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Cymrite

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Formula:
BaAl
 
2
Si
 
2
(O,OH)
 
8
· H
 
2
O
System:MonoclinicColour:Colourless, green, brown
Hardness:2 - 3
Name:From Cymru (Wales).
This page provides mineralogical data about Cymrite.

Classification of Cymrite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/H.38-60
Nickel-Strunz 10th (pending) edition ID:9.EG.05

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
Dana 8th edition ID:78.1.3.1

78 : Unclassified Silicates
1 : Miscellaneous
Hey's CIM Ref.:16.12.6

16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn
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Type Occurrence of Cymrite

Type Locality:Benallt Mine (Tyddyn Meirion mine; Ty Canol mine), Rhiw, Llanfaelrhys, Lleyn Peninsula, Gwynedd (Caernarvonshire), Wales, UK
Year of Discovery:1949

Physical Properties of Cymrite

Lustre:Vitreous, Silky
Diaphaneity (Transparency):Translucent
Colour:Colourless, green, brown
Comment:Green and brown colours are caused by inclusions of alteration products.
Streak:White
Hardness (Mohs):2 - 3

Crystallography of Cymrite

Crystal System:Monoclinic
Cell Parameters:a = 5.32Å, b = 36.6Å, c = 7.66Å
β = 90°
Ratio:a:b:c = 0.145 : 1 : 0.209
Unit Cell Volume:V 1,491.49 ų (Calculated from Unit Cell)

Optical Data of Cymrite

Type:Biaxial (-)
RI values: nα = 1.611 nβ = 1.619 nγ = 1.621
Maximum Birefringence:δ = 0.010

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

Chemical Properties of Cymrite

Formula:
BaAl
 
2
Si
 
2
(O,OH)
 
8
· H
 
2
O
Simplified for copy/paste:BaAl2Si2(O,OH)8·H2O
Essential elements:Al, Ba, H, O, Si
All elements listed in formula:Al, Ba, H, O, Si
Common Impurities:Fe,Mn,K

Relationship of Cymrite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EG.10Naujakasite
(Na,K)
 
6
(Fe
2+
 
,Mn
2+
 
,Ca)(Al,Fe)
 
4
Si
 
8
O
 
26
9.EG.10Manganonaujakasite
Na
 
6
(Mn
2+
 
,Fe
2+
 
)Al
 
4
Si
 
8
O
 
26
9.EG.15Dmisteinbergite
CaAl
 
2
Si
 
2
O
 
8
9.EG.20Kampfite
Ba
 
12
(Si
 
11
Al
 
5
)O
 
31
(CO
 
3
)
 
8
Cl
 
5
9.EG.25Strätlingite
Ca
 
2
Al
 
2
SiO
 
7
· 8H
 
2
O
9.EG.25Vertumnite
Ca
 
4
Al
 
4
Si
 
4
O
 
6
(OH)
 
24
· 3H
 
2
O
9.EG.30Eggletonite
(Na,K,Ca)
 
2
(Mn,Fe)
 
8
(Si,Al)
 
12
O
 
29
(OH)
 
7
· 11H
 
2
O
9.EG.30Ganophyllite
(K,Na,Ca)
 
2
Mn
 
8
(Si,Al)
 
12
(O,OH)
 
32
· 8H
 
2
O
9.EG.30Tamaite
(Ca,K,Ba,Na)
 
3-4
Mn
 
24
(Si,Al)
 
40
(O,OH)
 
112
· 21H
 
2
O
9.EG.35Coombsite
K(Mn,Fe,Mg)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
9.EG.35Zussmanite
K(Fe,Mg,Mn)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
9.EG.40Franklinphilite
(K,Na)
 
4
(Mn,Zn,Mg,Fe)
 
48
(Si,Al)
 
72
(O,OH)
 
216
· 6H
 
2
O
9.EG.40Lennilenapeite
K
 
6-7
(Mg,Mn,Fe,Zn)
 
48
(Si,Al)
 
72
(O,OH)
 
216
· 16H
 
2
O
9.EG.40Parsettensite
K
 
1.2
Mn
 
8
(Si,Al)
 
12
O
 
26
(OH)
 
10
9.EG.40Stilpnomelane
(K,Ca,Na)(Fe
2+
 
,Mg,Al,Fe
3+
 
)
 
8
(Si,Al)
 
12
(O,OH)
 
36
· nH
 
2
O
9.EG.45Latiumite
(Ca,K)
 
4
(Si,Al)
 
5
O
 
11
(SO
 
4
,CO
 
3
)
9.EG.45Tuscanite
(K(Ca,Na)
 
6
(Si,Al)
 
10
O
 
22
[SO
 
4
,CO
 
3
,(OH)
 
2
] · H
 
2
O
9.EG.50Jagoite
Pb
 
18
Fe
3+
4
[Si
 
4
(Si,Fe
3+
 
)
 
6
][Pb
 
4
Si
 
16
(Si,Fe)
 
4
]O
 
82
Cl
 
6
9.EG.55Wickenburgite
CaPb
 
3
Al
 
2
Si
 
10
O
 
24
(OH)
 
6
9.EG.60Hyttsjöite
Pb
 
18
Ba
 
2
Ca
 
5
Mn
2+
2
Fe
3+
2
Si
 
30
O
 
90
Cl · 6H
 
2
O
9.EG.65Armbrusterite
K
 
5
Na
 
7
Mn
 
15
[(Si
 
9
O
 
22
)
 
4
](OH)
 
10
· 4H
 
2
O
9.EG.70Britvinite
[Pb
 
7
(OH)
 
3
F(BO
 
3
)
 
2
(CO
 
3
)][Mg
 
4.5
(OH)
 
3
(Si
 
5
O
 
14
)]
9.EG.75Bannisterite
Ca
 
0.5
(K,Na)
 
0.5
(Mn,Fe,Zn)
 
10
(Si,Al)
 
16
O
 
38
(OH)
 
8
· 5.5H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
16.12.1Stronalsite
SrNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
16.12.2Slawsonite
(Sr,Ca)Al
 
2
Si
 
2
O
 
8
16.12.3Brewsterite
16.12.4Celsian
BaAl
 
2
Si
 
2
O
 
8
16.12.5Paracelsian
BaAl
 
2
Si
 
2
O
 
8
16.12.7Edingtonite
Ba[Al
 
2
Si
 
3
O
 
10
] · 4H
 
2
O
16.12.8Banalsite
BaNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
16.12.9Harmotome
(Ba
 
0.5
,Ca
 
0.5
,K,Na)
 
5
[Al
 
5
Si
 
11
O
 
32
] · 12H
 
2
O
16.12.10Hyalophane
(K,Ba)[Al(Si,Al)Si
 
2
O
 
8
]
16.12.11Balipholite
BaLiMg
 
2
Al
 
3
(Si
 
2
O
 
6
)
 
2
(OH)
 
4
16.12.12Armenite
BaCa
 
2
Al
 
6
Si
 
9
O
 
30
· 2H
 
2
O
16.12.13Wellsite
(Ba,Ca,K
 
2
)Al
 
2
Si
 
6
O
 
16
· 6H
 
2
O
16.12.14Merlinoite
(K,Na)
 
5
(Ca,Ba)
 
2
Al
 
9
Si
 
23
O
 
64
· 23H
 
2
O
16.12.15Anandite
(Ba,K)(Fe
2+
 
,Mg)
 
3
((Si,Al,Fe)
 
4
O
 
10
)(S,OH)
 
2
16.12.16Fraipontite
(Zn,Al)
 
3
((Si,Al)
 
2
O
 
5
)(OH)
 
4
16.12.17Sauconite
Na
 
0.3
Zn
 
3
((Si,Al)
 
4
O
 
10
)(OH)
 
2
· 4H
 
2
O
16.12.18Minehillite
(K,Na)
 
2-3
Ca
 
28
Zn
 
4
Al
 
4
Si
 
40
O
 
112
(OH)
 
16
16.12.19Hendricksite
K(Zn,Mg,Mn
2+
 
)
 
3
(AlSi
 
3
O
 
10
)(OH)
 
2
16.12.20Baileychlore
(Zn,Fe,Al,Mg)
 
6
((Si,Al)
 
4
O
 
10
)(OH)
 
8

Other Names for Cymrite

Other Languages:
German:Cymrit
Japanese:キュムリ石
キムリ石
Russian:Кимрит
Simplified Chinese:铝硅钡石
Spanish:Cymrita

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 Cymrite

Reference List:

- +
American Mineralogist: 35: 135.

American Mineralogist: 49: 158-165.

Doklady Akademii Nauk SSSR: 169: 201-203.

Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Cymrite as an Indicator of High Barium Activity in the Formation of Hydrothermal Rocks Related to Carbonatites of the Kola Peninsula. Geology of Ore Deposits 50(7), 620-628.

N. B. Bolotina, R. K. Rastsvetaeva and A. A. Kashaev (2010): Refinement of the twinned structure of cymrite from the Ruby Creek deposit (Alaska). Crystallography Reports 55, 569-574.


Internet Links for Cymrite

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

    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.
    Burma (Myanmar)
    Xiaoli Wang and Xinqiang Yuan (2006): Journal of Gems & Gemmology 9(2), 30-33
    Canada
     
    • Yukon Territory
      • Watson Lake Mining District
        • Macmillan Pass
    Econ Geol (1989)84:841-856
    China
     
    • Gansu Province
      • Longnan Prefecture
        • Cheng Co.
    Can. J. Earth Sci. 44: 479–492 (2007)
    • Shaanxi Province
      • Ankang Prefecture
        • Hanbin District
    Shenghua Wu, Jiajun Liu, Zhenjiang Liu, Degao Zhai, and Meijuan Yao (2010): Geology in China 37(5), 1469-1479
    Czech Republic
     
    • Moravia (Mähren; Maehren)
      • Moravia-Silesia Region
        • Bruntál
    Staňková, J. et al.: Cymrit z ložiska Pb-Zn-rud u Horního Benešova. Časopis pro mineralogii a geologii, 1989, roč. 34, č. 2, s. 137-150.
        • Rýmařov
    Fojt, B. et al.: Paragenetická charakteristika ložisek Pb-Zn rud v širším okolí Horního Města u Rýmařova. Acta Mus. Moraviae, Sci. geol., 2007, 92, 3-57.
      • Olomouc Region
    Petr Paulis (2001): Die interessanten mineralogische Fundstellen in Mahren und Schlesien; Kuttna, Kutná Hora p69-73
    Greece
     
    • Aegean Islands Department (Aiyaíon)
      • Kykládes Prefecture
        • Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon)
          • Andros Island
    Reinecke, T. (1982): Contributions to Mineralogy and Petrology 79, 333-336.
    Guatemala
     
    • Motagua Valley
    Mikhail Ostrooumov and Alfredo Victoria Morales (2010) Mexican jadeite-bearing rock: a first mineralogical and gemmological approach. The Journal of Gemmology, Vol. 32, No. 1–4.
    Italy
     
    • Tuscany
      • Lucca Province
        • Apuan Alps
          • Stazzema
            • Sant'Anna di Stazzema
    Biagioni, C. & Orlandi, P. (2010). Cymrite and benstonite from the Monte Arsiccio mine (Apuan Alps, Tuscany, Italy): first Italian occurrence. Plinius, 36, 365.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Gunma Prefecture
          • Kiryuu City
    Takahashi, S. (2009) Suisyou, 20, 6-7.
        • Tokyo Metropolis
          • Nishi-Tama-gun
            • Okutama-cho
    Matsubara, S. (1985) Bulletin of the National Science Museum, 11, 37-95.; Matsubara S, Miyawaki R, Yokoyama K, Shimizu M, Imai H (2004) Tokyoite, Ba2Mn3+(VO4)2(OH), a new mineral from the Shiromaru mine, Okutama, Tokyo, Japan. Journal of Mineralogical and Petrological Sciences 99, 363-367
      • Kinki Region
        • Kyoto Prefecture
          • Kyoto City
    Masutomi Museum specimen (Kyoto)
    • Kyushu Region
      • Oita Prefecture
        • Saiki City
    Alfredo Petrov specimen
    • Shikoku Island
      • Kochi Prefecture
        • Konan City
    Handbook of Mineralogy, (c) 2001.
    New Zealand
     
    • South Island
      • Nelson
    Soong, R., & Olivecrona, J. A. (1975). An occurrence of cymrite in black shale, north-west Nelson, South Island, New Zealand. Mineralogical Magazine, 40, 311-312. Railton, G.L. & Watters, W.A., Minerals of New Zealand, New Zealand Geological Survey Bull. #104 (1990).
    Republic of Macedonia
     
    • Veles
    Bulletin Scientifique, Section A: Sciences Naturelles, Techniques et Medicales (Zagreb) (1975), 20 (9-10), 274; V. Bermanec et al. (1993): "Zn-rich magnetoplumbite from Nezilovo, Macedonia", Eur. Journ. Mineral., 5, 957-960
    Romania
     
    • Bistrița-Năsăud Co.
      • Rodna Mtn (Rodnei Mtn)
    Udubaşa, G., Nedelcu, L., Andăr, A., and Andăr, P. (1983): Mineralium Deposita 18, 519-528.
    • Harghita Co.
    Editor:Szakáll,www.minerals-of-the-carpathians.eu
    Russia
     
    • Northern Region
      • Arkhangel'skaja Oblast'
        • Novaya Zemlya District
          • Novaya Zemlya
    Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Geology of Ore Deposits 50(7), 620-628.
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Kovdor Massif
    Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Geology of Ore Deposits 50(7), 620-628.
    Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Geology of Ore Deposits 50(7), 620-628.
    • Western-Siberian Region
      • Polar Urals
    Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Geology of Ore Deposits 50(7), 620-628.
    Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Geology of Ore Deposits 50(7), 620-628.
    Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Geology of Ore Deposits 50(7), 620-628.
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese field
        • Black Rock
    Minerals of South Africa
        • Hotazel
    Wilson, W.E. & Dunn, P.J., (1978) Famous localities: The Kalahari manganese field. Mineralogical Record 9(3) 137-153.
    Spain
     
    • Andalusia
      • Huelva
        • Calañas
    Aye, F., and Strauss, G.K. (1975): C. R. Acad. Sci. Paris 281(24), 1935-1938.
    • Castile and Leon
    Moro, M.C., Cembranos, M.L., and Fernandez, A. (2001): Canadian Mineralogist 39, 1039-1051.
        • Losacino
          • Vide de Alba
    Moro, M.C.,Cembranos,M.L. y Fernandez,A. (2001) Celsian, (Ba,K)-feldspar and cymrite from SEDEX barite deposits of Zamora, Spain. The Canadian Mineralogist, 39, 1039-1051
    Sweden
     
    • Värmland
      • Filipstad
    Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183. ; K:Gatedal
        • Nordmark (Nordmarksberg)
    MinMag 58, 172
        • Persberg district
          • Pajsberg
    Nysten, P. (2004): Harstigen ett mineralogisk eldorado i Bergslagen. Norsk Bergverksmuseum Skrift 28: 5-13
    Switzerland
     
    • Wallis (Valais)
      • Anniviers Valley
        • Ayer
    Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 128.; Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
    UK
     
    • Wales
      • Gwynedd (Caernarvonshire)
        • Lleyn Peninsula
          • Llanfaelrhys
            • Rhiw
    Campbell Smith, W., Bannister, F. A., & Hey, M. H. (1949). Cymrite, a new barium mineral from the Benallt manganese mine, Rhiw, Carnarvoshire. Mineralogical Magazine, 28, 676-681. ; UK Journal of mines & Minerals, number 29 pp47-48; UKJMM Vol.29 p.14
    USA
     
    • Alaska
      • North Slope Borough
    Brosgé, W. F. (1960). Metasedimentary rocks in the south-central Brooks Range, Alaska. U. S. Geological Survey Prof. Paper, 400-B, 351-352.
      • Northwest Arctic Borough
        • Shungnak District
    U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
          • Ruby Creek Prospect
    U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
    U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
      • Yukon-Koyukuk Borough
        • Amber District
    Runnells, D.D. (1964). Cymrite in a copper deposit, Brooks Range, Alaska. The American Mineralogist, 49, 158-165.
    • California
      • San Benito Co.
        • Diablo Range
          • Panoche Pass
    Essene, J. (1967). An occurrence of cymrite in the Franciscan Formation, California. The American Mineralogist, 52, 1885-1890.
      • Santa Clara Co.
        • Diablo Range
          • Pacheco Pass
    Essene, E.J. (1967) An occurrence of Cymrite in the Franciscan formation, California. American Mineralogist: 52: 1885-1890; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 368.
    • Nevada
      • Humboldt Co.
        • Golconda District
    NBMG Spec. Pub. 31 Minerals of Nevada
    Mineral and/or Locality  
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