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Apophyllite-(NaF)

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Valley Landfill Pit (S2F quarry), Coffin Butte, Benton Co., Oregon, USA
© Karl Volkman

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Formula:
NaCa
 
4
(Si
 
8
O
 
20
)F · 8H
 
2
O
System:OrthorhombicColour:Brownish-yellow, ...
Lustre:VitreousHardness: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).
This page provides mineralogical data about Apophyllite-(NaF).

Classification of Apophyllite-(NaF)

IMA status:Approved 1976
Strunz 8th edition ID:8/H.01-10
Nickel-Strunz 10th (pending) edition ID:9.EA.15

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
Dana 8th edition ID: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
Hey's CIM Ref.:17.1.4

17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)
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Type Occurrence of Apophyllite-(NaF)

Type Locality:Sampo mine, Takahashi City, Okayama Prefecture, Chugoku Region, Honshu Island, Japan
Year of Discovery:1981

Physical Properties of Apophyllite-(NaF)

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

Crystallography of Apophyllite-(NaF)

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 Apophyllite-(NaF)

Type:Biaxial (+)
RI values: nα = 1.536 nβ = 1.538 nγ = 1.544
2V:Measured: 32° , Calculated: 62°
Maximum Birefringence:δ = 0.008

Chart 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 Apophyllite-(NaF)

Formula:
NaCa
 
4
(Si
 
8
O
 
20
)F · 8H
 
2
O
Essential elements:Ca, F, H, Na, O, Si
All elements listed in formula:Ca, F, H, Na, O, Si
Common Impurities:K

Relationship of Apophyllite-(NaF) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EA.05Cuprorivaite
CaCu[Si
 
4
O
 
10
]
9.EA.05Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
9.EA.05Effenbergerite
BaCu[Si
 
4
O
 
10
]
9.EA.05Wesselsite
SrCu[Si
 
4
O
 
10
]
9.EA.10Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.EA.15Apophyllite-(KF)
KCa
 
4
(Si
 
8
O
 
20
)(F,OH) · 8H
 
2
O
9.EA.15Apophyllite-(KOH)
KCa
 
4
(Si
 
8
O
 
20
)(OH,F) · 8H
 
2
O
9.EA.20Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
 · 3H
 
2
O
9.EA.25Dalyite
K
 
2
ZrSi
 
6
O
 
15
9.EA.25Davanite
K
 
2
TiSi
 
6
O
 
15
9.EA.30Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
9.EA.30Sazhinite-(La)
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
9.EA.35Armstrongite
CaZr[Si
 
6
O
 
15
] · 3H
 
2
O
9.EA.40Okenite
CaSi
 
2
O
 
5
 · 2H
 
2
O
9.EA.45Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
9.EA.50Cavansite
Ca(VO)Si
 
4
O
 
10
 · 4H
 
2
O
9.EA.55Pentagonite
Ca(VO)Si
 
4
O
 
10
 · 4H
 
2
O
9.EA.60Penkvilksite
Na
 
4
Ti
 
2
Si
 
8
O
 
22
 · 4H
 
2
O
9.EA.60Tumchaite
Na
 
2
Zr(Si
 
4
O
 
11
) · 2H
 
2
O
9.EA.65Nabesite
Na
 
2
BeSi
 
4
O
 
10
 * 4 H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
AlSi
 
9
O
 
24
(OH)
 
6
 · 3H
 
2
O
9.EA.75Zeravshanite
Na
 
2
Cs
 
4
Zr
 
3
[Si
 
18
O
 
45
]*2H
 
2
O
9.EA.80Bussyite-(Ce)
(Ce,REE)
 
3
(Na,H
 
2
O)
 
6
MnSi
 
9
Be
 
5
(O,OH)
 
30
F
 
4
9.EA.85Plumbophyllite
Pb
 
2
Si
 
4
O
 
10
 · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
17.1.1Hectorite
Na
 
0.3
(Mg,Li)
 
3
(Si
 
4
O
 
10
)(F,OH)
 
2
17.1.3Agrellite
NaCa
 
2
Si
 
4
O
 
10
F
17.1.5Apophyllite-(KF)
KCa
 
4
(Si
 
8
O
 
20
)(F,OH) · 8H
 
2
O
17.1.6Apophyllite-(KOH)
KCa
 
4
(Si
 
8
O
 
20
)(OH,F) · 8H
 
2
O
17.1.7Hsianghualite
Ca
 
3
Li
 
2
(Be
 
3
Si
 
3
O
 
12
)F
 
2
17.1.8Leucophanite
NaCaBeSi
 
2
O
 
6
F
17.1.9Norbergite
Mg
 
3
(SiO
 
4
)(F,OH)
 
2
17.1.10Chondrodite
(Mg,Fe
2+
 
)
 
5
(SiO
 
4
)
 
2
(F,OH)
 
2
17.1.11Humite
(Mg,Fe
2+
 
)
 
7
(SiO
 
4
)
 
3
(F,OH)
 
2
17.1.12Clinohumite
(Mg,Fe
2+
 
)
 
9
(SiO
 
4
)
 
4
(F,OH)
 
2
17.1.13Canasite
K
 
2
Na
 
4
Ca
 
5
(Si
 
12
O
 
30
(OH,F)
 
4
17.1.14Charoite
(K,Na)
 
6-7
(Ca,Na)
 
18
[(Si
 
6
O
 
17
)(Si
 
12
O
 
30
)(Si
 
18
O
 
45
)](OH,F)
 
2
 · n H
 
2
O
17.1.15Cuspidine
Ca
 
4
(Si
 
2
O
 
7
)(F,OH)
 
2
17.1.16Bultfonteinite
Ca
 
2
(HSiO
 
4
)F · H
 
2
O
17.1.17Zeophyllite
Ca
 
4
Si
 
3
O
 
8
(OH,F)
 
4
 · 2H
 
2
O
17.1.18Rowlandite-(Y)
(Y,Ce)
 
4
Fe
2+
 
(Si
 
2
O
 
7
)
 
2
F
 
2
 (?)
17.1.19Yuksporite
(K,Ba)NaCa
 
2
(Si,Ti)
 
4
O
 
11
(F,OH) · H
 
2
O
17.1.20Yftisite-(Y)
(Y,Dy,Er)
 
4
(Ti,Sn)(SiO
 
4
)
 
2
O(F,OH)
 
6
17.1.21Mosandrite
Na
 
2
Ca
 
4
(REE)(Si
 
2
O
 
7
)
 
2
OF
 
3
17.1.22Hiortdahlite
(Ca,Na)
 
3
(Zr,Ti)(Si
 
2
O
 
7
)(O,OH,F)
 
2
17.1.23Burpalite
Na
 
2
CaZr(Si
 
2
O
 
7
)F
 
2
17.1.24Seidozerite
Na
 
8
Mn
2+
2
Zr
 
3
Ti
 
3
(Si
 
2
O
 
7
)
 
4
O
 
4
F
 
4
17.1.25Thorosteenstrupine
CaMnThSi
 
4
O
 
11
(OH)F · 6H
 
2
O
17.1.26Zircophyllite
(K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Zr,Ti)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
17.1.27Jinshajiangite
BaNaFe
2+
4
Ti
 
2
(Si
 
2
O
 
7
)
 
2
O
 
2
(OH)
 
2
F
17.1.28Rosenbuschite
(Ca,Na)
 
3
(Zr,Ti)(Si
 
2
O
 
7
)OF
17.1.29Narsarsukite
Na
 
4
(Ti,Fe)
 
2
[Si
 
8
O
 
20
](O,OH,F)
 
2
17.1.30Sonolite
Mn
2+
9
(SiO
 
4
)
 
4
(OH,F)
 
2

Other Names for Apophyllite-(NaF)

Synonyms:
Apophyllite-NaIMA1976-032Natroapophyllite
Other Languages:
German:Natroapophyllit
Japanese:ソーダ魚眼石
Russian:Апофиллит-(NaF)
Spanish:Natroapofilita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Apophyllite-(NaF)

Reference List:

- +
American Mineralogist (1981): 66: 416-423.

Internet Links for Apophyllite-(NaF)

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Natroapophyllite details from Handbook of Mineralogy (PDF)
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    • Localities for Apophyllite-(NaF)

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
          • Edong Mining District
    		Min Rec 33(2002), 465–471
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi City
    		Amer. Min.(1981) 66, 410-423
    Namibia
     
    • Khomas Region
      • Windhoek District
        • Windhoek
          • Aris
    		[http://www.koeln.netsurf.de/~w.steffens/aris.htm]
    UK
     
    • Northern Ireland
      • Co. Antrim
        • Glengormley
    		www.excaliburmineral.com
    USA
     
    • Nevada
      • Eureka Co.
        • Lynn District
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Humboldt Co.
        • Potosi District
          • Adam Peak
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • Oregon
      • Benton Co.
        • Coffin Butte
    		No reference Listed
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