Clinobarylite Mineral Data (original) (raw)

General Clinobarylite Information

Help on Chemical Formula: Chemical Formula:

BaBe2Si2O7

Help on Composition: Composition:

Molecular Weight = 327.37 gm

Barium 43.21 % Ba 48.24 % BaO

Beryllium 5.42 % Be 15.05 % BeO

Silicon 17.16 % Si 36.71 % SiO2

Oxygen 34.21 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Ba1.03Be1.97(Si2O7)

Help on Environment: Environment:

Alkaline pegmatite veins at Yukspor Mountain. Dimorphous with barylite; structure determined. Possible polytype barylite-2O.

Help on IMA Status: IMA Status:

Approved IMA 2003 (Dana # Added)

Help on Locality: Locality:

Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Non-orthogonal dimorph of barylite.

Help on Synonym: Synonym:

IMA2002-015

Clinobarylite Image

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

Click Here for Larger Clinobarylite Image Clinobarylite Comments: Radiating group of colorless flattened bladed clinobarylite crystals. Location: Hackmann Valley, Yukspor Mountain, Khibiny, Kola, Russia.Scale: See Image. © Rruff Database

Clinobarylite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =2.3669:1:0.9496

Help on Cell Dimensions: Cell Dimensions:

a = 11.65, b = 4.922, c = 4.674, Z = 2; V = 268.01 Den(Calc)= 4.06

Help on Crystal System: Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmn2

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.458(1)(020), 2.929(0.58)(211), 3.388(0.56)(011),2.335(0.48)(002), 3.249(0.45)(111,111), 2.986(0.28)(301), 3.042(0.26)(310), 2.077(0.23)(320,112), 2.404(0.22)(120),

Click Here for Large Clinobarylite Structure Window Crystal Structure:

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Help on Above

| | Krivovichev S V , Yakovenchuk V N , Armbruster T , Mikhailova Y , Pakhomovsky Y A , Neues Jahrbuch fur Mineralogie, Monatshefte , 2004 (2004) p.373-384, Clinobarylite, BaBe2Si2O7: Structure refinement, and revision of symmetry and, physical properties, Locality: Khibina alkaline massif, Kola Peninsula, Russia | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Clinobarylite

Help on Cleavage: Cleavage:

{100} Perfect, {001} Very Good, {101} Very Good

Help on Color: Color:

Colorless.

Help on Density: Density:

3.97

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Aggregates - Made of numerous individual crystals or clusters.

Help on Habit: Habit:

Platy - Sheet forms (e.g. micas).

Help on Habit: Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Help on Hardness: Hardness:

6.5 - Pyrite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Clinobarylite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1727,KPDmeas= 0.1767,KC= 0.1742
Ncalc = 1.69 - 1.71

Help on Optical Data: Optical Data:

Biaxial (+), a=1.695-1.698, b=1.7-1.702, g=1.705-1.708, bire=0.0100

Calculated Properties of Clinobarylite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.71 gm/cc
note: Specific Gravity of Clinobarylite =4.06 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.13
Boson Index = 0.87

Help on Photoelectric: Photoelectric:

PEClinobarylite = 190.30 barns/electron
U=PEClinobarylite x rElectron Density= 705.96 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Clinobarylite is Not Radioactive

Clinobarylite Classification

Help on Dana Class: Dana Class:

55.01.02.01 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions

(55.01)with cations in [4] and higher coordination

(55.01.02)Dana Group

55.01.02.01 Clinobarylite! BaBe2Si2O7 Pmn2 2/m 2/m 2/m

Help on Strunz Class: Strunz Class:

09.BB.15 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BB -Si2O7 groups, without non-tetrahedral anions;

09.BB.15 Barylite BaBe2Si2O7 Pn21a mm2

09.BB.15 Clinobarylite! BaBe2Si2O7 Pmn2 2/m 2/m 2/m

Other Clinobarylite Information

Help on References: References:

NAME( AmMin, 89:249) PHYS. PROP.(AmMin, 89:249, 90:522) OPTIC PROP.(AmMin, 89:249)

Help on See Also: See Also:

Links to other databases for Clinobarylite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Ask about Clinobarylite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

Print or Cut-and-Paste your Clinobarylite Specimen Label here :

Clinobarylite

BaBe2Si2O7
Dana No: 55.01.02.01 Strunz No: 09.BB.15
Locality:

Notes: