Brugnatellite Mineral Data

Brugnatellite Mineral Data +

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General Brugnatellite Information

Chemical Formula:

Mg6Fe+++(CO3)(OH)13·4(H2O)

Composition:

Molecular Weight = 554.84 gm

Magnesium 26.28 % Mg 43.58 % MgO

Iron 10.07 % Fe 14.39 % Fe₂O₃

Hydrogen 3.81 % H 34.09 % H₂O

Carbon 2.16 % C 7.93 % CO₂

Oxygen 57.67 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₆Fe³⁺(CO₃)(OH)₁₃·4(H₂O)

Environment:

In serpentinites.

IMA Status:

Valid Species (Pre-IMA) 1909

Locality:

Asbestos mine at Torre Santa Maria, Val Malenco. Lombardy, Italy. Link to MinDat.org Location Data.

Name Origin:

Named after Luigi Brugnatelli (1859-1928), mineralogist, University of Pavia, Italy.

Brugnatellite Image

Images:

Brugnatellite

Comments: Botryoidal brugnatellite.
Location: Monte Ramazzo, Liguria, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Brugnatellite Crystallography

Axial Ratios:

a:c = 1:2.9197

Cell Dimensions:

a = 5.48, c = 16, Z = 1; V = 416.11 Den(Calc)= 2.21

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 7.93(1), 3.96(0.9), 2(0.7),

Physical Properties of Brugnatellite

Cleavage:

[0001] Perfect

Color:

Brown white, Brownish pink, Yellow brown, Pink.

Density:

2.14

Diaphaniety:

Transparent

Habit:

Massive - Lamellar - Distinctly foliated fine-grained forms.

Habit:

Micaceous - Platy texture with "flexible" plates.

Hardness:

2 - Gypsum

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Brugnatellite

Gladstone-Dale:

CI meas= 0.075 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.104 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2376,KPDmeas= 0.2453,KC= 0.2652

Optical Data:

Uniaxial (-), e=1.51, w=1.54, bire=0.0300.

Calculated Properties of Brugnatellite

Electron Density:

r_electron=2.20 gm/cc
note: r_{Brugnatellite}=2.14 gm/cc.

Fermion Index

Fermion Index = 0.02893
Boson Index = 0.97107

Photoelectric:

PE_{Brugnatellite}= 3.57 barns/electron
U=PE_{Brugnatellite} x r_electron= 7.85 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Brugnatellite is Not Radioactive

Brugnatellite Classification

Dana Class:

16b.7.5.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.7)Dana Type

(16b.7.5)Dana Group

16b.7.5.1 Brugnatellite Mg6Fe(CO3)(OH)13·4(H2O) P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

V/E.01-70 V - Nitrates, Carbonates and Borates

V/E - Water-bearing carbonates with unfamiliar anions

V/E.01 - Hydromagnesite - Brugnatellite series

V/E.01-10 Hydromagnesite Mg5(CO3)4(OH)2·4(H2O) P 2₁/c 2/m

V/E.01-15 Widgiemoolthalite (Ni,Mg)5(CO3)4(OH)2·4-5(H2O) P 2₁/c 2/m

V/E.01-20 Dypingite Mg5(CO3)4(OH)2·5(H2O) Unk. Mono

V/E.01-30 Giorgiosite Mg5(CO3)4(OH)2·5(H2O) ? Mono

V/E.01-40 Artinite Mg2(CO3)(OH)2·3(H2O) C 2 or C 2/m Mono

V/E.01-50 Indigirite Mg2Al2(CO3)4(OH)2·15(H2O) Unk. Mono

V/E.01-60 Coalingite Mg10Fe2(CO3)(OH)24·2(H2O) R 3c 3 2/m

V/E.01-70 Brugnatellite Mg6Fe(CO3)(OH)13·4(H2O) P 6₃/mmc 6/m 2/m 2/m

Other Brugnatellite Information

References:

NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Brugnatellite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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

Brugnatellite

Mg6Fe+++(CO3)(OH)13·4(H2O)
Dana No: 16b.7.5.1 Strunz No: V/E.01-70
Locality:

Notes: