Bonaccordite Mineral Data

[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.

General Bonaccordite Information

Chemical Formula:

Ni2Fe+++BO5

Composition:

Molecular Weight = 264.03 gm

Iron 21.15 % Fe 30.24 % Fe₂O₃

Nickel 44.46 % Ni 56.58 % NiO

Boron 4.09 % B 13.18 % B₂O₃

Oxygen 30.30 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ni₂Fe³⁺BO₅

Environment:

Small tabular body of nickeliferous serpentinite, probably a contact deposit, along the junction of quartzite and an ultramafic intrusive. Possibly because of a nickel-rich meteorit e impact.

IMA Status:

Approved IMA 1974

Locality:

Three km west of the Scotia talc mine, Bon Accord area, Barberton, Transvaal, South Africa. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Bonaccordite + Pronunciation

Synonym:

ICSD 71193

PDF 29-939

Search for Bonaccordite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Bonaccordite Crystallography

Axial Ratios:

a:b:c =0.7533:1:0.2454

Cell Dimensions:

a = 9.213, b = 12.229, c = 3.001, Z = 4; V = 338.11 Den(Calc)= 5.19

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbam

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

By Intensity(I/I_o): 2.514(1), 2.548(1), 5.1(0.5),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Perkins D A , Attfield J P , Journal of the Chemical Society, Chemical Communications , 1991 (1991) p.229-231, Resonant powder X-ray determination of the cation distribution in FeNi2BO5, Locality: synthetic

Physical Properties of Bonaccordite

Color:

Reddish brown.

Density:

5.17

Diaphaneity:

Opaque

Hardness:

7 - Quartz

Luster:

Vitreous - Adamantine

Streak:

brown

Optical Properties of Bonaccordite

Optical Data:

NCalc= 2.16 - from Gladstone-Dale relationship (KC = 0.2232) where Ncalc=Dcalc*KC+1
NCalc= 2.15 - from Gladstone-Dale relationship (KC = 0.2232) where Ncalc=Dmeas*KC+1

Calculated Properties of Bonaccordite

Electron Density:

Bulk Density (Electron Density)=4.99 gm/cc
note: Specific Gravity of Bonaccordite =5.19 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Bonaccordite= 24.37 barns/electron
U=PE_Bonaccordite x rElectron Density= 121.65 barns/cc.

Radioactivity:

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

Bonaccordite Classification

Dana Class:

24.02.01.04 (24)Borates - Anhydrous

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

(24.02.01)Ludwigite Group (Space Group: Pbam)

24.02.01.01 Ludwigite Mg2FeBO5 Pbam 2/m 2/m 2/m

24.02.01.02 Vonsenite Fe2FeBO5 Pbam 2/m 2/m 2/m

24.02.01.03 Azoproite (Mg,Fe)2(Fe,Ti,Mg)BO5 Pbam 2/m 2/m 2/m

24.02.01.04 Bonaccordite Ni2FeBO5 Pbam 2/m 2/m 2/m

24.02.01.05 Chestermanite Mg2(Fe,Mg,Al,Sb)BO3O2 Pbam 2/m 2/m 2/m

24.02.01.06 Fredrikssonite Mg2(Mn,Fe)O2(BO3) Pbam 2/m 2/m 2/m

Strunz Class:

06.AB.30 06 - BORATES

06.A - Monoborates

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

06.AB.30 Azoproite (Mg,Fe)2(Fe,Ti,Mg)BO5 Pbam 2/m 2/m 2/m

06.AB.30 Bonaccordite Ni2FeBO5 Pbam 2/m 2/m 2/m

06.AB.30 Fredrikssonite Mg2(Mn,Fe)O2(BO3) Pbam 2/m 2/m 2/m

06.AB.30 Ludwigite Mg2FeBO5 Pbam 2/m 2/m 2/m

06.AB.30 Vonsenite Fe2FeBO5 Pbam 2/m 2/m 2/m

Other Bonaccordite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Bonaccordite :
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 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Bonaccordite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Bonaccordite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Bonaccordite Mineral Data :

Ask about Bonaccordite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Bonaccordite

Ni2Fe+++BO5
Dana No: 24.02.01.04 Strunz No: 06.AB.30
Locality:

Notes: