Hulsite Mineral Data

Hulsite Mineral Data +

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General Hulsite Information

Chemical Formula:

(Fe++,Mg)2(Fe+++,Sn)O2(BO3)

Composition:

Molecular Weight = 233.09 gm

Magnesium 10.43 % Mg 17.29 % MgO

Iron 45.52 % Fe 30.82 % FeO / 30.83 % Fe₂O₃

Tin 5.09 % Sn 6.47 % SnO₂

Boron 4.64 % B 14.93 % B₂O₃

Oxygen 34.32 % O

______ ______

100.00 % 100.34 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺MgFe³⁺_0.9Sn_0.1O₂(BO₃)

Environment:

Metamorphosed limestone at a granite contact.

IMA Status:

Valid Species (Pre-IMA) 1908

Locality:

Brooks mountain, Seward peninsula, Alaska. Link to MinDat.org Location Data.

Name Origin:

Named for Alfred Hulse Brooks (1871-1924), U. S. Geologist.

Synonym:

ICSD 12133

PDF 17-511

Hulsite Image

Images:

Hulsite

Comments: Black crystalline granular massive hulsite.
Location: Brooks Range, Seward Peninsula, Alaska, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hulsite Crystallography

Axial Ratios:

a:b:c =3.4477:1:1.7508

Cell Dimensions:

a = 10.695, b = 3.102, c = 5.431, Z = 2; beta = 94.21° V = 179.69 Den(Calc)= 4.31

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): 2.664(1), 2.585(0.7), 5.35(0.7),

Crystal Structure:

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Konnert J A , Appleman D E , Clark J R , Finger L W , Kato T , Miura Y , American Mineralogist , 61 (1976) p.116-122, Crystal structure and cation distribution of hulsite, a tin-iron borate

Physical Properties of Hulsite

Cleavage:

[110] Good

Color:

Black.

Density:

4.3

Diaphaniety:

Opaque

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3 - Calcite

Luminescence:

Non-fluorescent.

Luster:

Sub Metallic

Streak:

black

Calculated Properties of Hulsite

Electron Density:

r_electron=4.12 gm/cc
note: r_Hulsite=4.31 gm/cc.

Fermion Index

Fermion Index = 0.03793
Boson Index = 0.96207

Photoelectric:

PE_Hulsite= 28.80 barns/electron
U=PE_Hulsite x r_electron= 118.64 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hulsite is Not Radioactive

Hulsite Classification

Dana Class:

24.2.3.1 (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.03-40 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 Hulsite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Hulsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - HyperPhysics
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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

Hulsite

(Fe++,Mg)2(Fe+++,Sn)O2(BO3)
Dana No: 24.2.3.1 Strunz No: V/G.03-40
Locality:

Notes: