Bellbergite Mineral Data (original) (raw)

General Bellbergite Information

Help on Chemical Formula: Chemical Formula:

(K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72•30(H2O)

Help on Composition: Composition:

Molecular Weight = 3,214.44 gm

Potassium 1.58 % K 1.90 % K2O

Barium 1.28 % Ba 1.43 % BaO

Sodium 0.50 % Na 0.67 % Na2O

Strontium 6.54 % Sr 7.74 % SrO

Calcium 6.61 % Ca 9.25 % CaO

Aluminum 15.11 % Al 28.55 % Al2O3

Silicon 15.73 % Si 33.65 % SiO2

Hydrogen 1.88 % H 16.81 % H2O

Oxygen 50.77 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

K1.3Na0.7Ca5.3Sr2.4Ba0.3Al18Si18O72•30(H2O)

Help on Environment: Environment:

Ca-rich xenoliths in leucite tephrite lava.

Help on IMA Status: IMA Status:

Approved IMA 1993

Help on Locality: Locality:

Bellberg volcano, Mayen, Laacher See area, Eifel, Germany. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for the locality.

Help on Name Pronunciation: Name Pronunciation:

Bellbergite + Pronunciation Say BELLBERGITE

Help on Synonym: Synonym:

ICSD 64728

IMA1990-057

PDF 45-1482

Bellbergite Image

Click Here for Larger Bellbergite Image in a New Browser Window Images:

Click Here for Larger Bellbergite Image Bellbergite Comments: Small colorless to white hexagonal crystals of bellbergite on matrix. Location: Ettringer Bellerberg, Ettringen, near Mayen, Eifel Mts, Rhineland-Palatinate, Germany.Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag

Bellbergite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:1.20718

Help on Cell Dimensions: Cell Dimensions:

a = 13.244, c = 15.988, Z = 1; V = 2,428.64 Den(Calc)= 2.20

Help on Crystal System: Crystal System:

HexagonalSpace Group: P 63/mmc, P 62c-, P 63mc

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.8(1), 6.58(0.8), 2.21(0.7),2.95(0.7), 1.83(0.5), 2.5(0.5), 2.7(0.5),

Click Here for Large Bellbergite Structure Window Crystal Structure:

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| | Ruedinger B , Tillmanns E , Hentschel G , Mineralogy and Petrology , 48 (1993) p.147-152, Bellbergite - a new mineral with the zeolite structure type EAB | | ------------------------------------------------------------------------------------------------------------------------------------------------------------ |

Physical Properties of Bellbergite

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Colorless, White.

Help on Density: Density:

2.2

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Help on Habit: Habit:

Pyramidal - Crystals are shaped like pyramids.

Help on Hardness: Hardness:

5 - Apatite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Bellbergite

Help on Dichroism (e): Dichroism (e):

none.

Help on Dichroism (w): Dichroism (w):

none.

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.045 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2339,KPDmeas= 0.2339,KC= 0.2237
Ncalc = 1.49

Help on Optical Data: Optical Data:

Uniaxial (-), e=1.507, w=1.522, bire=0.0150.

Calculated Properties of Bellbergite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.20 gm/cc
note: Specific Gravity of Bellbergite =2.20 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PEBellbergite = 14.11 barns/electron
U=PEBellbergite x relectron= 31.06 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 22.83 (Gamma Ray American Petroleum Institute Units)
Concentration of Bellbergite per GRapi unit = 4.38 (%)

Estimated Radioactivity from Bellbergite - barely detectable

Bellbergite Classification

Help on Dana Class: Dana Class:

77.01.08.01 (77)Tectosilicate Zeolite group

(77.01)true zeolites

(77.01.08)Unclassified zeolite species

77.01.08.01 Bellbergite (K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72•30(H2O) P 63/mmc, P 62c-, P 63mc Hex

77.01.08.02 Tschernichite (Ca,Na)(Si6Al2)O16•4-8(H2O) P 4/mmm 4/m 2/m 2/m

Help on Strunz Class: Strunz Class:

09.GD.20 09 - SILICATES (Germanates)

09.G - Tektosilicates with Zeolitic H2O

09.GD -Chains of 6-membered rings � tabular zeolites

09.GD.20 Bellbergite (K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72•30(H2O) P 63/mmc, P 62c-, P 63mc Hex

09.GD.20 Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m

09.GD.20 Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m

09.GD.20 Erionite-Na (Na2,K2,Ca)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m

Other Bellbergite Information

Help on References: References:

NAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

Help on See Also: See Also:

Links to other databases for Bellbergite :
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

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Ask about Bellbergite here :
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Print or Cut-and-Paste your Bellbergite Specimen Label here :

Bellbergite

(K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72•30(H2O)
Dana No: 77.01.08.01 Strunz No: 09.GD.20
Locality:

Notes: