Brugnatellite Mineral Data

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.

Name Pronunciation:

Brugnatellite + Pronunciation

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 Dipyramidal H-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

Diaphaneity:

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
Ncalc = 1.57 - 1.59

Optical Data:

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

Calculated Properties of Brugnatellite

Electron Density:

Bulk Density (Electron Density)=2.20 gm/cc
note: Specific Gravity of Brugnatellite =2.14 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

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

Radioactivity:

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

Brugnatellite Classification

Dana Class:

16b.07.05.01 (16b)Carbonates - Hydroxyl or Halogen

(16b.07)Dana Type

(16b.07.05)Dana Group

16b.07.05.01 Brugnatellite Mg6Fe(CO3)(OH)13•4(H2O) P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

05.DA.45 05 - CARBONATES (NITRATES)

05.D - Carbonates with Additional Anions, with H2O

05.DA -With medium-sized cations

05.DA.45 Brugnatellite Mg6Fe(CO3)(OH)13•4(H2O) P 6₃/mmc 6/m 2/m 2/m

05.DA.45 Barbertonite Mg6Cr2(CO3)(OH)16•4(H2O) P 6₃/mmc 6/m 2/m 2/m

05.DA.45 Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)•2(H2O) P 6/mcm, P 6cm, P 6c2 Hex

05.DA.45 Zaccagnaite! Zn4Al2(OH)12(CO3)•3(H2O) P 6₃/mmc 6/m 2/m 2/m

05.DA.45 Manasseite Mg6Al2(CO3)(OH)16•4(H2O) P 6₃/mmc 6/m 2/m 2/m

05.DA.45 Sjogrenite Mg6Fe2(CO3)(OH)16•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 - 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

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

Brugnatellite

Mg6Fe+++(CO3)(OH)13•4(H2O)
Dana No: 16b.07.05.01 Strunz No: 05.DA.45
Locality:

Notes:

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