Bavenite Mineral Data (original) (raw)
General Bavenite Information
Ca4Be2Al2Si9O26(OH)2
Molecular Weight = 931.22 gm
Calcium 17.65 % Ca 24.69 % CaO
Beryllium 2.81 % Be 7.79 % BeO
Aluminum 3.48 % Al 6.57 % Al2O3
Silicon 27.75 % Si 59.36 % SiO2
Hydrogen 0.22 % H 1.93 % H2O
Oxygen 48.11 % O
______ ______
100.00 % 100.34 % = TOTAL OXIDE
Ca4.1Be2.9Al1.2Si9.2O26(OH)2
Pegmatitic druses in granite formed from the alteration of beryllium-bearing minerals.
Valid Species (Pre-IMA) 1901
Baveno, Lago Maggiore, Piedmont, Italy. Link to MinDat.org Location Data.
Named after its locality.
ICSD 28093
PDF 915-535
Bavenite Image
Bavenite Crystallography
a:b:c =0.8361:1:0.2158
a = 19.39, b = 23.19, c = 5.005, Z = 4; V = 2,250.52 Den(Calc)= 2.75
Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Am2a
By Intensity(I/Io): 3.74(1), 3.35(0.9), 3.24(0.8),3.05(0.7), 3.13(0.7), 2.56(0.6), 4.19(0.5),
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| | Cannillo E , Coda A , Fagnani G , Acta Crystallographica , 20 (1966) p.301-309, The crystal structure of bavenite | | -------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Bavenite
{001} Perfect, {100} Fair
White, Green, Pink, Brown.
2.7
Transparent to translucent
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Lamellar - Thin laminae producing a lamellar structure.
Massive - Lamellar - Distinctly foliated fine-grained forms.
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
5.5 - Knife Blade
Vitreous - Pearly
white
Optical Properties of Bavenite
CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2124,KPDmeas= 0.2164,KC= 0.2142
Ncalc = 1.58 - 1.59
Biaxial (+), a=1.578-1.586, b=1.579-1.586, g=1.583-1.593, bire=0.0050-0.0070, 2V(Calc)=0-54, 2V(Meas)=22-60.
Calculated Properties of Bavenite
Bulk Density (Electron Density)=2.74 gm/cc
note: Specific Gravity of Bavenite =2.75 gm/cc.
Fermion Index = 0.04
Boson Index = 0.96
PEBavenite = 3.36 barns/electron
U=PEBavenite x rElectron Density= 9.22 barns/cc.
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bavenite is Not Radioactive
Bavenite Classification
70.05.03.01 (70)Inosilicate Column or Tube Structures
(70.05)with chains linked by Be
(70.05.03)Dana Group
70.05.03.01 Bavenite Ca4Be2Al2Si9O26(OH)2 Am2a mm2
09.DF.25 09 - SILICATES (Germanates)
09.D - Inosilicates* Structural terminology according to Liebau (1985)
09.DF -Inosilicates with 2-periodic multiple chains
09.DF.25 Bavenite Ca4Be2Al2Si9O26(OH)2 Am2a mm2
Other Bavenite Information
NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Links to other databases for Bavenite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
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Ask about Bavenite here :
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Print or Cut-and-Paste your Bavenite Specimen Label here :
Bavenite
Ca4Be2Al2Si9O26(OH)2
Dana No: 70.05.03.01 Strunz No: 09.DF.25
Locality:
Notes: