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Hyalotekite

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About HyalotekiteHide

Formula:
(Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl)
Colour:
white to pearly gray
Lustre:
Vitreous, Greasy
Hardness:
Specific Gravity:
3.81 - 3.82
Crystal System:
Triclinic
Name:
From the Greek ύαλος for "glass" and τήκεσθαι,"to melt", in allusion to its easy fusibility.
Isostructural with:
The crystal structure is very closely related to that of itsiite.


Classification of HyalotekiteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.CH.05

9 : SILICATES (Germanates)
C : Cyclosilicates
H : [Si4O12]8- 4-membered double rings
78.6.1.1

78 : Unclassified Silicates
6 :
17.5.50

17 : Silicates Containing other Anions
5 : Borosilicates

Physical Properties of HyalotekiteHide

Vitreous, Greasy
Transparency:
Transparent
Colour:
white to pearly gray
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
easy in two directions, indistinct in third direction
Density:
3.81 - 3.82 g/cm3 (Measured)    3.953 g/cm3 (Calculated)

Optical Data of HyalotekiteHide

Type:
Biaxial (+)
RI values:
nα = 1.963 nβ = 1.963 nγ = 1.966
2V:
Measured: 57° to 60.5°, Calculated: 55.4° to 62.5°
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
strong r < v
Optical Extinction:
undulatory extinction characteristic of hyalotekite is due to a fine mosaic microstructure.

Chemical Properties of HyalotekiteHide

Formula:
(Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl)
IMA Formula:
(Ba,Pb,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28F
Common Impurities:
Fe,Mn,Cu,Mg,Sr,Na,Rb

Crystallography of HyalotekiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 11.310(2) Å, b = 10.955(2) Å, c = 10.317(3) Å
α = 90.43(2)°, β = 90.02°, γ = 90.16°
Ratio:
a:b:c = 1.032 : 1 : 0.942
Unit Cell V:
1,278.25 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Coarsely crystalline, massive

Type Occurrence of HyalotekiteHide

Geological Setting of Type Material:
High temperature manganese skarns
Associated Minerals at Type Locality:

Other Language Names for HyalotekiteHide

German:Hyalotekit
Simplified Chinese:硼硅钡铅矿
Spanish:Hyalotekita
Traditional Chinese:硼矽鋇鉛礦

Relationship of Hyalotekite to other SpeciesHide

Other Members of this group:
ItsiiteBa2Ca(BSi2O7)2Tet. 4 2m : I4 2m
Kapitsaite-(Y)(Ba,K,Pb)4(Y,Ca)2Si8(B,Si)4O28FTric. 1 : P1
Khvorovite(Pb,Ba,K)4Ca2[Si8B2(Si,B)2O28]FTric.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Reedmergnerite3 photos of Hyalotekite associated with Reedmergnerite on mindat.org.
Pyrochlore Group1 photo of Hyalotekite associated with Pyrochlore Group on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.CH.05Kapitsaite-(Y)(Ba,K,Pb)4(Y,Ca)2Si8(B,Si)4O28FTric. 1 : P1
9.CH.10Iraqite-(La)KCa2(La,Ce,Th)Si8O20Tet.
9.CH.10SteacyiteK0.3(Na,Ca)2ThSi8O20Tet. 4/mmm (4/m 2/m 2/m) : P4/mcc
9.CH.10Turkestanite(K,◻)(Ca,Na)2ThSi8O20 · nH2OTet. 4/mmm (4/m 2/m 2/m) : P4/mcc
9.CH.10Arapovite(K1-xx)(Ca,Na)2U4+Si8O20 (x ~ 0.5)Tet. 4/mmm (4/m 2/m 2/m) : P4/mcc

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.5.1ManandoniteLi2Al4(Si2AlB)O10(OH)8Orth.
17.5.2ReedmergneriteNaBSi3O8Tric.
17.5.3SearlesiteNa(H2BSi2O7)Mon. 2 : P21
17.5.4OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)Trig.
17.5.5ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.6KalborsiteK6Al4BSi6O20(OH)4ClTet.
17.5.7BoromuscoviteKAl2(BSi3O10)(OH)2Mon.
17.5.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
17.5.9LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.10DatoliteCaB(SiO4)(OH)Mon. 2/m : P21/b
17.5.11DanburiteCaB2Si2O8Orth. mmm (2/m 2/m 2/m)
17.5.12HowliteCa2B5SiO9(OH)5Mon. 2/m : P21/b
17.5.13BakeriteCa4(H5B5Si3O20)Mon. 2/m : P21/b
17.5.14OyeliteCa10Si8B2O29 · 12.5H2OOrth.
17.5.15KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm (2/m 2/m 2/m)
17.5.16HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
17.5.17SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
17.5.18Stillwellite-(Ce)(Ce,La,Ca)BSiO5
17.5.19Tadzhikite-(Ce)Ca4Ce3+2Ti◻(B4Si4O22)(OH)2Mon.
17.5.20Melanocerite-(Ce)(Ce,Ca)5(SiO4,BO4)3(OH,0)Hex.
17.5.21Okanoganite-(Y)(Na,Ca)3(Y,Ce)12Si6B2O27F14
17.5.22Tritomite-(Ce)Ce5(SiO4,BO4)3(OH,O)
17.5.23Tritomite-(Y)Y5(SiO4,BO4)3(O,OH,F)
17.5.24Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
17.5.25Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3Orth. mmm (2/m 2/m 2/m)
17.5.26Holtite(Ta0.60.4)Al6BSi3O18(O,OH)2.25Orth. mmm (2/m 2/m 2/m) : Pnma
17.5.27DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.28 FerridraviteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
17.5.29Axinite-(Mg)Ca2MgAl2BSi4O15OHTric.
17.5.30Uvite SeriesCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)Trig. 3m : R3m
17.5.31GarrelsiteBa3NaSi2B7O16(OH)4Mon.
17.5.32TienshaniteKNa3Na6Ca2Ba6Mn6(Ti4+,Nb)6B12Si36O114(O,OH,F)11Hex. 6/m : P6/m
17.5.33LeucospheniteBaNa4Ti2B2Si10O30Mon.
17.5.34TaramelliteBa4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.35TitantaramelliteBa4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2ClxOrth.
17.5.36NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2ClOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.37Chromium-draviteNa(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig.
17.5.38WawayandaiteCa6Mn2BBe9Si6O23(OH,Cl)15Mon.
17.5.39Werdingite(Mg,Fe)2Al14Si4B4O37Tric.
17.5.40Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)Tric. 1 : P1
17.5.41AxiniteTric.
17.5.42TinzeniteCa2Mn2+4Al4[B2Si8O30](OH)2Tric.
17.5.44SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.45Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
17.5.46FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.47Axinite-(Fe)Ca2Fe2+Al2BSi4O15OHTric. 1 : P1
17.5.48HomiliteCa2(Fe2+,Mg)B2Si2O10Mon. 2/m : P21/b
17.5.49Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm (2/m 2/m 2/m)
17.5.51Hellandite-(Y)(Ca,REE)4Y2Al◻2(B4Si4O22) (OH)2Mon.

Fluorescence of HyalotekiteHide

blue, light brownish orange, or yellowish in SW UV
cathodoluminescence - bright yellow or blue

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 HyalotekiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Nordenskiõld A E (1877) Nya mineralier från Långban. Geologiska Föreningens i Stockholm Förhandlingar 3, 376-384
Christy A G, Grew E S, Mayo S C, Yates M G, Belakovskiy D I (1998) Hyalotekite, (Ba,Pb,K)4(Ca,Y)2Si8(B,Be)2(Si,B)2O28F, a tectosilicate related to scapolite: a new structure refinement, phase transitions and a short-range ordered 3b superstructure. Mineralogical Magazine 62, 77-92.
Moore, Paul B., T. Araki, and S. Ghose (1982), Hyalotekite, a complex lead borosilicate: its crystal structure and the lone-pair effect of Pb(II): American Mineralogist: 67: 1012-1020.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Sokolova E V, Ferraris G, Ivaldi G, Pautov L A, Khvorov P V (2000): Crystal structure of kapitsaite-(Y), a new borosilicate isotypic with hyalotekite - Crystal chemistry of the related isomorphous series. Neues Jahrbuch für Mineralogie, Monatshefte 2000, 74-84.

Internet Links for HyalotekiteHide

Localities for HyalotekiteHide

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.
Sweden (TL)
 
  • Värmland
    • Filipstad
GFF (1877) 3, 382; 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.
      • Nordmark district
        • Jakobsberg ore field
Kjell Gatedal
Tajikistan
 
  • Region of Republican Subordination
    • Tien Shan Mtn
      • Alai Range (Alayskiy)
Agakhanov, A.A., Pautov, L.A., Uvarova, Y.A., Sokolova, E.V., Hawthorne, F.C., Karpenko, V.Yu. (2005): Senkevichite, CsKNaCa2TiO[Si7O18(OH)], a new mineral. New Data on Minerals, 40, 11-16; Agakhanov, A.A., Pautov, L.A., Sokolova, E., Hawthorne, F.C., Karpenko, V.Yu., Siidra, O.I., Muftakhov, V.A. (2016): Odigitriaite, CsNa5Ca5[Si14B2O38]F2, a new cesium borosilicate mineral from the Darai-Pioz alkaline massif, Tajikistan: Description and crystal structure. Mineralogical Magazine, 80, (in press).; Grew, E. S., Yates, M. G., Belakovskiy, D. I., Rouse, R. C., Su, S. C., & Marquez, N. (1994). Hyalotekite from reedmergnerite-bearing peralkaline pegmatite, Dara-i-Pioz, Tajikistan and from Mn skarn, Langban, Varmland, Sweden: a new look at an old mineral. Mineralogical Magazine, 58(391), 285-298.
USA
 
  • Arizona
    • Mohave Co.
      • Artillery Mts
        • Artillery Peak
S. A. Williams (1982) Luddenite, a New Copper-Lead Silicate from Arizona Mineralogical Magazine 1982 46 : 363-364
Mineral and/or Locality  
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