Hydrodresserite Mineral Data

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General Hydrodresserite Information

Chemical Formula:

BaAl2(CO3)2(OH)4•3(H2O)

Composition:

Molecular Weight = 433.38 gm

Barium 31.69 % Ba 35.38 % BaO

Aluminum 12.45 % Al 23.53 % Al₂O₃

Hydrogen 2.33 % H 20.78 % H₂O

Carbon 5.54 % C 20.31 % CO₂

Oxygen 47.99 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaAl₂(CO₃)₂(OH)₄•3(H₂O)

Environment:

Vugs in metamorphosed limestone, near the contact zone of a dawsonite-rich silicocarbonatite sill.

IMA Status:

Approved IMA 1977

Locality:

Francon quarry, Montreal Island, Montreal, Quebec, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for essential water and characteristic dehydration to dresserite under low humidity conditions.

Name Pronunciation:

Hydrodresserite + Pronunciation

Synonym:

ICSD 201349

IMA1976-036

PDF 29-145

Hydrodresserite Image

Images:

Click Here for Larger Hydrodresserite Image

Hydrodresserite Weloganite

Comments: White spherical aggregates of hydrodresserite with radiating structure with columnar weloganite.
Location: Francon Quarry, Montreal, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hydrodresserite Crystallography

Axial Ratios:

a:b:c =0.9373:1:0.5411

Cell Dimensions:

a = 9.755, b = 10.407, c = 5.632, Z = 2; alpha = 95.695°, beta = 92.273°, gamma = 115.643° V = 512.50 Den(Calc)= 2.81

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 8.52(1), 3.42(0.7), 3.1(0.6),

Crystal Structure:

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Szymanski J T , The Canadian Mineralogist , 20 (1982) p.253-262, The crystal structure of hydrodresserite BaAl2(CO3)2(OH)4.3H2O

Physical Properties of Hydrodresserite

Cleavage:

{010} Perfect, {210} Perfect

Color:

Colorless, White.

Density:

2.8

Diaphaneity:

Transparent

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Hydrodresserite

Gladstone-Dale:

CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1998,KPDmeas= 0.2012,KC= 0.2075
Ncalc = 1.58 - 1.59

Optical Data:

Biaxial (-), a=1.501, b=1.594, g=1.595, bire=0.0940, 2V(Calc)=10, 2V(Meas)=17.

Calculated Properties of Hydrodresserite

Electron Density:

Bulk Density (Electron Density)=2.69 gm/cc
note: Specific Gravity of Hydrodresserite =2.80 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_{Hydrodresserite}= 132.85 barns/electron
U=PE_{Hydrodresserite} x rElectron Density= 357.05 barns/cc.

Radioactivity:

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

Hydrodresserite Classification

Dana Class:

16b.02.02.01 (16b)Carbonates - Hydroxyl or Halogen

(16b.02)where (A)m (B)n (XO3)p Zq · x(H2O), with (m+n):p=3:2

(16b.02.02)Dana Group

16b.02.02.01 Hydrodresserite BaAl2(CO3)2(OH)4•3(H2O) P1 1

Strunz Class:

05.DB.15 05 - CARBONATES (NITRATES)

05.D - Carbonates with Additional Anions, with H2O

05.DB -With large and medium-sized cations

05.DB.15 Hydrodresserite BaAl2(CO3)2(OH)4•3(H2O) P1 1

Other Hydrodresserite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Hydrodresserite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Hydrodresserite

BaAl2(CO3)2(OH)4•3(H2O)
Dana No: 16b.02.02.01 Strunz No: 05.DB.15
Locality:

Notes: