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About BarroisiteHide

Charles E. Barrois
The barroisite group minerals are sodium-calcium amphiboles defined with A(Na+K+2Ca)< 0.5 apfu and 1.5 apfu < C(Al+Fe3++2Ti).

Barroisite is defined with

C2+ position: Mg dominant
C3+ position: Al dominant
W position: (OH) dominant
Bluish-green to green.
5 - 6
Crystal System:
Named in 1922 by Murgoci in honor of Charles Eugene Barrois (April 21, 1851, Lilles, France - November 5, 1939, St Genevieve-en-Caux, France), French geologist and palaeontologist.
Barroisite is defined as a barroisite-group member with Mg>Fe2+ and Al>Fe3+ in the C position. Barroisite has been redefined in the 2012 Amphibole nomenclature in that:

1) The formula is changed from ☐(NaCa)(Mg3AlFe3+)(AlSi7O22)(OH)2 to ☐(NaCa)(Mg3Al2)(AlSi7O22)(OH)2. Consequently all pre-2012 literature references to barroisite should be checked to verify that Al>Fe3+ in the C position. If Fe3+>Al in the C position, the material will be ferri-barroisite.

2) The barroisite group is in the 2012 nomenclature defined with C(Al+Fe3++2Ti)>1,5 apfu, whereas the pre-2012 definition was defined with 6.5 < Si < 7.5 apfu. This redefinition does not change the formula, but some amphiboles qualifying as barroisite pre-2012 will now be winchite or ferri-winchite. Since the content of the C3+ position was not part of the pre-2012 definition, it was often omitted in the presentation of data.

Classification of BarroisiteHide

Redefined by the IMA
Approval History:
Redefined by IMA in 2012

9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles

16 : Silicates Containing Aluminum and other Metals
24 : Aluminosilicates of Fe, Mg, Ca and alkalis

Physical Properties of BarroisiteHide

Bluish-green to green.
5 - 6 on Mohs scale

Chemical Properties of BarroisiteHide


The barroisite group minerals are sodium-calcium amphiboles defined with A(Na+K+2Ca)< 0.5 apfu and 1.5 apfu < C(Al+Fe3++2Ti).

Barroisite is defined with

C2+ position: Mg dominant
C3+ position: Al dominant
W position: (OH) dominant
IMA Formula:
Common Impurities:

Crystallography of BarroisiteHide

Crystal System:
Cell Parameters:
a = 9.75 Å, b = 17.92 Å, c = 5.29 Å
β = 104.49°
a:b:c = 0.544 : 1 : 0.295
Unit Cell V:
894.87 ų (Calculated from Unit Cell)

Type Occurrence of BarroisiteHide

Synonyms of BarroisiteHide

Other Language Names for BarroisiteHide

Simplified Chinese:冻蓝闪石

Relationship of Barroisite to other SpeciesHide

Other Members of this group:
Ferro-barroisite☐{CaNa}{Fe2+3Al2}(AlSi7O22)(OH)2Mon. 2/m : B2/m
Forms a series with:

Related Minerals - Nickel-Strunz GroupingHide

9.DE.Clino-suenoite□{Mn2+2}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Clino-holmquistite Root Name☐{Li2}{Z2+3Z3+2}(Si8O22)(OH,F,Cl)2Mon.
9.DE.05Grunerite☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Ferri-fluoro-leakeite{Na}{Na2}{Mg2Fe3+2Li}(Si8O22)F2Mon. 2/m : B2/m
9.DE.10Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Ferro-tschermakite☐{Ca2}{Fe2+3Al2}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.10Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Tschermakite☐(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.10Parvo-manganotremolite☐{CaMn2+}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Fluoro-tremolite☐{Ca2}{Mg5}(Si8O22)F2Mon. 2/m : B2/m
9.DE.15Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2 Mon.
9.DE.15Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2Mon. 2/m : P2/m
9.DE.15Magnesio-fluoro-hastingsite{Na}{Ca2}{Mg4Fe3+}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.15Potassic-fluoro-hastingsite{K}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(F,OH)2Mon. 2/m : B2/m
9.DE.15Potassic-chloro-hastingsite{K}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(Cl,OH)2Mon. 2/m : B2/m
9.DE.15Fluoro-pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(F,OH)2Mon. 2/m : B2/m
9.DE.15Parvo-mangano-edenite{Na}{CaMn2+}{Mg5}(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-magnesio-hastingsite{K}{Ca2}{Mg4Fe3+}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-ferro-pargasite{K}{Ca2}{Fe2+4Al}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15Chromio-pargasite{Na}{Ca2}{Mg4Cr3+}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-fluoro-pargasite{K}{Ca2}{Mg4Al}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.15Ferri-kaersutiteNaCa2(Mg3Fe3+Ti)(Al2Si6O22)O2 Mon. 2/m : B2/m
9.DE.15Vanadio-pargasiteNaCa2(Mg3+4V)(Al2Si6)O22(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-taramiteNa(CaNa)(Fe2+3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-ferri-katophoriteNa(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-barroisite☐{CaNa}{Fe2+3Al2}(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-winchite ☐{CaNa}{Fe2+4Al}(Si8O22)(OH)2Mon.
9.DE.20Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.20Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2Mon. 2/m
9.DE.20Taramite{Na}{CaNa}{Mg3Al2}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20Fluoro-richterite{Na}{CaNa}{Mg5}(Si8O22)(F,OH)2Mon. 2/m
9.DE.20Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2Mon. 2/m : B2/m
9.DE.20Potassic-richterite{K}{CaNa}{Mg5}Si8O22(OH)2Mon. 2/m : B2/m
9.DE.20Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2Mon. 2/m
9.DE.20Ferri-winchite☐[CaNa][Mg4(Fe3+,Al)]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.20Fluoro-taramite{Na}{CaNa}{Mg3Al2}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.20Ferri-fluoro-katophoriteNa(CaNa)(Mg4Fe3+)(AlSi7O22)F2Mon. 2/m : B2/m
9.DE.25Arfvedsonite[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25EckermanniteNaNa2(Mg4Al}Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.25Riebeckite◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Ferro-ferri-nybøiteNaNa2[(Fe2+3,Mg)Fe3+2](AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.25Clino-ferro-ferri-holmquistite◻{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25Potassic-ferri-leakeite[K][Na2][Mg2Fe3+2Li]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Fluoro-nybøiteNaNa2(Mg3Al2)(AlSi7O22)(F,OH)2Mon. 2/m : B2/m
9.DE.25Mangani-dellaventuraite{Na}{Na2}{MgMn3+2LiTi4+}Si8O22O2Mon. 2/m : B2/m
9.DE.25Fluoro-pedriziteNaLi2(Mg2Al2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25Potassic-arfvedsonite[(K,Na)][Na2][Fe2+4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Mangani-obertiiteNa(Na2)(Mg3Mn3+Ti)(Si8O22)O2Mon. 2/m : B2/m
9.DE.25Ferro-ferri-pedrizite[Na][Li2][Fe2+2Fe3+2Li]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Potassic-magnesio-arfvedsonite[K][Na2][Mg4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25PedriziteNaLi2(LiMg2Al2)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25Ferro-pedriziteNaLi2(Fe2+2Al2Li)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Ferro-fluoro-pedrizite{Na}{Li2}{Fe2Al2Li}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.25Fluoro-leakeiteNaNa2(Mg2Al2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25Ferro-ferri-obertiiteNaNa2(Fe2+3Fe3+Ti)Si8O22O2Mon. 2/m : B2/m
9.DE.25Ferri-obertiiteNa(Na2)(Mg3Fe3+Ti)(Si8O22)O2Mon. 2/m : B2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.24.1Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6Mon. 2/m : B2/b
16.24.2Omphacite(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6Mon. 2/m
16.24.5Ferro-ferri-katophoriteNa(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2Mon. 2/m : B2/m
16.24.9Ferro-barroisite☐{CaNa}{Fe2+3Al2}(AlSi7O22)(OH)2Mon. 2/m : B2/m
16.24.13Taramite Root NameA(CaNa)(Z2+3Z3+2)(Al2Si6O22)(OH,F,Cl)2
16.24.16Osumilite-(Mg)KMg2Al3(Al2Si10)O30 Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc

Other InformationHide

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 BarroisiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Murgoci, G. (1922) Sur la classification des amphiboles bleues et de certaines hornblendes. Comptes Rendus Hebdomadaires des Séances de l’Académie des Sciences: 175: 426-429.
Leake, B.E. (1978) Nomenclature of amphiboles. American Mineralogist: 63: 1023-1052.
Leake, B.E., Woolley, A.R., Arps, C.E.S., Birch, W.D., Gilbert, M.C., Grice, J.D., Hawthorne, F.C., Kato, A., Kisch, H.J., Krivovichev, V.G., Linthout, K., Laird, J., Mandarino, J.A., Maresch, W.V., Nickel, E.H., Rock, N.M.S., Schumacher, J.C., Smith, D.C., Stephenson, N.C.N., Ungaretti, L., Whittaker, E.J.W., Guo, Y. (1997) Nomenclature of amphiboles: Report of the subcommittee on amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist: 35: 219–246.
Mandarino, J.A. (1998) The Second List of Additions and Corrections to the Glossary of Mineral Species (1995). The Amphibole Group. Mineralogical Record: 29: 169-174.
Hawthorne, F.C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist: 44: 1-21.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048.

Internet Links for BarroisiteHide

Localities for BarroisiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Tasmania
    • Circular Head municipality
      • Corinna-Savage River district
Turner, N.J., Bottrill, R. S. (2001 Blue amphibole, Arthur Metamorphic Complex, Tasmania: composition and regional tectonic setting. Australian Journal of Earth Sciences, 48:1, 167-181. Turner, N.J., Bottrill, R.S. (1993) Blue amphibole in the Proterozoic to Cambrian Arthur Metamorphic Complex, northwest Tasmania. Mineral Resources Tasmania, Report 1993/26, 15 pages.
Bottrill & Taheri, 2008, Savage River mine, Unpub. Rept, Mineral Resources Tasmania
  • Carinthia
    • Hohe Tauern
      • Glockner group
        • Hochtor area
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
  • Styria
    • Gleinalpe (Gleinalm)
Taucher, J. & Hollerer, C. E. (2015): Über einige Mineralien aus dem Gleinalmtunnel, 2. Röhre, Südvortrieb, Steiermark, Österreich. Der Steirische Mineralog, 29, 44-46.
  • Anhui
    • Anqing
      • Qianshan Co.
Eur. J. Mineral. , 1995, 7, pp. 119-138.
      • Taihu Co.
        • Lake Hualiangting
Franz, L., Romer, R.L., Klemd, R., Schmid, R., Oberhänsli, R., Wagner, T., and Dong Shuwen (2001): Contributions to Mineralogy and Petrology 141, 322-346.
      • Yuexi Co.
Yilin Xiao, Hoefs, J., van den Kerkhof, A.M., Fiebig, J., and Yongfei Zheng (2000): Contributions to Mineralogy and Petrology 139, 1-16.
  • Henan
    • Nanyang
      • Tongbai Co.
Chinho Tsai, and Hanwen Zhou (2005): American Geophysical Union Fall Meeting abstracts 2005, V43A-1563.
    • Xinyang
      • Luoshan Co.
        • Sujiahe
Ratschbacher, L., Franz, L., Enkelmann, E., Jonckheere, R., Pörschke, A., Hacker, B.R., Dong, S., and Zhang, Y. (2006), In: Hacker, B.R., McClelland, W.C., and Liou, J.G. (eds.): Ultrahigh-pressure metamorphism: Deep continental subduction. Geological Society of America Special Paper 403, 45–75.
      • Xin Co.
Ruyuan Zhang and Liou, J.G. (1994): European Journal of Mineralogy 6(2), 217-233.
  • Jiangsu
    • Lianyungang
      • Donghai Co.
Mattinson, C.G., Zhang, R.Y., Tsujimori, T., and Liou, J.G. (2004): American Mineralogist 89(11-12), 1772-1783; Rong Yan and Jianjun Yang (2013): Acta Petrologica Sinica 29(5), 1621-1633
  • Xinjiang
    • Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture)
Wei Lin and Masaki Enami (2006): Island Arc 15(4), 483-502.
      • Zhaosu Co.
Xin Liu, Wen Su, Jun Gao, Jilei Li, and Tuo Jiang (2013): Acta Petrologica Sinica 29(5), 1675-1684
Lifei Zhang, Jun Gao, Ekebair, S., and Zongxiu Wang (2001): Science in China, Series D (Earth Sciences), 44(1), 85-96; Jianrong Shi, Hong Yang, Fulai Liu, En Meng, Pinghua Liu, Fang Wang, and Jia Cai (2013): Acta Petrologica Sinica 29(6), 2251-2264; Jianrong Shi, Fulai Liu, Pinghua Liu, En Meng, Chaohui Liu, Hong Yang, Fang Wang, and Jia Cai (2014): Acta Petrologica et Mineralogica 33(1), 29-50
Dominican Republic
  • María Trinidad Sánchez Province
Krebs, M., Maresch, W. V., Schertl, H. P., Münker, C., Baumann, A., Draper, G., ... & Trapp, E. (2008). The dynamics of intra-oceanic subduction zones: a direct comparison between fossil petrological evidence (Rio San Juan Complex, Dominican Republic) and numerical simulation. Lithos, 103(1-2), 106-137.
  • El Oro Province
    • Santa Rosa Canton
      • La Chilca
Aspden, J.A., Bonilla, W., Duque, P., (1995): The El Oro metamorphic complex, Ecuador: geology and economic mineral deposits. Overseas Geology and Mineral Resources 67, pp. 63, 1 map, British Geological Survey publ., Nottingham.
  • Brittany
    • Morbihan
  • New Caledonia
    • Northern Province
Journal of Metamorphic Geology, Vol. 18, Issue 1, pp. 79-90, Jan. 2000
  • East Macedonia and Thrace
    • Rhodope
      • Thermes
Eur. J. Mineral. , 1994, 6, pp. 733-738.
  • South Aegean
    • Andros
Reinecke, T. (1982): Contributions to Mineralogy and Petrology 79, 333-336.
  • Aosta Valley
    • Saint-Marcel
Martin, S, Godard, G., Rebay, G. (2004): The subducted Tethys in the Aosta Valley (Italian western Alps). The 32nd international geological Congress, Field trip Guide Book B-02, 48 pp
Martin, S., Tartarotti, P. (1989): Polyphase HP metamorphism in the ophiolitic glaucophanites of the lower St. Marcel valley (Aosta, Italy). Ofioliti, 14, 135-156.
    • Valtournenche
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
  • Liguria
    • Genova Province
      • Genova
Jaroslav Hyrsl specimens
    • Savona Province
      • Varazze and Sassello
Ernst W.G. (1976): Mineral chemistry of eclogites and related rocks from the Voltri Group, Western Liguria, Italy. Schweiz. Mineral. Petr. Mitt., 56, 292-343; Ernst W.G. (1981): Petrogenesis of eclogites and peridotites from the Western and Ligurian Alps. Am. Mineral., 66, 443-472.
  • Piedmont
    • Metropolitan City of Turin
      • Germanasca Valley
        • Prali
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
  • Ehime
    • Niihama City
      • Besshi
        • Sebadani
Naohito Kishira, Akira Takasu and Md. Fazle Kabir(2013):Modes of occurrence and chemical compositions of amphiboles. in eclogite from the northeastern part of the Seba eclogitic basic schists in the Sambagawa metamorphic belt, central Shikoku, Japan. Geoscience Rept. Shimane Univ.,vol 32, pp33-42
    • Shikokuchuo City
      • Doi
Christophe Boutry collection
  • Tokushima
    • Tokushima City
DHZ, Vol. 2B, 2nd ed., p 636.
  • Yamaguchi
    • Iwakuni City
Nishimura, Y. (1971) Regional metamorphism of the Nishiki-cho district, southwest Japan. Journal of Science of the Hiroshima University, Series C (geology and mineralogy), 6, #3, 203-268.
New Zealand
  • Otago Region
    • Queenstown-Lakes District
Railton, G.T., Watters, W.A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104, 89 pages.
  • Sogn og Fjordane
    • Naustdal
Binns, R.A. 1967: Barroisite-bearing eclogite from Naustdal, Sogn og Fjordane, Norway. Journal of Petrology, 8, 349-371
    • Selje
      • Liset
Smith, D.C. (1988): a review of the peculiar mineralogy of the "Norwegian coesite-eclogite province", with crystal-chemical, petrological, geochemical and geodynamical notes and an extensive bibliography. In D.C. Smith, Ed., Eclogites and eclogite-facies rocks, p.1-206, Elsevier, Amsterdam 1988
    • Vågsøy
      • Sørpollen
Ungaretti, L., Smith, D.C. & Rossi,G. (1981): Crystal-chemistry by x-ray structure refinement and electron microprobe analysis of a series of sodic-calcic to alkali-amphiboles from the Nybö eclogite pod, Norway. Bulletin Société Française de Minéralogie et de Cristallographie. 104 :400–412
  • Krasnoyarsk Krai
Barkov, A. Y., Shvedov, G. I., Silyanov, S. A., & Martin, R. F. (2018). Mineralogy of Platinum-Group Elements and Gold in the Ophiolite-Related Placer of the River Bolshoy Khailyk, Western Sayans, Russia. Minerals, 8(6), 247.
    • Yermakovsky District
Barkov, A. Y., Tolstykh, N. D., Shvedov, G. I., & Martin, R. F. (2018). Ophiolite-related associations of platinum-group minerals at Rudnaya, western Sayans, and Miass, southern Urals, Russia. Mineralogical Magazine, 1-32.
  • Sakha Republic (Yakutia)
    • Daldyn-Alakit kimberlite field
      • Daldyn
  • Banská Bystrica Region
    • Rimavská Sobota Co.
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
  • Andalusia
    • Almería
      • Cóbdar
Canadian Mineralogist 40:67-83
  • Grisons
    • Engadin
      • Sils im Engadin
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 64
  • Valais
    • Zermatt - Saas Fee area
      • Matt Valley
        • Täsch Valley
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 63-64.
      • Saas Valley
        • Saas-Almagell
          • Allalin area
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 63-64
  • Marmara Region
    • Balikesir Province
      • Biga peninsula
        • Bayramiç
Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 47-56.
Tindle, A.G. (2008) Minerals of Britian and Ireland
  • Wales
    • Isle of Anglesey
Handbook of Mineralogy
  • Alaska
    • Fairbanks North Star Borough
      • Fairbanks
Am Min 63 (1978), 1023
  • Idaho
    • Clearwater Co.
Gnnar Farber mineral catalogue, 2017.
  • Maine
    • Somerset Co.
Anderson, 1991. Maine Mineral Localities, 2nd ed.
  • Vermont
Rocks & Min. Vol. 71, (1996)
    • Orleans & Lamoille Cos.
      • Lowell & Eden
Rocks & Min. Vol. 71, (1996)
    • Orleans Co.
Rocks & Min. Vol. 71, (1996)
  • Nueva Esparta
    • Margarita Island
Journal of Petrology (1981) Volume 22; Number 3; Pages 337-362
Mineral and/or Locality  
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