Boussingaultite Mineral Data

Boussingaultite Mineral Data +

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General Boussingaultite Information

Chemical Formula:

(NH4)2Mg(SO4)2·6(H2O)

Composition:

Molecular Weight = 360.60 gm

Magnesium 6.74 % Mg 11.18 % MgO

Hydrogen 2.24 % H - % Calc as (NH₄)₂O

Hydrogen 3.35 % H 29.98 % H₂O

Sulfur 17.78 % S 44.41 % SO₃

Nitrogen 7.77 % N 14.44 % (NH₄)₂O

Oxygen 62.12 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

(NH₄)₂Mg(SO₄)₂·6(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1864

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 25713

PDF 35-771

Boussingaultite Image

Images:

Boussingaultite

Comments: White, crystalline aggregates boussingaultite.
Location: Anna Mine, Alsdorf, Aachen, North Rhine-Westphalia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Boussingaultite Crystallography

Axial Ratios:

a:b:c =0.7382:1:0.4932

Cell Dimensions:

a = 9.28, b = 12.57, c = 6.2, Z = 2; beta = 107.1° V = 691.26 Den(Calc)= 1.73

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 4.22(1), 2.085(0.95), 5.11(0.85),

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
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Margulis T N , Templeton D H , Zeitschrift fur Kristallographie , 117 (1962) p.344-357, Crystal structure and hydrogen bonding of magnesium ammonium sulfate, hexahydrate

Physical Properties of Boussingaultite

Cleavage:

[???] Perfect, [???] Distinct

Color:

Colorless, Yellow pink, Light yellow, Pink.

Density:

1.7

Diaphaniety:

Transparent

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Boussingaultite

Gladstone-Dale:

CI meas= -0.376 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.352 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2742,KPDmeas= 0.2791,KC= 0.2029

Optical Data:

Biaxial (+), a=1.4716, b=1.473, g=1.4786, bire=0.0070

Calculated Properties of Boussingaultite

Electron Density:

r_electron=1.82 gm/cc
note: r_{Boussingaultite}=1.73 gm/cc.

Fermion Index

Fermion Index = 0.08577
Boson Index = 0.91423

Photoelectric:

PE_{Boussingaultite}= 1.31 barns/electron
U=PE_{Boussingaultite} x r_electron= 2.40 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Boussingaultite is Not Radioactive

Boussingaultite Classification

Dana Class:

29.3.7.2 (29)Hydrated Acid and Sulfates

(29.3)where (A+)2 B (XO4)2 · x(H2O)

(29.3.7)Dana Group

29.3.7.1 Mohrite (NH4)2Fe(SO4)2·6(H2O) P 2₁/c 2/m

29.3.7.2 Boussingaultite (NH4)2Mg(SO4)2·6(H2O) P 2₁/a 2/m

29.3.7.3 Nickel-boussingaultite (NH4)2(Ni,Mg)(SO4)2·6(H2O) P 2₁/a 2/m

Strunz Class:

VI/C.19-30 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium and very big size

VI/C.19 - Picromerite group

VI/C.19-10 Picromerite K2Mg(SO4)2·6(H2O) P 2₁/a 2/m

VI/C.19-20 Cyanochroite K2Cu(SO4)2·6(H2O) P 2₁/a 2/m

VI/C.19-30 Boussingaultite (NH4)2Mg(SO4)2·6(H2O) P 2₁/a 2/m

VI/C.19-40 Nickel-boussingaultite (NH4)2(Ni,Mg)(SO4)2·6(H2O) P 2₁/a 2/m

VI/C.19-50 Mohrite (NH4)2Fe(SO4)2·6(H2O) P 2₁/c 2/m

Other Boussingaultite 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 Boussingaultite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Boussingaultite

(NH4)2Mg(SO4)2·6(H2O)
Dana No: 29.3.7.2 Strunz No: VI/C.19-30
Locality:

Notes: