Hyalotekite Mineral Data (original) (raw)
General Hyalotekite Information
Chemical Formula:
(Ba,Pb,Ca,K)6(B,Si,Al)2(Si,Be)10O28(F,Cl)
Composition:
Molecular Weight = 1,474.06 gm
Potassium 0.74 % K 0.89 % K2O
Barium 18.09 % Ba 20.20 % BaO
Sodium 0.13 % Na 0.17 % Na2O
Calcium 5.62 % Ca 7.87 % CaO
Magnesium 0.05 % Mg 0.09 % MgO
Manganese 0.23 % Mn 0.29 % MnO
Beryllium 0.27 % Be 0.76 % BeO
Aluminum 0.10 % Al 0.18 % Al2O3
Iron 0.05 % Fe 0.07 % Fe2O3
Copper 0.07 % Cu 0.09 % CuO
Silicon 18.57 % Si 39.73 % SiO2
Boron 1.17 % B 3.77 % B2O3
Lead 23.46 % Pb 25.27 % PbO
Chlorine 0.06 % Cl 0.06 % Cl
Oxygen 30.39 % O
Fluorine 1.00 % F 1.00 % F
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
K0.28Ba1.94Pb1.66Ca2.06Na0.08Mn2+0.06Mg0.03Cu0.01Fe3+0.01Al0.05Si0.19B1.59
Environment:
Remote structural kinship with that of gillespite.
IMA Status:
Valid Species (Pre-IMA) 1877
Locality:
Langbanshyttan, Vermland, Sweden. Link to MinDat.org Location Data.
Name Origin:
Named from the Greek "hyalos" and "tektos" owing to its property of forming a clear, colorless glass upon heating.
Name Pronunciation:
Hyalotekite + Pronunciation 
Synonym:
ICSD 31186
PDF 19-572
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Hyalotekite Crystallography
Axial Ratios:
a:b:c =1.0324:1:0.9417
Cell Dimensions:
a = 11.31, b = 10.955, c = 10.317, Z = 2; alpha = 90.43°, beta = 90.02°, gamma = 90.16° V = 1,278.25 Den(Calc)= 3.83
Crystal System:
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: I1
X Ray Diffraction:
By Intensity(I/Io): 3.45(1), 2.94(0.8), 3.53(0.8),
Crystal Structure:
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| | Moore P B , Araki T , Ghose S , American Mineralogist , 67 (1982) p.1012-1020, Hyalotekite, a complex lead borosilicate: Its crystal structure and the, lone-pair effect of Pb(II) | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Hyalotekite
Cleavage:
{???} Good, {???} Good
Color:
White, Pearly gray.
Density:
3.81
Diaphaneity:
Translucent to subtranslucent
Habit:
Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
5.5 - Knife Blade
Luminescence:
Fluorescent, Short UV=light brownish orange.
Luster:
Vitreous - Adamantine
Streak:
white
Optical Properties of Hyalotekite
Gladstone-Dale:
CI meas= -0.465 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.457 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2517,KPDmeas= 0.253,KC= 0.1728
Ncalc = 1.66
Optical Data:
Biaxial (+), a=1.963, b=1.963, g=1.966, bire=0.0030, 2V(Calc)=0, 2V(Meas)=small. Dispersion strong, r < v.
Calculated Properties of Hyalotekite
Electron Density:
Bulk Density (Electron Density)=3.50 gm/cc
note: Specific Gravity of Hyalotekite =3.83 gm/cc.
Fermion Index:
Fermion Index = 0.09
Boson Index = 0.91
Photoelectric:
PEHyalotekite = 474.73 barns/electron
U=PEHyalotekite x relectron=1,663.17 barns/cc.
Radioactivity:
GRapi = 9.80 (Gamma Ray American Petroleum Institute Units)
Concentration of Hyalotekite per GRapi unit = 10.20 (%)
Estimated Radioactivity from Hyalotekite 
- barely detectable
Hyalotekite Classification
Dana Class:
78.06.01.01 (78)Unclassified silicates
(78.06)possible tectosilicates
(78.06.01)Dana Group
78.06.01.01 Hyalotekite (Ba,Pb,Ca,K)6(B,Si,Al)2(Si,Be)10O28(F,Cl) I1 1
78.06.01.02 Kapitsaite-(Y)! (Ba,K,Pb,Na)4(Y,Ca,REE)2[Si8B2(B,Si)2O28F] I1 1
Strunz Class:
09.CH.05 09 - SILICATES (Germanates)
09.C - Cyclosilicates
09.CH -[Si4O12]8- 4-membered double rings
09.CH.05 Hyalotekite (Ba,Pb,Ca,K)6(B,Si,Al)2(Si,Be)10O28(F,Cl) I1 1
09.CH.05 Kapitsaite-(Y)! (Ba,K,Pb,Na)4(Y,Ca,REE)2[Si8B2(B,Si)2O28F] I1 1
Other Hyalotekite Information
References:
NAME( AmMin,v67:1020) PHYS. PROP.(AmMin,v67:1020) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Hyalotekite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Hyalotekite Specimen Label here :
Hyalotekite
(Ba,Pb,Ca,K)6(B,Si,Al)2(Si,Be)10O28(F,Cl)
Dana No: 78.06.01.01 Strunz No: 09.CH.05
Locality:
Notes: