Neighborite Mineral Data

General Neighborite Information

Chemical Formula:

NaMgF3

Composition:

Molecular Weight = 104.29 gm

Sodium 22.04 % Na 29.71 % Na₂O

Magnesium 23.31 % Mg 38.65 % MgO

Fluorine 54.65 % F 54.65 % F

- % F -23.01 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaMgF₃

Environment:

Found in a drill core penetration of the Eocene Green River Formation.

IMA Status:

Approved IMA 1961

Locality:

South Ouray, Uintah County, Utah, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Frank Neighbor (1906-?), American petroleum geologist, Sun Oil Co. who logged the first specimen.

Name Pronunciation:

Neighborite + Pronunciation

Synonym:

ICSD 75291

PDF 13-303

Neighborite Image

Images:

Neighborite

Comments: Dark red-brown neighborite crystals in matrix.
Location: Mont St. Hilaire, Quebec, Canada. Scale: Crystal Size 1-2 mm.
© Diederik Visser

Neighborite Crystallography

Axial Ratios:

a:b:c =0.6986:1:0.7169

Cell Dimensions:

a = 5.363, b = 7.676, c = 5.503, Z = 4; V = 226.54 Den(Calc)= 3.06

Crystal System:

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

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

By Intensity(I/I_o): 1.918(1), 2.71(0.5), 3.83(0.35),1.56(0.3), 2.3(0.3), 2.23(0.2), 1.58(0.1),

Physical Properties of Neighborite

Cleavage:

{???} Indistinct

Color:

Colorless, Pink, Reddish brown.

Density:

3.03

Diaphaneity:

Transparent to Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Octahedral Crystals - Occurs as octahedral shaped crystals.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Neighborite

Optical Data:

Biaxial (?), a=1.364, g=1.367, bire=0.0030

Calculated Properties of Neighborite

Electron Density:

Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Neighborite =3.06 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Neighborite= 1.14 barns/electron
U=PE_Neighborite x rElectron Density= 3.34 barns/cc.

Radioactivity:

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

Neighborite Classification

Dana Class:

11.01.01.01 (11)Halide Complexes; Alumino-fluorides

(11.01)where (A)m B (X)3

(11.01.01)Dana Group

11.01.01.01 Neighborite NaMgF3 Pcmn 2/m 2/m 2/m

Strunz Class:

03.AA.35 03 - HALIDES

03.A - Simple Halides, Without H2O

03.AA -M:X = 1:1, 2:3, 3:5, etc.

03.AA.35 Neighborite NaMgF3 Pcmn 2/m 2/m 2/m

Other Neighborite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

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

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

Neighborite

NaMgF3
Dana No: 11.01.01.01 Strunz No: 03.AA.35
Locality:

Notes:

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