Hyalotekite Mineral Data

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

- % Cl -0.01 % -O=Cl₂

Oxygen 30.39 % O

Fluorine 1.00 % F 1.00 % F

- % F -0.42 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_0.28Ba_1.94Pb_1.66Ca_2.06Na_0.08Mn²⁺_0.06Mg_0.03Cu_0.01Fe³⁺_0.01Al_0.05Si_0.19B_1.59

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

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 - Pinacoidal H-M Symbol ( 1) Space Group: I1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.45(1), 2.94(0.8), 3.53(0.8),

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:

PE_Hyalotekite= 474.73 barns/electron
U=PE_Hyalotekite x r_electron=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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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:

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