Bonaccordite
A valid IMA mineral species
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About Bonaccordite
Formula:
Ni2Fe3+(BO3)O2
Colour:
Reddish-brown, light grey
Hardness:
7
Specific Gravity:
5.17 (Calculated)
Crystal System:
Orthorhombic
Member of:
Name:
Named for the type locality at Bon Accord, South Africa.
This page provides mineralogical data about Bonaccordite.
Unique Identifiers
Mindat ID:
717
Long-form identifier:
mindat:1:1:717:9
IMA Classification of Bonaccordite
Approved
IMA Formula:
Ni2+2Fe3+O2(BO3)
Approval year:
1974
First published:
1974
Classification of Bonaccordite
6.AB.30
6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
24.2.1.4
24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
9.9.1
9 : Borates
9 : Borates of Ni
9 : Borates
9 : Borates of Ni
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Bna | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Bonaccordite
Transparency:
Opaque
Colour:
Reddish-brown, light grey
Hardness:
7 on Mohs scale
Hardness:
VHN15=1069 kg/mm2 - Vickers
Density:
5.17 g/cm3 (Calculated)
Optical Data of Bonaccordite
Anisotropism:
Medium to strong.
Bireflectance:
Distinct, in oil.
Colour in reflected light:
Gray with brownish tinge
Internal Reflections:
Strong reddish brown
Comments:
R1–R2: 14.2–17.6
Chemistry of Bonaccordite
Mindat Formula:
Ni2Fe3+(BO3)O2
Element Weights:
Elements listed:
Crystallography of Bonaccordite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pbam
Setting:
Pbam
Cell Parameters:
a = 9.213(6) Å, b = 12.229(7) Å, c = 3.001(2) Å
Ratio:
a:b:c = 0.753 : 1 : 0.245
Unit Cell V:
338.11 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space Group by analogy to ludwigite group
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014105 | Bonaccordite | Perkins D A, Attfield J P (1991) Resonant powder X-ray determination of the cation distribution in FeNi2BO5 Journal of the Chemical Society, Chemical Communications 1991 229-231 | 1991 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.548 Å | (100) |
| 2.514 Å | (100) |
| 5.10 Å | (50) |
| 1.898 Å | (50) |
| 4.61 Å | (40) |
| 2.334 Å | (35) |
| 2.025 Å | (35) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47i : [Terrestrial weathering of meteorites] |
Type Occurrence of Bonaccordite
General Appearance of Type Material:
Clusters of slender prisms up to 400x30 microns, forming veins in other minerals, and as rosette-like radiating groups in liebenbergite and trevorite.
Place of Conservation of Type Material:
Royal Ontario Museum, Toronto, Ontario, Canada, M33443.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 132463.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 132463.
Geological Setting of Type Material:
Tabular body of nickeliferous serpentinite.
Associated Minerals at Type Locality:
Synonyms of Bonaccordite
Other Language Names for Bonaccordite
Relationship of Bonaccordite to other Species
Member of:
Other Members of Ludwigite Group:
| Azoproite | (Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2 | Orth. mmm(2/m2/m2/m) : Pbam |
| Fredrikssonite | Mg2Mn3+O2(BO3) | Orth. mmm(2/m2/m2/m) : Pbam |
| Ludwigite | Mg2Fe3+(BO3)O2 | Orth. mmm(2/m2/m2/m) : Pbam |
| Marinaite | Cu2Fe3+O2(BO3) | Mon. 2/m : P21/b |
| Savelievaite | Mg2Cr3+O2(BO3) | Orth. mmm(2/m2/m2/m) : Pbam |
| Vonsenite | Fe2+2Fe3+(BO3)O2 | Orth. mmm(2/m2/m2/m) : Pbam |
Common Associates
Associations Based on Photo Data:
| 3 photos of Bonaccordite associated with Liebenbergite | Ni2(SiO4) |
Related Minerals - Strunz-mindat Grouping
| 6.AB. | Chubarovite | KZn2(BO3)Cl2 |
| 6.AB. | Rhabdoborite-(Mo) | Mg12Mo6+1.33O6(BO3)6F2 |
| 6.AB.05 | Hambergite | Be2(BO3)(OH) |
| 6.AB.10 | Berborite | Be2(BO3)(OH) · H2O |
| 6.AB.15 | Jeremejevite | Al6(BO3)5(F,OH)3 |
| 6.AB.20 | Yuanfuliite | Mg(Fe3+,Al)O(BO3) |
| 6.AB.20 | Warwickite | (Mg,Ti,Fe,Al)2O(BO3) |
| 6.AB.25 | Karlite | (Mg,Al)6.5(BO3)3(OH)4(◻,Cl)0.5 |
| 6.AB.30 | Marinaite | Cu2Fe3+O2(BO3) |
| 6.AB.30 | Savelievaite | Mg2Cr3+O2(BO3) |
| 6.AB.30 | Fredrikssonite | Mg2Mn3+O2(BO3) |
| 6.AB.30 | Vonsenite | Fe2+2Fe3+(BO3)O2 |
| 6.AB.30 | Ludwigite | Mg2Fe3+(BO3)O2 |
| 6.AB.30 | Azoproite | (Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2 |
| 6.AB.35 | Folvikite | Sb5+Mn3+(Mg,Mn2+)10O8(BO3)4 |
| 6.AB.35 | Pinakiolite | (Mg,Mn2+)2Mn3+(BO3)O2 |
| 6.AB.40 | Takéuchiite | (Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2 |
| 6.AB.40 | Blatterite | Sb5+3(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32 |
| 6.AB.40 | Orthopinakiolite | (Mg,Mn2+)2Mn3+(BO3)O2 |
| 6.AB.40 | Chestermanite | Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2 |
| 6.AB.45 | Aluminomagnesiohulsite | (Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2 |
| 6.AB.45 | Hulsite | Fe2+2Fe3+O2(BO3) |
| 6.AB.45 | Magnesiohulsite | Mg2Fe3+O2(BO3) |
| 6.AB.50 | Fluoborite | Mg3(BO3)(F,OH)3 |
| 6.AB.50 | Hydroxylborite | Mg3(BO3)(OH)3 |
| 6.AB.55 | Shabynite | Mg5(BO3)(OH)5(Cl,OH)2 · 4H2O |
| 6.AB.55 | Wightmanite | Mg5(BO3)O(OH)5 · 2H2O |
| 6.AB.60 | Gaudefroyite | Ca4Mn3+2-3(BO3)3(CO3)(O,OH)3 |
| 6.AB.65 | Sakhaite | Ca48Mg16(BO3)32(CO3)16 · 2(H2O,HCl) |
| 6.AB.70 | Harkerite | Ca48Mg16[AlSi4O15(OH)]4(BO3)16(CO3)16 · 2(H2O,HCl) |
| 6.AB.75 | Pertsevite-(F) | Mg2(BO3)(F,OH) |
| 6.AB.75 | Pertsevite-(OH) | Mg2(BO3)(OH) |
| 6.AB.80 | Jacquesdietrichite | Cu2(H2BO3)(OH)3 |
| 6.AB.85 | Rhabdoborite-(V) | Mg12(V5+,Mo6+,W6+)1.5O6{[BO3]6-x[(P,As)O4]xF2-x} (x < 1) |
| 6.AB.85 | Rhabdoborite-(W) | Mg12(W6+,V5+)1.5O6{[BO3]6-x[(P,As)O4]xF2-x} |
| 6.AB.85 | Painite | CaZrAl9(BO3)O15 |
| 6.AB.90 | Mengxianminite | (Ca,Na)2Sn2(Mg,Fe)3Al8[(BO3)(BeO4)O6]2 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Bonaccordite
mindat.org URL:
https://www.mindat.org/min-717.html
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References for Bonaccordite
Localities for Bonaccordite
Showing 1 localities.
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The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
South Africa (TL) | |
| De Waal et al. (1974) +2 other references |
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Bon Accord Ni deposit, Barberton, Mbombela Local Municipality, Ehlanzeni District Municipality, Mpumalanga, South Africa