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Chestermanite

A valid IMA mineral species
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Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2
Colour:
greyish-green to black in coarse crystals
Lustre:
Vitreous, Silky
Hardness:
6
Specific Gravity:
3.72
Crystal System:
Orthorhombic
Member of:
Orthopinakiolite Group
Name:
Named by R.C. Erd and E.E. Foord in 1988 in honor of Charles Wesley Chesterman (2 February 1913, Larned, Kansas, USA – 25 March 1991, Napa, California, USA), geologist and mineralogist, California Division of Mines and Geology, San Francisco, USA, who discovered the first specimens.
Type Locality:
ⓘUnnamed Skarn occurrence [1], Kaiser Wilderness area, Fresno County, California, USA
This page provides mineralogical data about Chestermanite.


Unique Identifiers
IMA Formula:
Mg2(Fe3+,Mg,Al,Sb5+)O2(BO3)
Approval year:
1986
First published:
1988

Classification of Chestermanite

6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
Dana 8th ed.:
24.2.1.5

24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
Hey's CIM Ref.:
9.8.4

9 : Borates
8 : Borates of Fe

Mineral Symbols
Comment:
Vitreous to silky
Colour:
Greyish-green to black in coarse crystals
Streak:
Pale grayish green
Hardness:
6 onMohs scale
Tenacity:
Brittle
Fracture:
Irregular/Uneven, Conchoidal
Density:
3.72(2) g/cm3 (Measured)    3.650 g/cm3 (Calculated)

Optical Data of Chestermanite
Surface Relief:
Moderate
Dispersion:
distinct to strong
Pleochroism:
Visible
Comments:
X = dark greenish blue; Y = green; Z = pale yellowish brown
Comments:
Absorption: X >> Y > Z.

Chemistry of Chestermanite

Crystallography of Chestermanite
Place of Conservation of Type Material:
Holotype specimen (80-PP-2) and cotypic material preserved at the U.S. National Museum, Washington, D.C. (NMNH 165968)
Geological Setting of Type Material:
A lens of brucite marble, ~370 m2 in area, encased in a magnetite-forsterite skarn surrounded by schists and hornfels. The metamorphosed sediments are transected by dykes and sills of granodiorite.
Associated Minerals at Type Locality:
BruciteCalciteFluoboriteLöllingiteLudwigite
SaffloriteSpinelWightmanite

Synonyms of Chestermanite

Other Language Names for Chestermanite

Relationship of Chestermanite to other Species
Other Members of Orthopinakiolite Group:
BlatteriteSb5+3(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth.mmm(2/m2/m2/m) :Pnnm
Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.mmm(2/m2/m2/m) :Pnnm
Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2Orth.mmm(2/m2/m2/m) :Pnnm

Common AssociatesTrig. 32 :R326.AB.Rhabdoborite-(Mo)Mg12Mo6+1.33O6(BO3)6F2Hex. 6 :P636.AB.05HambergiteBe2(BO3)(OH)Orth.mmm(2/m2/m2/m) :Pbca6.AB.10BerboriteBe2(BO3)(OH,F) · H2OTrig.6.AB.15JeremejeviteAl6(BO3)5(F,OH)3Hex. 6/m :P63/m6.AB.20YuanfuliiteMg(Fe3+,Al)O(BO3)Orth.mmm(2/m2/m2/m) :Pnma6.AB.20Warwickite(Mg,Ti,Fe,Al)2O(BO3)Orth.mmm(2/m2/m2/m) :Pnma6.AB.25Karlite(Mg,Al)6.5(BO3)3(OH)4(◻,Cl)0.5Orth. 222 :P212126.AB.30MarinaiteCu2Fe3+O2(BO3)Mon. 2/m :P21/b6.AB.30SavelievaiteMg2Cr3+O2(BO3)Orth.mmm(2/m2/m2/m) :Pbam6.AB.30FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2Orth.mmm(2/m2/m2/m) :Pbam6.AB.30VonseniteFe2+2Fe3+(BO3)O2Orth.mmm(2/m2/m2/m) :Pbam6.AB.30LudwigiteMg2Fe3+(BO3)O2Orth.mmm(2/m2/m2/m) :Pbam6.AB.30Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.mmm(2/m2/m2/m) :Pbam6.AB.30BonaccorditeNi2Fe3+(BO3)O2Orth.mmm(2/m2/m2/m) :Pbam6.AB.35FolvikiteSb5+Mn3+(Mg,Mn2+)10O8(BO3)4Mon. 2 :P26.AB.35Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Mon. 2/m :B2/m6.AB.40Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2Orth.mmm(2/m2/m2/m) :Pnnm6.AB.40BlatteriteSb5+3(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth.mmm(2/m2/m2/m) :Pnnm6.AB.40Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.mmm(2/m2/m2/m) :Pnnm6.AB.45Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2Mon. 2/m :P2/m6.AB.45HulsiteFe2+2Fe3+O2(BO3)Mon. 2/m :P2/m6.AB.45MagnesiohulsiteMg2Fe3+O2(BO3)Mon. 2/m :P2/m6.AB.50FluoboriteMg3(BO3)(F,OH)3Hex. 6/m :P63/m6.AB.50HydroxylboriteMg3(BO3)(OH)3Hex. 6/m :P63/m6.AB.55ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2OMon.6.AB.55WightmaniteMg5(BO3)O(OH)5 · 2H2OMon. 2/m6.AB.60GaudefroyiteCa4Mn3+2-3(BO3)3(CO3)(O,OH)3Hex.6.AB.65SakhaiteCa48Mg16(BO3)32(CO3)16 · 2(H2O,HCl)Iso.m3m(4/m32/m) :Fd3m6.AB.70HarkeriteCa48Mg16[AlSi4O15(OH)]4(BO3)16(CO3)16 · 2(H2O,HCl)Trig.3m(32/m) :R3m6.AB.75Pertsevite-(F)Mg2(BO3)(F,OH)Orth.mm2 :Pna216.AB.75Pertsevite-(OH)Mg2(BO3)(OH)Orth.mmm(2/m2/m2/m) :Pnma6.AB.80JacquesdietrichiteCu2(H2BO3)(OH)3Orth.mmm(2/m2/m2/m) :Pmna6.AB.85Rhabdoborite-(V)Mg12(V5+,Mo6+,W6+)1.5O6{[BO3]6-x[(P,As)O4]xF2-x} (x < 1)Hex. 6 :P636.AB.85Rhabdoborite-(W)Mg12(W6+,V5+)1.5O6{[BO3]6-x[(P,As)O4]xF2-x}Hex. 6 :P636.AB.85PainiteCaZrAl9(BO3)O15Hex. 6/m :P63/m6.AB.90Mengxianminite(Ca,Na)2Sn2(Mg,Fe)3Al8[(BO3)(BeO4)O6]2Orth.mm2 :Fdd2

Fluorescence of Chestermanite

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    • References for ChestermaniteⓘUnnamed Skarn occurrence [1] (TL)Erd et al. (1988)
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