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Milarite

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Minas Gerais, Southeast Region, Brazil
© Wright's Rock Shop

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Formula:
K
 
2
Ca
 
4
Al
 
2
Be
 
4
Si
 
24
O
 
60
·H
 
2
O
System:HexagonalHardness:6
This page provides mineralogical data about Milarite.

Classification of Milarite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/E.22-20
Nickel-Strunz 10th (pending) edition ID:9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
Dana 8th edition ID:63.2.1a.12

63 : CYCLOSILICATES Condensed Rings
2 : Condensed Rings (Milarite - Osumilite group)
Hey's CIM Ref.:16.6.5

16 : Silicates Containing Aluminum and other Metals
6 : Aluminosilicates of Be
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Type Occurrence of Milarite

Type Locality:Giuv Valley, Tujetsch (Tavetsch), Vorderrhein Valley, Grischun (Grisons; Graubünden), Switzerland
Year of Discovery:1870

Physical Properties of Milarite

Hardness (Mohs):6

Crystallography of Milarite

Crystal System:Hexagonal
Cell Parameters:a = 10.42Å, c = 13.8Å
Ratio:a:c = 1 : 1.324
Unit Cell Volume:V 1,297.61 ų (Calculated from Unit Cell)
Crystal Atlas:
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Milarite no.2 - Goldschmidt (1913-1926)

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Optical Data of Milarite

Type:Uniaxial (-)
RI values: nω = 1.532 - 1.551 nε = 1.529 - 1.548
Maximum Birefringence:δ = 0.003

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

Chemical Properties of Milarite

Formula:
K
 
2
Ca
 
4
Al
 
2
Be
 
4
Si
 
24
O
 
60
·H
 
2
O
Essential elements:Al, Be, Ca, H, K, O, Si
All elements listed in formula:Al, Be, Ca, H, K, O, Si
Common Impurities:Na

Relationship of Milarite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.CM.05Armenite
BaCa
 
2
Al
 
6
Si
 
9
O
 
30
·2H
 
2
O
9.CM.05Brannockite
(K,Na)Li
 
3
Sn
 
2
Si
 
12
O
 
30
9.CM.05Chayesite
K(Mg,Fe)
 
4
FeSi
 
12
O
 
30
9.CM.05Darapiosite
KNa
 
2
Li(Mn,Zn)
 
2
ZrSi
 
12
O
 
30
9.CM.05Eifelite
KNa
 
3
Mg
 
4
Si
 
12
O
 
30
9.CM.05Merrihueite
(K,Na)
 
2
(Fe,Mg)
 
5
Si
 
12
O
 
30
9.CM.05Osumilite-(Mg)
(K,Na)(Mg,Fe)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
·H
 
2
O
9.CM.05Osumilite
(K,Na)(Fe,Mg)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
·H
 
2
O
9.CM.05Poudretteite
KNa
 
2
B
 
3
Si
 
12
O
 
30
9.CM.05Roedderite
(Na,K)
 
2
(Mg,Fe)
 
5
Si
 
12
O
 
30
9.CM.05Sogdianite
(K,Na)
 
2
(Li,Fe)
 
3
(Zr,Ti,Fe)Si
 
12
O
 
30
9.CM.05Sugilite
KNa
 
2
(Fe,Mn,Al)
 
2
Li
 
3
Si
 
12
O
 
30
9.CM.05Yagiite
(Na,K)
 
3
Mg
 
4
(Al,Mg)
 
6
(Si,Al)
 
24
O
 
60
9.CM.05Berezanskite
KLi
 
3
Ti
 
2
Si
 
12
O
 
30
9.CM.05Dusmatovite
K(K,Na,[ ])(Mn
2+
 
,Y,Zr)
 
2
(Zn,Li)
 
3
Si
 
12
O
 
30
9.CM.05Shibkovite
K(Ca,Mn,Na)
 
2
(K
 
2-x
,□
 
x
)
 
2
ZnSi
 
12
O
 
30
9.CM.05Almarudite
(K,Na)(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(Be,Al)
 
3
[Si
 
12
O
 
30
]
9.CM.05Trattnerite
([],K)(Mg, Fe
2+
 
)
 
3
Fe
3+
2
[Si
 
12
O
 
30
]
9.CM.05Oftedalite
(Sc,Ca,Mn
2+
 
)
 
2
K[(Be,Al)
 
3
Si
 
12
O
 
30
]
9.CM.10Faizievite
K
 
2
Na(Ca
 
6
Na)Ti
 
4
Li
 
6
[F
 
2
|Si
 
24
O
 
66
]
Related Minerals - Hey's Index Grouping:
16.6.1Beryl
Be
 
3
Al
 
2
Si
 
6
O
 
18
16.6.2Euclase
BeAl[OH|SiO
 
4
]
16.6.3Bavenite
Ca
 
4
Be
 
2
Al
 
2
Si
 
9
O
 
26
(OH)
 
2
16.6.4Aminoffite
Ca
 
2
(Be,Al)Si
 
2
O
 
7
(OH)·H
 
2
O
16.6.6Lovdarite
(Na,K,Ca)
 
4
(Be,Al)
 
2
Si
 
6
O
 
16
·4H
 
2
O
16.6.7Surinamite
(Mg,Fe)
 
3
Al
 
4
BeSi
 
3
O
 
16
16.6.8Ferrotaaffeite-6N'3S
(Be,Zn,Mg)FeAl
 
4
O
 
8

Other Names for Milarite

German names:
Milarit
Russian names:
Миларит
Spanish names:
Milarita

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 Milarite

Reference List:Canadian Mineralogist (1980): 18: 52.

American Mineralogist (1991): 76: 1836.

Internet Links for Milarite

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  • Look for Milarite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Milarite in the Natural History Museum (London) online catalogue
  • Milarite details from Handbook of Mineralogy (PDF)
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    Localities for Milarite

    Hide Locality List
    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.
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    (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.
    Austria
     
    • Carinthia
      • Hohe Tauern Mts
        • Goldberg group
          • Tauern valley
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    • Lower Austria
      • Waldviertel
        • Gmünd
          • Schrems
            • Gebharts
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
        • Waidhofen an der Thaya
          • Pfaffenschlag
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Salzburg
      • Hohe Tauern Mts
        • Gastein valley
          • Bad Gastein
    		A. Strasser: Die Minerale Salzburgs, 1989
          • Böckstein
    		A. Strasser: Die Minerale Salzburgs, 1989
          • Kötschach valley
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
          • Naßfeld valley
    		A. Strasser: Die Minerale Salzburgs, 1989
    A. Strasser: Die Minerale Salzburgs, 1989
    A. Strasser: Die Minerale Salzburgs, 1989
          • Weissen valley
    		A. Strasser: Die Minerale Salzburgs, 1989
        • Habach valley
          • Breitfuß Mt. - Großer Finagl Mt. area
    		A. Strasser: Die Minerale Salzburgs (1989)
    A. Strasser: Die Minerale Salzburgs (1989)
          • Kratzenberg Mt.
            • Prehnite Island
    		A. Strasser: Die Minerale Salzburgs (1989)
          • Nasenkopf Mt.
    		A. Strasser: Die Minerale Salzburgs (1989)
            • Leckbachgraben (Leckbachrinne)
    		A. Strasser: Die Minerale Salzburgs (1989)
    A. Strasser: Die Minerale Salzburgs (1989)
        • Obersulzbach valley
    		Martin Slama Collection
          • Hopffeld area
    		A. Strasser: Die Minerale Salzburgs (1989)
    A. Strasser: Die Minerale Salzburgs (1989)
        • Rauris valley
          • Hüttwinkl valley
    		A. Strasser: Die Minerale Salzburgs (1989)
        • Stubach valley
          • Guggernbach valley (Lützlstubach)
    		A. Strasser: Die Minerale Salzburgs, 1989
        • Untersulzbach valley
          • Abichl Alp - Beryller area
    		A. Strasser: Die Minerale Salzburgs (1989)
          • Ascham Alp - Breitfuß Mt. - Sonntagskopf Mt. area
    		A. Strasser: Die Minerale Salzburgs (1989)
    A. Strasser: Die Minerale Salzburgs (1989)
    • Tyrol
      • East Tyrol
        • Kals valley
          • Dorf valley
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
        • Virgen valley
          • Virgen
            • Großer Nilbach valley
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    Brazil
     
    • Southeast Region
      • Minas Gerais
        • Jaguaraçu
    		[Mineralogical Record - Vol 25 No.3]
    Canada
     
    • Newfoundland and Labrador
      • Labrador
    		Miller (1996), Can.Min.: 34:349-371; Salvi & Williams-Jones (1995); Am.Min.: 80:1031-1040; Miller (1990), Newfoundland Dept. of Mines & Energy Geol. Sur. Report 90-1: 171-182.
    • Québec
      • Rouville Co.
        • Mont Saint-Hilaire
    		Min Rec 35:5 pp405-418., Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
    China
     
    • Fujian Province
      • Zhangzhou Prefecture
        • Yunxiao Co.
          • Tongbei
    		http://www.smartminerals.com/cina2004/art_fujian.htm and Ottens, B., 2005. Tongbei. Spessartine localities, Fujian Province, China. Mineralogical Record, 36 (1): 35-43
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • South Bohemia Region
        • Český Krumlov
    		Welser, P. et al.: Lithný pegmatit Nová Ves. Minerál, Special volume, 2007, roč. 15.
    • Moravia (Mähren; Maehren)
      • Olomouc Region
        • Šumperk (Mährisch Schönberg)
          • Maršíkov
    		Novák, M.: Maršíkov - Scheibengraben. In Exkurzní průvodce po mineralogických lokalitách na Sobotínsku. Univerzita Palackého v Olomouci, 2002, Olomouc, s. 38-41.
      • Vysočina Region
        • Havlíčkův Brod
    		Duda, Rejl, Slivka: "Mineralien", 1991
        • Žďár nad Sázavou
          • Věžná
    		Min Rec 35:5 pp405-418
    Petr Pauliš (2001): Nejzajímavější mineralogická naleziště Moravy a Slezska. Kuttna, Kutná Hora.
    Germany
     
    • Bavaria
      • Lower Bavaria
        • Bavarian Forest
          • Tittling
            • Matzersdorf
            • Stützersdorf
    		Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Thuringia
      • Wurzbach
        • Weitisberga
    		Wittern: "Mineralfundorte in Deutschland", 2001
    Italy
     
    • Aosta Valley
      • Courmayeur
        • Monte Bianco Massif
          • Veny Valley
    		Palenzona A.,Selmi P.,Fraccaro G.(2002)-La milarite della Brenva(Monte Bianco-AO)-Riv. Min. Ital.,Milano,fasc. 1,2002,pp. 50-51
    • Lombardy
      • Sondrio Province
        • Novate Mezzola
          • Codera Valley
    		Ghizzoni, S. & Mazzoleni, G. (2005): Itinerari mineralogici in val Codera. Geologia Insubrica, Ed., Milano, 316 pp.
    • Piedmont
      • Verbano-Cusio-Ossola Province
        • Baveno
          • Oltrefiume
            • Mount Camoscio
    		• Guastoni, A. & Pezzotta, F. (2004): Kristiansenite a Baveno, secondo ritrovamento mondiale della specie. Rivista Mineralogica Italiana, 4/2004, 247-251.
        • Ossola Valley
          • Baceno
            • Devero Alp (Devero Valley; Val Devero)
    		Lapis, 20 (7/8), 41-64+76.
          • Beura-Cardezza
    		Preite, D., Mattioli, V., Cini, V., Besana, G. (1997): Die mineralien von Beura und Villadossola (NO), Oberitalien. Lapis, 5/1997, 13-26.
          • Villadossola
    		Rivista Mineralogica Italiana, 2 157-170.
    • Trentino-Alto Adige
      • Bolzano Province (South Tyrol)
        • Aurina Valley (Ahrnbach Valley)
    		Min Rec 35:5 pp405-418
    Japan
     
    • Honshu Island
      • Chubu Region
        • Gifu Prefecture
          • Ena-gun
      • Kinki Region
        • Kyoto Prefecture
          • Kameoka City
    		Kawabe & Fujiwara (2002) Chigaku Kenkyu, 50, 215-217.
    Malawi
     
    • Zomba District
    		Lapis 2003(1), 18-21
    Mexico
     
    • Guanajuato
      • Mun. de Guanajuato
        • Guanajuato
    		Panczner (1987): 79-364.
    Mongolia
     
    • Gobi Desert
    		N.V. Vladykin data
    • Hovd Aimag (Khovd Aimag)
      • Altai Mts
    		P.M. Kartashov data
    Namibia
     
    • Erongo Region
      • Arandis District
        • Arandis
    		Min Rec 35:5 pp405-418
    Norway
     
    • Nordland
      • Tysfjord
          • Lapplegret (Lapplægran; Lapplægret)
    		Raade, 1966.
    • Oppland
      • Lunner
    		STEIN - Vinteren '92/'93- et lite tilbakeblikk (Harestua) - 2003 nr 3 p24-27
    • Oslo
      • Grorud
        • Bånkall
    		L. O. Kvamsdal (1998): Mineralene fra Nordmarkitt og Grefsensyenitt i Oslofeltet. AS Merkur-Trykk, Oslo.
    Eldjarn,K.(1978): "Mineraler i Norge-Fenakitt".NAGS-nytt 5(3),19-20. (in norwegian)
    • Østfold
      • Moss
    		R. Kristiansen (2005) "Milarittgruppens mineraler i Norge" (The Milaritegroup minerals in Norway), Bergverksmuseets skrifter #30, p. 22-23.
    • Telemark
      • Drangedal
        • Tørdal
    		Mineral. Pet. 75:89-99
    Kristiansen, R. (1998): Høydalen Litium-pegmatitt-Tørdal i Telemark. STEIN 25 (4), 21-30
    • Vestfold
      • Larvik
        • Lågendalen
    		R. Kristiansen (2005) "Milarittgruppens mineraler i Norge" (The Milaritegroup minerals in Norway), Bergverksmuseets skrifter #30, p. 22-23.
        • Stavern (Fredriksvärn)
    		R. Kristiansen (2005) "Milarittgruppens mineraler i Norge" (The Milaritegroup minerals in Norway), Bergverksmuseets skrifter #30, p. 22-23.
      • Re
        • Ramnes
    		Andersen, F. & Berge, S. A. (1994): Himberg pukkverk, Ramnes, Vestfold. STEIN 21 (2), 96-102 + Min Rec 35:5 pp 405-418
    Poland
     
    • Lower Silesia (Dolnośląskie)
      • Strzegom-Sobótka Massif
    		Feldspat, ExtraLapis, 30 (2006)
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Buriatia (Buryatia) Republic
    		Pavel M. Kartashov data
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Yuzhakovo Village
            • Alabashka pegmatite field
    		http://webcenter.ru/~minbooks/murz_kaz.html
    Spain
     
    • Madrid
    		Garcia G., Gonzalez C., Bueno A. (2004) - Cadalso de los Vidrios (Madrid), Bocamina, n° 14, pp: 12-46.
    Jordi Fabre
    Sweden
     
    • Jämtland
      • Bräcke
    		No reference listed
    • Södermanland
      • Haninge
    		Langhof, J., Holtstam, D. & Gustafsson, L., 2000: Chiavennite and zoned genthelvite-helvite as late-stage minerals of the Proterozoic LCT pegmatites at Utö, Stockholm, Sweden. GFF, Vol. 122 (Pt. 2, June), pp. 207-212. Stockholm. ISSN 1103-5897
      • Nynäshamn
    		NJMMh 1996, 564
    • Uppland
      • Österåker
    		No reference listed
      • Vaxholm
        • Resarö
    		No reference listed
    • Värmland
      • Hagfors
    		No reference listed
    • Västergötland
      • Göteborg
        • Västra Frölunda
    		Min Rec 35:5 pp405-418
    Switzerland
     
    • Bern
      • Hasli Valley
        • Grimsel
    		Christian Bracke Collection
    • Grischun (Grisons; Graubünden)
      • Vorderrhein Valley
        • Tujetsch (Tavetsch)
    		Neues Jahrb.Min.(1870) 80
          • Sedrun
    		Jahn, S. (2008): Der Druntobel bei Sedrun - ein weltbekannter Fundort. Mienralien-Welt, 19 (3), 42-67.
    • Uri
      • Reuss Valley
        • Göschenen
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 68
    • Wallis (Valais)
      • Binn Valley
        • Kriegalp Valley (Chriegalp Valley)
    		Min Rec 35:5 pp405-418
      • Goms
        • Fiesch
    		Stalder, H. A., de Quervain, F., Niggli, E., Graeser, St., Die Mineralfunde der Schweiz, (1973), p.124/5
        • Furka pass area
          • Furka
    		Stalder, H. A., de Quervain, F., Niggli, E., Graeser, St., Die Mineralfunde der Schweiz (1973) p. 127
    Christian Bracke Collection
        • Oberwald
    		Stalder, H. A., de Quervain, Niggli, E., Graeser, St., Die Mineralfunde der Schweiz, (1973), p. 113
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mts
        • Alayskiy (Alai) Range
    		http://www.koeln.netsurf.de/~w.steffens/dara.htm
    UK
     
    • England
      • Cornwall
        • Liskeard District
          • Caradon & Phoenix Area (South-Eastern Bodmin Moor)
            • Linkinhorne
    		Min Rec 35:5 pp405-418
      • Cumbria
        • South Eastern Region (Westmorland)
          • Eastern Fells
            • Shap
    		M.Wirth collection, D.Green identification (Manchester Univ.)
      • Devon
        • Okehampton area (Northern Dartmoor)
    		http://www.mineralman.f9.co.uk/quarries/meldon.htm
    USA
     
    • New Hampshire
      • Carroll Co.
        • Albany
    		Min Rec 35:5 pp405-418
        • Hale's Location
    		Min Rec 35:5 pp405-418
    No reference listed
    • North Carolina
      • Cleveland Co.
        • Kings Mountain District
    		To many to list here. If interested, we can e-mail them to you.
    Mineral and/or Locality
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