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Hydroxyapophyllite-(K)

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Formula:
KCa
 
4
(Si
 
8
O
 
20
)(OH,F) · 8H
 
2
O
System:TetragonalHardness:4 - 5
Name:Apophyllite was named in 1806 by Rene Just Haüy from the Greek for "away from" (ἀπό, apo) and "leaf" (φύλλον, phyllos), in allusion to the way it exfoliates upon heating. Chemical variants were recognized by Pete J. Dunn, Roland C. Rouse, and Julie A. Norberg in 1978.


Fluorapophyllite-(K)-Hydroxyapophyllite-(K) Series.


Mineral name changed from apophyllite-(KOH) to hydroxyapophyllite-(K) (Hatert et al. 2013)

Classification of Hydroxyapophyllite-(K)

IMA status:Approved
Strunz 8th edition ID:8/H.01-30
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
Hey's CIM Ref.:17.1.6

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

Type Locality:Ore Knob Mine, Ore Knob, Ashe Co., North Carolina, USA
Year of Discovery:1978

Physical Properties of Hydroxyapophyllite-(K)

Hardness (Mohs):4 - 5

Crystallography of Hydroxyapophyllite-(K)

Crystal System:Tetragonal
Cell Parameters:a = 8.97Å, c = 15.83Å
Ratio:a:c = 1 : 1.765
Unit Cell Volume:V 1,273.70 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Hydroxyapophyllite-(K)

Type:Uniaxial (+)
RI values: nω = 1.542 nε = 1.543
Maximum Birefringence:δ = 0.001

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Hydroxyapophyllite-(K)

Formula:
KCa
 
4
(Si
 
8
O
 
20
)(OH,F) · 8H
 
2
O
Simplified for copy/paste:KCa4(Si8O20)(OH,F)·8H2O
Essential elements:Ca, H, K, O, Si
All elements listed in formula:Ca, F, H, K, O, Si
Common Impurities:Al,Na

Relationship of Hydroxyapophyllite-(K) to other Species

Series:Forms a series with Fluorapophyllite-(K) (see here)
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.15Fluorapophyllite-(K)
KCa
 
4
(Si
 
8
O
 
20
)(F,OH) · 8H
 
2
O
9.EA.15Fluorapophyllite-(Na)
NaCa
 
4
(Si
 
8
O
 
20
)F · 8H
 
2
O
9.EA.20Magadiite
Na
 
2
Si
 
14
O
 
29
· 11H
 
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
· 4H
 
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
17.1.4Fluorapophyllite-(Na)
NaCa
 
4
(Si
 
8
O
 
20
)F · 8H
 
2
O
17.1.5Fluorapophyllite-(K)
KCa
 
4
(Si
 
8
O
 
20
)(F,OH) · 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
 
9
(SiO
 
4
)
 
4
F
 
2
17.1.13Canasite
K
 
2
Na
 
4
Ca
 
5
(Si
 
12
O
 
30
(OH,F)
 
4
17.1.14Charoite
(K,Sr)
 
15-16
(Ca,Na)
 
32
[Si
 
6
O
 
11
(O,OH)
 
6
]
 
2
[Si
 
12
O
 
18
(O,OH)
 
12
]
 
2
[Si
 
17
O
 
25
(O,OH)
 
18
]
 
2
(OH,F)
 
4
· ~3H
 
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
 
13
(Si
 
10
O
 
28
)F
 
10
· 6H
 
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
(◻,Ca,Na)
 
3
(Ca,REE)
 
4
Ti(Si
 
2
O
 
7
)
 
2
[H
 
2
O,OH,F]
 
4
· H
 
2
O
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 Hydroxyapophyllite-(K)

Synonyms:
Apophyllite-(KOH)Hydroxyapophyllite
Other Languages:
German:Hydroxyapophyllit
Russian:Гидроксиапофиллит
Апофиллит-(KOH)
Spanish:Hydroxyapophyllita

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 Hydroxyapophyllite-(K)

Reference List:

- +
Dunn, P. J., Rouse, R. C. & Norberg, J. A. (1978): Hydroxyapophyllite, a new mineral and a redefinition of the apophyllite group. American Mineralogist 63, 196-202.

Dunn, P. J. & Wilson, W. E. (1978): Nomenclature revision in the apophyllite group: hydroxyapophyllite, apophyllite, fluorapophyllite. Min. Record 9, 95-98.

Acta Crystallographica: (1987): B43: 517.

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 Hydroxyapophyllite-(K)

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Hydroxyapophyllite details from Handbook of Mineralogy (PDF)
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    Localities for Hydroxyapophyllite-(K)

    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.
    (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
     
    • New South Wales
      • Buckland Co.
        • Ardglen
    Mineralogical Record Vol19 No.6 p389; Tschernich, R.(1992), Zeolites of the World, p.48 Hodge-Smith, T., 1924. Notes on the occurrence of Zeolites, Ardglen, New South Wales. Records of the Australian Museum 14(3): 213–222
    • Tasmania
      • Burnie district
        • Ridgley
    Ref: FL Sutherland & RS Bottrill (2004) Zeolites of western Tasmania. Australian Jornal of Mineralogy 10:2 pp 59-72
      • Cape Grim district
    Sutherland, F. & Bottrill, R.(2004): Zeolites of western Tasmania. Australian Jornal of Mineralogy 10:2 pp 59-72; Tschernich, R. (1992): Zeolites of the World, p.49
    • Western Australia
      • Leonora Shire
        • Leinster
    Grguric, B.A., Nickel, E.H. (2005) Okenite from the Perseverance nickel mine, Western Australia: a first Australian occurrence. Australian Journal of Mineralogy, Vol. 11, pg. 25-26.
    Austria
     
    • Styria
      • Fischbacher Alpen
        • St. Jakob-Breitenau
          • Eibegggraben
    Postl, W. et al. (2008)
    Canada
     
    • Northwest Territories
    Anton R. Chakhmouradian and Roger H. Mitchell (2001) Three compositional varieties of perovskite from kimberlites of the Lac de Gras Field (Northwest Territories, Canada). Mineralogical Magazine 65:133-148
    • Québec
      • Montérégie
        • La Vallée-du-Richelieu RCM
          • Mont Saint-Hilaire
    Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
    Chile
     
    • Atacama Region
      • Copiapó Province
        • Inca de Oro
    Maurizio Dini & Robert Jenkins collections; material analysed by Dr. Uwe Kolitsch & Bob Jenkins
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Krušné Hory Mts (Erzgebirge)
          • Jáchymov District (St Joachimsthal)
    Lapis 2002(7/8), 63-65
    Finland
     
    • Southern Finland Region
      • Lappeenranta
    Hytönen,K. (1999): Suomen Mineraalit. Geologian tutkimuskeskus. Erillisjulkaisu, Jyväskylä, 399 pp.
      • Luumäki
    Ilkka Mikkola collection
    Arhe, Markku 1980. Iitin Perheniemen kalkkiivi-karsi esiintymästä ja sen ympäristön geologiasta. 155 s., 16 l. Geologian Tutkimuskeskus, arkistoraportti M/3111/-80/1/10.
    Germany
     
    • Bavaria
      • Franconia
        • Fichtelgebirge
          • Selb
            • Längenau
    Keck, E. (2008): Der Wartberg bei Längenau, nordöstlich von Selb, in Oberfranken. Aufschluss 59, 109-128.
    • Hesse
      • Greifenstein
        • Allendorf
    Betz, V., Leinweber, A., Klein, E. und Wahl, H. (2011): Prächtige Zeolithe: Die Mineralien des Steinbruchs "Alter Stein" bei Allendorf im Ulmtal, Westerwald, Hessen. Lapis, 36 (2), 15-38; 54.
    • Rhineland-Palatinate
      • Eifel
        • Gerolstein
          • Roth
    Blaß, G. & Schüller, W. (2012): Der Rother Kopf in der Vulkaneifel. Lapis, 37 (3), 20-29.
        • Kelberg
          • Höchstberg
    - Blass, G., (2010): Die neuen Mineralienfunde aus der Vulkaneifel, Mineralienwelt, Vol. 05
    Hungary
     
    • Fejér Co.
      • Szár Hill
        • Kőszárhegy
    Szakáll: Minerals of Szár Hill, 2004
    • Veszprém Co.
      • Balaton Uplands
        • Bazsi
          • Prága Hill
    Szakáll & Gatter, 1993; KOVÁCS-PÁLFFY, P. et al. (2005): A Karikás-tető (Prága-hegy, Balaton-felvidék) bazaltjának üregkitöltő ásványai [The cavity filling minerals of the basalt from Karikás-tető (Prága Hill, Balaton Highland, Transdanubia)]. A Magyar Állami Földtani Intézet Évi Jelentése, 95-118. [http://www.mafi.hu/microsites/EJ_digi/EJ_2005PDF/Kovacs_Palffy.pdf]
        • Tapolcai Basin
          • Uzsa (Uzsabánya)
    Szakáll & Gatter, 1993
    India
     
    • Maharashtra
      • Mumbai District (Bombay District)
        • Mumbai (Bombay)
          • Ward 38
            • Malad
    Personal experience-Rock Currier
    Wise, W.S. (1978): Yugawaralite from Bombay, India. Mineralogical Record 9 (5): 296
      • Pune District (Poonah District)
    Rock Currier
    Rock Currier photo
    Italy
     
    • Latium
      • Rieti Province
        • Rieti
          • Santa Rufina
    XRD analysis at Bari University
    • Liguria
      • La Spezia Province
        • Vara Valley
          • Borghetto Vara
    XRD analysis
    • Trentino-Alto Adige
      • Trento Province
        • Ala
          • Pilcante
    - Boscardin M., Bortolozzi G. and Cassinelli C. (1984): I minerali della cava di Val di Serra, Pilcante, Trento. Riv. Mineral. Ital., 4, 143-148.
    • Umbria
      • Perugia Province
        • Spoleto
    Stoppa F., Scordari F., Mesto E., Sharygin V.V. and Bortolozzi G. - Calcium-aluminium-silicate-hydrate "cement" phases and rare Ca-zeolite association at Colle Fabbri, Central Italy (2010). Centr.Eur.J.Geosci. 2 (2), pag. 175-187 .
    • Veneto
      • Vicenza Province
        • Altissimo
          • Del Tesoro Mt.
    Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
        • Gambellara
          • S.Marco hill
    Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
        • Montecchio Maggiore
          • San Pietro
    - Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
        • San Vito di Leguzzano-Schio
    Boscardin M., Daleffe A., Rocchetti I., Zordan A. “I minerali nel Vicentino”, Museo “G. Zannato”, Montecchio Maggiore (Vicenza), 2011.
        • San Vito di Leguzzano
    Boscardin, M., Pegoraro, S.(2000): La natrolite del vicentino. Rivista
    Boscardin, M., Mietto, P., Pegoraro, S., Orlandi, P., Secco, L.(2000):
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi City
            • Bicchu-cho (Bitchu-cho)
              • Fuka
    Kenya
     
    • Rift Valley Province
      • Mount Elgon
    Paolo Forti - Genetic processes of cave minerals in volcanic environments: An overview. Journal of Cave and Karst Studies, v. 67, no. 1, p. 3-13.
    Mexico
     
    • Chihuahua
      • Mun. de Aquiles Serdán
        • Santa Eulalia District
          • West Camp
            • Francisco Portillo
    Panczner(1987).
    Panczner (1987):94-366.
    • Guanajuato
      • Mun. de Guanajuato
        • Guanajuato
    Panczner (1987): 79-364.
        • La Luz
    Panczner(1987): 79 - 369.
    Panczner (1987): 236.
    • Hidalgo
      • Mun. de Pachuca
        • Pachuca de Soto (Pachuca)
    Panczner (1987): 87-344.
    • Zacatecas
      • Mun. de Mazapil
        • Noche Buena
    Panczner (1987): 100-378.
    Namibia
     
    • Khomas Region
      • Windhoek District
        • Aris
    [http://www.koeln.netsurf.de/~w.steffens/aris.htm]
    Norway
     
    • Nordland
      • Fauske
        • Sulitjelma
          • Sulitjelma Cu Mines
    Larsen, A.O.(1980): Fluorapofyllitt og hydroksyapofyllitt. NAGS-nytt 7(2),36-37 (in norwegian)
      • Rana
        • Mofjellet
    Larsen, A.O. (1980): Fluorapofyllitt og hydroksyapofyllitt. NAGS-nytt 7(2), 36-37 (in Norwegian.; Larsen, A.O. (1981): Hydroxyapophyllite from the Mofjellet mine, Mo i Rana, northern Norway. Contributions to the Mineralogy of Norway, No. 66. Norsk Geologisk Tidsskrift. 61, 297-300
    Romania
     
    • Hunedoara Co.
      • Brad
    www.minerals-of-the carpathians.eu (2009)
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    • Urals Region
      • Middle Urals
        • Sverdlovskaya Oblast'
          • Asbest
    Igor Savin data
      • Southern Urals
        • Chelyabinsk Oblast'
          • Ufaley District (Ufalei District)
    Talovina, I.V., Lazarenkov, V.G., and Vorontsova, N.I. (2003): Lithology and Mineral Resources 38(5), 403-415.
    South Africa
     
    • Mpumalanga Province
      • Nkangala District
        • Belfast
    Minerals of South Africa
        • Middelburg
    Cairncross, B. & Windisch, W.(1998): Microminerals from the Bushveld Complex South Africa. Mineralogical Record 29: 461-465
    • Northern Cape Province
      • Francis Baard District
    American Mineralogist, Volume 63, pages 196-202, 1978
      • Kalahari manganese field
        • Hotazel
    Gutzmer, J. & Cairncross, B. (1993): Recent discoveries from the Wessels mine South Africa. Mineralogocal Record 24 (5): 365-368
        • Kuruman
          • N'Chwaning Mines
    [Von Bezing, K. L. et al. (1991) - The Kalahari (Afrique du Sud) manganese field : an update, Mineralogical Record, 22 (3), 279-302.]
    Minerals of South Africa
    UK
     
    • England
      • Co. Durham
        • North Pennines
          • Weardale
            • Copthill
    No reference listed
    • Scotland
      • North West Highlands (Inverness-shire)
        • Isle of Skye
          • Duirinish
            • Dunvegan
    [UKJMM 16:21-27]
    Ukraine
     
    • Crimea Oblast'
      • Crimea peninsula
        • Bakhchisaray area
          • Trudolyubovka Village
    Karpenko V., Ignatenko K. Babingtonite form the Pervomaiskii quarry in the Crimea // Novye dannye o mineralakh (New Data on Minerals), 1991, #37, 58 - 63 (in Russ.) Getling R.V. Datolith of the Bodrak area in the Crimea and some features of his genesis // ZVMO, 1960, vol. 89, #1, 102 - 106 (in Russ.)
    Tischenko A. data
    USA
     
    • Arizona
      • Gila Co.
        • Dripping Spring Mts
          • Banner District
            • Christmas area
              • Christmas
    RRUFF Project Specimen ID: R050169
      • Maricopa Co.
    Richard Bideaux, Mineralogy ofArizona, 3rd ed.
    • California
      • Tulare Co.
        • Dumtah
    Mineralogical Record: 34(2): 159-166
      • Ventura Co.
        • Santa Monica Mts
    http://www.mindat.org/article.php/801/Tungusite+in+the+Santa+Monica+Mountains%2C+Los+Angeles+and+Ventura+Counties+CA
    • Nevada
      • Eureka Co.
        • Lynn District
    NBMG Spec. Pub. 31 Minerals of Nevada
    • New Jersey
      • Passaic Co.
        • Little Falls Township
    American Mineralogist, Volume 63, pages 196-202, 1978
    John Betts specimens for sale
        • Prospect Park
    MinRecord 9:89-92
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    Dunn(1995):Pt4:497.
    • New York
      • Lewis Co.
        • Diana Township
    Chamberlain, Steven C., Vandall T. King, Donald Cooke, George W. Robinson & Wayne Holt (1999), Minerals of the Gouverneur Talc Company No. 4 Quarry (Valentine deposit), Town of Diana, Lewis County, New York: Rocks & Minerals: 74(4): 236-249 (July, 1999).
    • North Carolina
      • Ashe Co.
        • Ore Knob
    Joseph A. Mandarino and Malcolm E. Back , 2004, Fleischers Glossary of Mineral Species 2004; American Mineralogist, Volume 63, pages 196-202, 1978
      • Cleveland Co.
        • Kings Mountain District
    Carolina Geological Society Field Trip Guidebook 1981, 39-48. Wilson,W.F and McKenzie.,1980,Mineral Collecting Sites In North Carolina, pp#50
    • Pennsylvania
      • Lebanon Co.
        • Cornwall Borough (Cornwall)
    Kearns, L.E. & Kearns, C.A. (2008) Mineral News, 24, #1, 8-9.
    • Virginia
      • Fairfax Co.
        • Culpeper Basin
          • Centreville
    Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25--27.
      • Loudoun Co.
        • Chantilly
    Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25-27.
        • Conklin
    Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25-27.
        • Leesburg
    Joseph Freillich specimen;
    Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25-27.
    Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25-27.
    Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25-27.
    Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25-27.
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