Hydrodresserite Mineral Data

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:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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 - 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

Search for Hydrodresserite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Hydrodresserite :

A Bijoux Google Search for Hydrodresserite
Adam's Minerals Google Search for Hydrodresserite
Cape Minerals Google Search for Hydrodresserite
Dakota Matrix Minerals Google Search for Hydrodresserite
Excalibur Mineral Corp. Google Search for Hydrodresserite
Exceptional Minerals Google Search for Hydrodresserite
John Betts Fine Minerals Search for Hydrodresserite
McDougall Minerals Google Search for Hydrodresserite
Mineral News Website Link
Rock and Mineral Shows Google Search for Hydrodresserite
Weinrich Minerals, Inc. Google Search for Hydrodresserite

Ask about Hydrodresserite 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 Español

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: