Alumino-magnesiohulsite Mineral Data

Alumino-magnesiohulsite Mineral Data

General Alumino-magnesiohulsite 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:

IMA2002-038

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Alumino-magnesiohulsite 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 Alumino-magnesiohulsite

Color:

Brown.

Diaphaniety:

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 Alumino-magnesiohulsite

Gladstone-Dale:

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

Optical Data:

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

Calculated Properties of Alumino-magnesiohulsite

Electron Density:

r_electron=3.69 gm/cc
note: r_{Alumino-magnesiohulsite}=3.82 gm/cc.

Fermion Index

Fermion Index = 0.05215
Boson Index = 0.94785

Photoelectric:

PE_{Alumino-magnesiohulsite}= 32.59 barns/electron
U=PE_{Alumino-magnesiohulsite} x r_electron= 120.14 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Alumino-magnesiohulsite is Not Radioactive

Alumino-magnesiohulsite Classification

Dana Class:

24.2.3.3 (24)Borates - Anhydrous

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

(24.2.3)Dana Group

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

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

24.2.3.3 Alumino-magnesiohulsite ! Mg2(Al,Mg,Sn)(BO3)O2 P 2/m 2/m

Strunz Class:

V/G.03-25 V - Nitrates, Carbonates and Borates

V/G - "Insel" borates [BO3]3- "inseln"

V/G.03 - Warwickite - Hulsite series

V/G.03-05 Pertsevite! Mg2(BO3)F P na2₁ mm2

V/G.03-10 Warwickite Mg(Ti,Fe,Al)(BO3)O Pnam 2/m 2/m 2/m

V/G.03-15 Yuanfuliite (Mg,Fe)(Fe,Al,Mg,Ti,Fe)(BO3)O Pnam 2/m 2/m 2/m

V/G.03-20 Pinakiolite Mg2MnO2(BO3) C 2/m 2/m

V/G.03-25 Alumino-magnesiohulsite Mg2(Al,Mg,Sn)(BO3)O2 P 2/m 2/m

V/G.03-30 Magnesiohulsite (Mg,Fe)2(Mg,Fe,Sn)O2(BO3) P 2/m 2/m

V/G.03-40 Hulsite (Fe,Mg)2(Fe,Sn)O2(BO3) P 2/m 2/m

Other Alumino-magnesiohulsite Information

References:

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

See Also:

Links to other databases for Alumino-magnesiohulsite :
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

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Alumino-magnesiohulsite

Mg2(Al,Mg,Sn)(BO3)O2
Dana No: 24.2.3.3 Strunz No: V/G.03-25
Locality:

Notes: