Dresserite Mineral Data

Dresserite Mineral Data +

General Dresserite Information

Chemical Formula:

BaAl2(CO3)2(OH)4·(H2O)

Composition:

Molecular Weight = 397.35 gm

Barium 34.56 % Ba 38.59 % BaO

Aluminum 13.58 % Al 25.66 % Al₂O₃

Hydrogen 1.52 % H 13.60 % H₂O

Carbon 6.05 % C 22.15 % CO₂

Oxygen 44.29 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaAl₂(CO₃)₂(OH)₄·(H₂O)

IMA Status:

Approved IMA 1970

Locality:

Link to MinDat.org Location Data.

Synonym:

IMA1968-027

Dresserite Image

Images:

Dresserite

Comments: Radiating spheres of dresserite on matrix.
Location: Francon Quarry, Montreal, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Dresserite

Comments: White divergent sprays of fibrous crystals dresserite crystals.
Location: Francon quarry, Montr?al, Jacques Cartier Co., Qu?bec, Canada. Scale: Crystal size 5mm.
© Tom Loomis / Dakota Matrix

Dresserite Crystallography

Axial Ratios:

a:b:c =0.5508:1:0.3345

Cell Dimensions:

a = 9.27, b = 16.83, c = 5.63, Z = 4; V = 878.36 Den(Calc)= 3.00

Crystal System:

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

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

By Intensity(I/I_o): 8.09(1), 6.23(0.6), 3.66(0.5),

Physical Properties of Dresserite

Color:

White.

Density:

2.96

Diaphaniety:

Transparent

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Vitreous - Silky

Streak:

white

Optical Properties of Dresserite

Gladstone-Dale:

CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1865,KPDmeas= 0.189,KC= 0.1955

Optical Data:

Biaxial (-), a=1.518, g=1.601, bire=0.0830, 2V(Meas)=30-40.

Calculated Properties of Dresserite

Electron Density:

r_electron=2.80 gm/cc
note: r_Dresserite=2.96 gm/cc.

Fermion Index

Fermion Index = 0.06247
Boson Index = 0.93753

Photoelectric:

PE_Dresserite= 146.94 barns/electron
U=PE_Dresserite x r_electron= 411.57 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Dresserite is Not Radioactive

Dresserite Classification

Dana Class:

16b.2.1.2 (16b)Carbonates - Hydroxyl or Halogen

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

(16b.2.1)Dana Group

16b.2.1.1 Dundasite PbAl2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

16b.2.1.2 Dresserite BaAl2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

16b.2.1.3 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

16b.2.1.4 Petterdite! PbCr2(CO3)2(OH)4·H2O Pbnm 2/m 2/m 2/m

16b.2.1.5 Kochsandorite! CaAl2(CO3)2(OH)4·H2O P nma 2/m 2/m 2/m

Strunz Class:

V/E.08-60 V - Nitrates, Carbonates and Borates

V/E - Water-bearing carbonates with unfamiliar anions

V/E.08 - Strontiodresserite - Dundasite series

V/E.08-05 Thomasclarkite-(Y)! (Na,Ce)(Y,REE)(HCO3)(OH)3·4(H2O) P 2 2

V/E.08-10 Kamphaugite-(Y) Ca(Y,REE)(CO3)2(OH)2·3(H2O) P 4₁2₁2 4 2 2

V/E.08-20 Calcio-ancylite-(Ce) CaCe(CO3)2(OH)·(H2O) P mmm 2/m 2/m 2/m

V/E.08-25 Calcio-ancylite-(Nd) CaNd(CO3)2(OH)·(H2O) Pm m

V/E.08-28 Ancylite-(La)! Sr(La,Ce)(CO3)2(OH)·(H2O) Pmcn 2/m 2/m 2/m

V/E.08-30 Ancylite-(Ce) SrCe(CO3)2(OH)·(H2O) Pmcn 2/m 2/m 2/m

V/E.08-40 Gysinite-(Nd) Pb(Nd,La)(CO3)2(OH)·(H2O) Pmcn 2/m 2/m 2/m

V/E.08-50 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

V/E.08-60 Dresserite BaAl2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

V/E.08-70 Hydrodresserite BaAl2(CO3)2(OH)4·3(H2O) P1 1

V/E.08-80 Montroyalite Sr4Al8(CO3)3(OH,F)26·10-11(H2O) Unk. Tri

V/E.08-90 Dundasite PbAl2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

V/E.08-95 Petterdite! PbCr2(CO3)2(OH)4·H2O Pbnm 2/m 2/m 2/m

V/E.08-100 Barstowite Pb4(CO3)Cl6·(H2O) P 2₁/m 2/m

Other Dresserite Information

References:

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

See Also:

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

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Dresserite

BaAl2(CO3)2(OH)4·(H2O)
Dana No: 16b.2.1.2 Strunz No: V/E.08-60
Locality:

Notes: