Warwickite Mineral Data

General Warwickite Information

Chemical Formula:

Mg(Ti,Fe+++,Al)(BO3)O

Composition:

Molecular Weight = 147.29 gm

Magnesium 16.50 % Mg 27.36 % MgO

Titanium 19.50 % Ti 32.54 % TiO₂

Aluminum 1.83 % Al 3.46 % Al₂O₃

Iron 11.37 % Fe 16.26 % Fe₂O₃

Boron 7.34 % B 23.63 % B₂O₃

Oxygen 43.45 % O

______ ______

100.00 % 103.26 % = TOTAL OXIDE

Empirical Formula:

MgTi_0.6Fe³⁺_0.3Al_0.1(BO₃)O

IMA Status:

Valid Species (Pre-IMA) 1838

Locality:

Southwest of Edenville, in the town of Warwick, Orange Co., New York. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Warwickite + Pronunciation

Synonym:

ICSD 8130

PDF 19-775

Warwickite Image

Images:

Warwickite Chondrodite

Comments: Black crystalline warwickite with tan chondrodite in white marble.
Location: Amity, near Warwick, Orange County, New York, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Warwickite Crystallography

Axial Ratios:

a:b:c =0.9827:1:0.3296

Cell Dimensions:

a = 9.197, b = 9.358, c = 3.085, Z = 4; V = 265.51 Den(Calc)= 3.68

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnam

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

By Intensity(I/I_o): 2.58(1), 1.5(0.5), 1.6(0.5),

Physical Properties of Warwickite

Cleavage:

{100} Perfect

Color:

Brown, Black.

Density:

3.36

Diaphaneity:

Transparent to Subtranslucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

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

Habit:

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

Hardness:

3-4 - Calcite-Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Silky

Streak:

bluish black

Optical Properties of Warwickite

Gladstone-Dale:

CI meas= 0.169 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.241 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2215,KPDmeas= 0.2426,KC= 0.2918
Ncalc = 1.98 - 2.07

Optical Data:

Biaxial (+), a=1.806, b=1.809, g=1.83, bire=0.0240

Calculated Properties of Warwickite

Electron Density:

Bulk Density (Electron Density)=3.25 gm/cc
note: Specific Gravity of Warwickite =3.36 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Warwickite= 7.12 barns/electron
U=PE_Warwickite x rElectron Density= 23.16 barns/cc.

Radioactivity:

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

Warwickite Classification

Dana Class:

24.02.02.01 (24)Borates - Anhydrous

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

(24.02.02)Dana Group

24.02.02.01 Warwickite Mg(Ti,Fe,Al)(BO3)O Pnam 2/m 2/m 2/m

24.02.02.02 Yuanfuliite (Mg,Fe)(Fe,Al,Mg,Ti,Fe)(BO3)O Pnam 2/m 2/m 2/m

Strunz Class:

06.AB.20 06 - BORATES

06.A - Monoborates

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

06.AB.20 Warwickite Mg(Ti,Fe,Al)(BO3)O Pnam 2/m 2/m 2/m

06.AB.20 Yuanfuliite (Mg,Fe)(Fe,Al,Mg,Ti,Fe)(BO3)O Pnam 2/m 2/m 2/m

Other Warwickite Information

References:

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

See Also:

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

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

Warwickite

Mg(Ti,Fe+++,Al)(BO3)O
Dana No: 24.02.02.01 Strunz No: 06.AB.20
Locality:

Notes:

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