Aluminomagnesiohulsite Mineral Data

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General Aluminomagnesiohulsite Information

Chemical Formula:

Mg2(Al,Mg,Sn)(BO3)O2

Composition:

Molecular Weight = 195.24 gm

Magnesium 21.41 % Mg 35.51 % MgO

Titanium 0.49 % Ti 0.82 % TiO₂

Manganese 0.28 % Mn 0.36 % MnO

Aluminum 8.71 % Al 16.45 % Al₂O₃

Iron 12.87 % Fe 16.56 % FeO

Tin 9.73 % Sn 12.35 % SnO₂

Boron 5.54 % B 17.83 % B₂O₃

Oxygen 40.97 % O

______ ______

100.00 % 99.88 % = TOTAL OXIDE

Empirical Formula:

Mg_1.55Fe²⁺_0.45Al_0.63Mg_0.17Mn²⁺_0.01Ti_0.02Sn_0.16O₂(BO₃)

Environment:

Occurs in Paleozoic kotoite marble in the contact zone of a Mesozoic granosyenite massif. Hulsite group; structure determined.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Near the mouth of Kebirin’ya Creek, a northern tributary of the Dogdo River, some 250 km east of Verkhoyansk, Republic of Sakha-Yakutia, Russia Link to MinDat.org Location Data.

Name Origin:

Named as the Al and Mg dominant member of the hulsite group.

Synonym:

Alumino-magnesiohulsite - Renamed Aluminomagnesiohulsite by Mineralogical Record, v39 (2008), p131

IMA2002-038

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Aluminomagnesiohulsite Crystallography

Axial Ratios:

a:b:c =1.7638:1:3.4673

Cell Dimensions:

a = 5.3444, b = 3.03, c = 10.506, Z = 2; beta = 94.46° V = 169.61 Den(Calc)= 3.82

Crystal System:

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

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

By Intensity(I/I_o): 2.532(1), 2.001(0.54), 2.618(0.5),5.24(0.49), 4.9(0.32), 2.318(0.3), 10.47(0.29), 1.515(0.28),

Crystal Structure:

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Pertsev N N , Schreyer W , Armbruster T , Bernhardt H J , Medenbach O , European Journal of Mineralogy , 16 (2004) p.151-161, Alumino-magnesiohulsite, a new member of the hulsite group, in kotoite marble from, east of Verkhoyansk, Sakha-Yakutia, Russia, Locality: east of Verkhoyansk, Sakha-Yakutia, Russia

Physical Properties of Aluminomagnesiohulsite

Color:

Brown.

Diaphaneity:

Transparent

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Luster:

Vitreous (Glassy)

Optical Properties of Aluminomagnesiohulsite

Gladstone-Dale:

CI calc= -0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2083,KC= 0.1961
Ncalc = 1.75

Optical Data:

Biaxial (+), a=1.78, b=1.802, g=1.805, bire=0.0250

Calculated Properties of Aluminomagnesiohulsite

Electron Density:

Bulk Density (Electron Density)=3.69 gm/cc
note: Specific Gravity of Aluminomagnesiohulsite =3.82 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_{Aluminomagnesiohulsite}= 32.59 barns/electron
U=PE_{Aluminomagnesiohulsite} x rElectron Density= 120.14 barns/cc.

Radioactivity:

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

Aluminomagnesiohulsite Classification

Dana Class:

24.02.03.03 (24)Borates - Anhydrous

(24.02)where (A)2 BO2 [XO3]

(24.02.03)Dana Group

24.02.03.01 Hulsite (Fe,Mg)2(Fe,Sn)O2(BO3) P 2/m 2/m

24.02.03.02 Magnesiohulsite (Mg,Fe)2(Mg,Fe,Sn)O2(BO3) P 2/m 2/m

24.02.03.03 Aluminomagnesiohulsite! Mg2(Al,Mg,Sn)(BO3)O2 P 2/m 2/m

Strunz Class:

06.AB.45 06 - BORATES

06.A - Monoborates

06.AB -BO3, with additional anions; 1(D) + OH, etc.

06.AB.45 Hulsite (Fe,Mg)2(Fe,Sn)O2(BO3) P 2/m 2/m

06.AB.45 Magnesiohulsite (Mg,Fe)2(Mg,Fe,Sn)O2(BO3) P 2/m 2/m

06.AB.45 Aluminomagnesiohulsite! Mg2(Al,Mg,Sn)(BO3)O2 P 2/m 2/m

Other Aluminomagnesiohulsite Information

References:

NAME( AmMin 89:1574) PHYS. PROP.(AmMin 89:1574) OPTIC PROP.(AmMin 89:1574)

See Also:

Links to other databases for Aluminomagnesiohulsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

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Aluminomagnesiohulsite

Mg2(Al,Mg,Sn)(BO3)O2
Dana No: 24.02.03.03 Strunz No: 06.AB.45
Locality:

Notes: