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Chestermanite

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Formula:
Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2
System:
Orthorhombic
Hardness:
6
This page provides mineralogical data about Chestermanite.

Classification of Chestermanite

Approved 1986
6.AB.40

6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
24.2.1.5

24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
9.8.4

9 : Borates
8 : Borates of Fe
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First Recorded Occurrence of Chestermanite

Year of Discovery:
1986

Physical Properties of Chestermanite

Hardness (Mohs):
6

Crystallography of Chestermanite

Crystal System:
Orthorhombic
Cell Parameters:
a = 18.53Å, b = 12.27Å, c = 6.04Å
Ratio:
a:b:c = 1.51 : 1 : 0.492
Unit Cell Volume:
V 1,373.27 ų (Calculated from Unit Cell)

Optical Data of Chestermanite

Type:
Biaxial (+)
RI values:
nα = 1.753 nβ = 1.763 nγ = 1.791
2V:
Measured: 63° , Calculated: 64°
Max Birefringence:
δ = 0.038
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
distinct to strong

Chemical Properties of Chestermanite

Formula:
Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2
Essential elements:
All elements listed in formula:

Relationship of Chestermanite to other Species

Other Members of Group:
Blatterite(Mn2+,Mg)2(Mn3+,Sb3+,Fe3+)(BO3)O2
Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2
Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2
6.AB.05HambergiteBe2(BO3)(OH)
6.AB.10BerboriteBe2(BO3)(OH,F) · H2O
6.AB.15JeremejeviteAl6(BO3)5(F,OH)3
6.AB.20Warwickite(Mg,Fe2+)3Ti(BO3)2O2
6.AB.20YuanfuliiteMg(Fe3+,Fe2+,Al,Ti,Mg)(BO3)O
6.AB.25KarliteMg7(BO3)3(OH,Cl)5
6.AB.30Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2
6.AB.30BonaccorditeNi2Fe3+(BO3)O2
6.AB.30FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2
6.AB.30LudwigiteMg2Fe3+(BO3)O2
6.AB.30VonseniteFe22+Fe3+(BO3)O2
6.AB.35Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2
6.AB.40Blatterite(Mn2+,Mg)2(Mn3+,Sb3+,Fe3+)(BO3)O2
6.AB.40Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2
6.AB.40Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2
6.AB.45Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2
6.AB.45Magnesiohulsite(Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2
6.AB.45Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2
6.AB.50FluoboriteMg3(BO3)(F,OH)3
6.AB.50HydroxylboriteMg3(BO3)(OH)3
6.AB.55ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2O
6.AB.55WightmaniteMg5(BO3)O(OH)5 · 2H2O
6.AB.60GaudefroyiteCa4Mn3+2-3(BO3)3(CO3)(O,OH)3
6.AB.65SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2Cl
6.AB.70HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2O
6.AB.75Pertsevite-(F)Mg2(BO3)(F,OH)
6.AB.75Pertsevite-(OH)Mg2(BO3)(OH)
6.AB.80JacquesdietrichiteCu2(H2BO3)(OH)3
6.AB.85PainiteCaZrAl9(BO3)O15
9.8.1VonseniteFe22+Fe3+(BO3)O2
9.8.2LudwigiteMg2Fe3+(BO3)O2
9.8.3FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2

Other Names for Chestermanite

Name in Other Languages:

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.

References for Chestermanite

Reference List:
Erd R C, Foord E E (1988): Chestermanite, a new member of the ludwigite-pinakiolite group from Fresno County, California. The Canadian Mineralogist, 26, 911-916. [Abs. in American Mineralogist (1990): 75: 431.]

Alfredsson V, Bovin J O, Norrestam R, Terasaki O (1991): The structure of the mineral chestermanite, Mg2.25Al0.16Fe0.43Ti0.02Sb0.13O2BO3. A combined single-crystal X-ray and HREM study. Acta Chemica Scandinavica 45, 797-804.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Chestermanite

Localities for Chestermanite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
USA
 
  • California
    • Fresno Co.
      • Lakeshore
Canadian Minelalogist Vol.26, pp. 911-916 (1988)
Mineral and/or Locality  
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