Manasseite Mineral Data

Manasseite Mineral Data +

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General Manasseite Information

Chemical Formula:

Mg6Al2(CO3)(OH)16·4(H2O)

Composition:

Molecular Weight = 603.98 gm

Magnesium 24.14 % Mg 40.04 % MgO

Aluminum 8.93 % Al 16.88 % Al₂O₃

Hydrogen 4.01 % H 35.79 % H₂O

Carbon 1.99 % C 7.29 % CO₂

Oxygen 60.93 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₆Al₂(CO₃)(OH)₁₆·4(H₂O)

Environment:

In iron ore skarns.

IMA Status:

Valid Species (Pre-IMA) 1941

Locality:

Kongsberg, Norway. Link to MinDat.org Location Data.

Name Origin:

Named for Ernesto Manasse (1875-1922), mineralogist of Florence, Italy.

Synonym:

ICSD 82874

PDF 20658

Manasseite Image

Images:

Manasseite

Comments: Brownish yellow crystal of manasseite on dolomite matrix.
Location: Jacupiranga mine, Jacupiranga, Sao Paolo, Brazil. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Manasseite Crystallography

Axial Ratios:

a:c = 1:2.50392

Cell Dimensions:

a = 6.12, c = 15.324, Z = 1; V = 497.06 Den(Calc)= 2.02

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): 7.67(1), 1.84(0.6), 2.6(0.5),

Physical Properties of Manasseite

Cleavage:

[0001] Perfect

Color:

Bluish white, Brownish white, Grayish, White, Light bluish.

Density:

2.05

Diaphaniety:

Transparent

Fracture:

Flexible - Flexible fragments.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Hardness:

2 - Gypsum

Luster:

Pearly

Streak:

white

Optical Properties of Manasseite

Gladstone-Dale:

CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2559,KPDmeas= 0.2522,KC= 0.2521

Optical Data:

Uniaxial (-), e=1.51, w=1.524, bire=0.0140.

Calculated Properties of Manasseite

Electron Density:

r_electron=2.12 gm/cc
note: r_Manasseite=2.05 gm/cc.

Fermion Index

Fermion Index = 0.02466
Boson Index = 0.97534

Photoelectric:

PE_Manasseite= 0.92 barns/electron
U=PE_Manasseite x r_electron= 1.95 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Manasseite is Not Radioactive

Manasseite Classification

Dana Class:

16b.6.1.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.6)Dana Type

(16b.6.1)Sjorgrenite-Hydrotalcite Group (Sojogrenite Subgroup:Hexagonal)

16b.6.1.1 Manasseite Mg6Al2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

16b.6.1.2 Barbertonite Mg6Cr2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

16b.6.1.3 Sjogrenite Mg6Fe2(CO3)(OH)14·5(H2O) P 6₃/mmc 6/m 2/m 2/m

16b.6.1.4 Zaccagnaite! Zn4Al2(OH)12(CO3)·3(H2O) P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

V/E.02-10 V - Nitrates, Carbonates and Borates

V/E - Water-bearing carbonates with unfamiliar anions

V/E.02 - Manasseite group

V/E.02-05 Quintinite-2H Mg4Al2(OH)12CO3·4(H2O) P 6₃22 6 2 2

V/E.02-05* Quintinite-3T Mg4Al2(OH)12CO3·4(H2O) P 3₁12,P 3₂12 3 2

V/E.02-07 Caresite Fe4Al2(OH)12CO3·3(H2O) P 3₁12 or P 3₂12 3 2

V/E.02-08 Charmarite-2H Mn4Al2(CO3)(OH)12·3(H2O) P 6₃22 6 2 2

V/E.02-08* Charmarite-3T Mn4Al2(CO3)(OH)12·3(H2O) P 3₁12 3 2

V/E.02-09 Zaccagnaite! Zn4Al2(OH)12(CO3)·3(H2O) P 6₃/mmc 6/m 2/m 2/m

V/E.02-10 Manasseite Mg6Al2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

V/E.02-20 Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)·2(H2O) P 6/mcm, P 6cm, P 6c2 Hex

V/E.02-30 Barbertonite Mg6Cr2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

V/E.02-40 Sjogrenite Mg6Fe2(CO3)(OH)14·5(H2O) P 6₃/mmc 6/m 2/m 2/m

Other Manasseite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Manasseite :
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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Manasseite

Mg6Al2(CO3)(OH)16·4(H2O)
Dana No: 16b.6.1.1 Strunz No: V/E.02-10
Locality:

Notes: