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Cymrite

A valid IMA mineral species - grandfathered
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About CymriteHide

05277500015107385052197.jpg
Flag of Wales
Formula:
BaAl2Si2(O,OH)8 · H2O
Colour:
Colourless, green, brown
Lustre:
Vitreous, Silky
Hardness:
2 - 3
Specific Gravity:
3.413
Crystal System:
Monoclinic
Name:
Named for the country of Wales, United Kingdom, which includes the type locality. Wales, in Welsh, is Cymru.
The UHP phase 'K-cymrite' is the unapproved K analogue. Compare the chemically related UM1990-58-SiO:AlBaH.

Chemically very similar to celsian and paracelsian.

A similar aluminosilicate anion is present, e.g., in the structure of kampfite and burckhardtite.


Unique IdentifiersHide

Mindat ID:
1205
Long-form identifier:
mindat:1:1:1205:4
GUID
(UUID V4):
a4361b0c-03a8-452c-9529-3a7298849a8f

IMA Classification of CymriteHide

Classification of CymriteHide

9.EG.05

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
78.1.3.1

78 : Unclassified Silicates
1 : Miscellaneous
16.12.6

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
CymIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of CymriteHide

Vitreous, Silky
Transparency:
Translucent
Colour:
Colourless, green, brown
Comment:
Green and brown colours are caused by inclusions of alteration products.
Streak:
White
Hardness:
2 - 3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {001}, imperfect on {110}
Fracture:
Irregular/Uneven
Density:
3.413 g/cm3 (Measured)    3.447 g/cm3 (Calculated)

Optical Data of CymriteHide

Type:
Biaxial (-)
RI values:
nα = 1.611 nβ = 1.619 nγ = 1.621
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong
Comments:
pseudouniaxial.

Chemistry of CymriteHide

Mindat Formula:
BaAl2Si2(O,OH)8 · H2O
Common Impurities:
Fe,Mn,K

Crystallography of CymriteHide

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P21
Setting:
P21
Cell Parameters:
a = 5.329(5) Å, b = 36.6 Å, c = 7.681(22) Å
β = 90°
Ratio:
a:b:c = 0.146 : 1 : 0.21
Unit Cell V:
1,498.11 ų (Calculated from Unit Cell)
Z:
8
Comment:
pseudohexagonal

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0008028CymriteFasshauer D W, Chatterjee N D, Marler B (1997) Synthesis, structure, thermodynamic properties, and stability relations of K-cymrite, K[AlSi3O8].H2O Physics and Chemistry of Minerals 24 455-46219970293
0015567CymriteDrits V A, Kashaev A A, Sokolova G V (1975) Crystal structure of cymrite Soviet Physics Crystallography 20 171-17519750293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.96 Å(100)
3.96 Å(90)
2.67 Å(70)
7.71 Å(50)
2.24 Å(40)
2.21 Å(40)
1.850 Å(40)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)
High-𝑇 alteration and/or metamorphism
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits

Type Occurrence of CymriteHide

General Appearance of Type Material:
As thin pseudohexagonal platelets and prisms, to 7 mm; also fibrous
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1944,36 and 1944,48.
Geological Setting of Type Material:
veins in manganese silicates
Associated Minerals at Type Locality:
Reference:
Campbell Smith, W., Bannister, F.A., Hey, M.H. (1949) Cymrite, a new barium mineral from the Benallt manganese mine, Rhiw, Carnarvonshire. Mineralogical Magazine, 28(206),676-681.

Other Language Names for CymriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
7 photos of Cymrite associated with MelanotekitePb2Fe3+2(Si2O7)O2
6 photos of Cymrite associated with ManganophylliteK(Fe,Mg,Mn)3AlSi3O10(OH)2
5 photos of Cymrite associated with AndraditeCa3Fe3+2(SiO4)3
3 photos of Cymrite associated with CalciteCaCO3
2 photos of Cymrite associated with BanalsiteNa2BaAl4Si4O16
2 photos of Cymrite associated with CelsianBa(Al2Si2O8)
1 photo of Cymrite associated with HedyphaneCa2Pb3(AsO4)3Cl
1 photo of Cymrite associated with PyriteFeS2
1 photo of Cymrite associated with AlbiteNa(AlSi3O8)
1 photo of Cymrite associated with LawsoniteCaAl2(Si2O7)(OH)2 · H2O

Related Minerals - Strunz-mindat GroupingHide

9.EG.10Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26Mon.
9.EG.10ManganonaujakasiteNa6(Mn2+,Fe2+)Al4Si8O26Mon. 2/m : B2/m
9.EG.15DmisteinbergiteCa(Al2Si2O8)Trig. 3 2 : P3 1 2
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5Mon. m
9.EG.25StrÀtlingiteCa2Al2SiO7 · 8H2OTrig. 3m : R3m
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2OMon. 2/m : P21/m
9.EG.30Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2OMon.
9.EG.30Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2OMon. 2/m
9.EG.30Tamaite(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2OMon. 2/m : P21/b
9.EG.35CoombsiteKMn2+13(Si,Al)18O42(OH)14Trig.
9.EG.35ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
9.EG.40Franklinphilite(K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2OTric.
9.EG.40LennilenapeiteK6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2OTric.
9.EG.40Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2OMon. 2/m : B2/m
9.EG.40Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2OTric. 1 : P1
9.EG.40ChalcoditeK(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27Tric. 1 : P1
9.EG.45Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)Mon. 2 : P21
9.EG.45TuscaniteKCa6(Si,Al)10O22(SO4,CO3)2(OH) · H2OMon. 2/m : P21/b
9.EG.45LevantiteKCa3Al2(SiO4)(Si2O7)(PO4)Mon. 2 : P21
9.EG.50JagoitePb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6Hex. 6 m2 : P6c2
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6Trig. 3m : P3 1c
9.EG.60HyttsjöitePb18Ba2Ca5Mn2+2Fe3+2Si30O90Cl · 6H2OTrig. 3 : R3
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2OMon. 2/m : B2/m
9.EG.70Britvinite[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]Tric. 1 : P1
9.EG.70RoymilleritePb24Mg9(Si10O28)(CO3)10(BO3)(SiO4)(OH)13O5Tric. 1 : P1
9.EG.75Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b
9.EG.75UM1989-30-SiO:AlBaCaFeHKMgMn(Ba,Ca)(Mn,Fe,Mg)22(Si,Al)32O76(OH)16 · 12H2O
9.EG.75KayupovaiteNa2Mn10[(Si14Al2)O38(OH)8] · 7H2OMon. 2/m : B2/b

Fluorescence of CymriteHide

Greenish white

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.

Internet Links for CymriteHide

References for CymriteHide

Localities for CymriteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada
 
  • Yukon
    • Watson Lake mining district
      • Macmillan Pass
Econ Geol (1989) +1 other reference
China
 
  • Gansu
    • Longnan
      • Cheng County
Can. J. Earth Sci. 44: 479–492 (2007)
  • Shaanxi
    • Ankang
      • Hanbin District
Shenghua Wu et al. (2010)
  • Yunnan
    • Honghe
      • Honghe County
Xing et al. (2011)
Cuba
 
  • GuantĂĄnamo Province
Blanco-Quintero et al. (2010)
Czech Republic
 
  • Moravian-Silesian Region
    • BruntĂĄl District
      • HornĂ­ BeneĆĄov
Staƈkovå
Fojt
  • Olomouc Region
    • JesenĂ­k District
Kuttna +1 other reference
France
 
  • Nouvelle-Aquitaine
    • PyrĂ©nĂ©es-Atlantiques
      • Oloron-Sainte-Marie
        • Eaux-Bonnes
Pouit et al. (1986) +1 other reference
Greece
 
  • South Aegean
    • Andros
Reinecke (1982)
Guatemala
 
  • Motagua Valley
Mikhail Ostrooumov and Alfredo Victoria Morales (2010)
India
 
  • Andhra Pradesh
    • Anantapur District
      • Wajrakarur kimberlite field
        • Wajrakarur–Lattavaram cluster
Kaur et al. (2016)
Iraq
 
  • Sulaymaniyah Governorate
    • Penjwen District
Mohammad et al. (2007)
Italy
 
  • Tuscany
    • Lucca Province
      • Stazzema
        • Sant'Anna di Stazzema
Biagioni et al. (2010) +1 other reference
Japan
 
  • Gunma Prefecture
    • Kiryu City
Takahashi (2009)
  • Kochi Prefecture
    • Kami City
Matsubara et al. (1988)
    • Konan City
Handbook of Mineralogy (c)
  • Kyoto Prefecture
    • Kyoto City
      • Ukyou-ku
Masutomi Museum specimen (Kyoto)
  • Niigata Prefecture
Shi et al. (2012)
  • Oita Prefecture
    • Saiki City
Nishio-Hamane et al. (2012)
  • Tokushima Prefecture
Fukuoka et al. (1988)
  • Tokyo Metropolis
    • Nishitama district
      • Okutama-cho
Matsubara (1985) +1 other reference
Myanmar
 
  • Kachin State
    • Mohnyin District
      • Hpakant Township (Hpakan; Phakant; Phakan)
Shi et al. (2012)
Shi et al. (2012)
New Zealand
 
  • Tasman Region
    • Golden Blocks Goldfield
Soong et al. (1975) +1 other reference
North America
 
Brosgé (1960)
North Macedonia
 
  • Veles Municipality
Bulletin Scientifique et al. (Zagreb) +1 other reference
      • Jakupica Mountains
        • Babuna Valley
Bermanec et al +1 other reference
Chukanov et al. (2015)
Jančev et al. (2017)
Romania
 
  • Bistrița-Năsăud County
UdubaƟa et al. (1983) +1 other reference
  • Harghita County
Editor:SzakĂĄll
Russia
 
  • Arkhangelsk Oblast
    • Novaya Zemlya District
Sorokhtina et al. (2008)
  • Komi Republic
Sorokhtina et al. (2008)
  • Murmansk Oblast
    • Kolsky District
Sorokhtina et al. (2008)
    • Kovdorsky District
      • Kovdor Massif
Sorokhtina et al. (2008)
  • Yamalo-Nenets Autonomous Okrug
Sorokhtina et al. (2008)
Sorokhtina et al. (2008)
South Africa
 
  • Northern Cape
    • John Taolo Gaetsewe District Municipality
      • Joe Morolong Local Municipality
        • Black Rock
Cairncross et al. (1995)
        • Hotazel
Wilson et al. (1978)
Spain
 
  • Andalusia
    • Huelva
      • Calañas
Aye et al. (1975)
  • Castile and Leon
Moro et al. (2001)
      • Losacino
        • Vide de Alba
Moro et al. (2001)
Sweden
 
  • VĂ€rmland County
    • Filipstad
      • LĂ„ngban Ore District
Gatedal (n.d.) +1 other reference
      • Nordmark mining district
        • Jakobsberg ore field
Holtstam et al. (1994)
      • Persberg ore district
        • Pajsberg
Nysten (2004)
Switzerland
 
  • Valais
    • Sierre
      • Anniviers
        • Ayer
Stalder et al. (1998) +1 other reference
UK
 
  • Scotland
    • Perth and Kinross
      • Aberfeldy
Coats (1980) +2 other references
  • Wales
    • Gwynedd
      • Aberdaron
        • Rhiw
Campbell Smith et al. (1949) +2 other references
USA
 
  • Alaska
    • Northwest Arctic Borough
      • Shungnak Mining District
Runnells (1964) +1 other reference
- (2008)
- (2008)
    • Yukon-Koyukuk Census Area
      • Amber Mining District
Runnells (1964) +1 other reference
  • California
    • San Benito County
Shi et al. (2012)
      • Panoche Pass
Essene (1967)
    • Santa Clara County
      • Pacheco Pass
Van Nostrand Reinholt Press: 368. +3 other references
  • Nevada
    • Humboldt County
      • Golconda Mining District
Castor et al. (2004)
 
Mineral and/or Locality  
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