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
Canadian Mineralogist 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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