IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Chestermanite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About ChestermaniteHide

Charles W. Chesterman
Formula:
Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2
Colour:
greyish-green to black in coarse crystals
Lustre:
Vitreous, Silky
Hardness:
6
Specific Gravity:
3.72(2)
Crystal System:
Orthorhombic
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.
This page provides mineralogical data about Chestermanite.


Classification of ChestermaniteHide

Approved
Approval Year:
1986
First Published:
1988
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

Physical Properties of ChestermaniteHide

Vitreous, Silky
Comment:
Vitreous to silky
Colour:
greyish-green to black in coarse crystals
Hardness:
Fracture:
Irregular/Uneven, Conchoidal
Density:
3.72(2) g/cm3 (Measured)    3.650 g/cm3 (Calculated)

Optical Data of ChestermaniteHide

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 ChestermaniteHide

Formula:
Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2
IMA Formula:
Mg2(Fe3+,Mg,Al,Sb5+)O2(BO3)

Crystallography of ChestermaniteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 18.53 Å, b = 12.27 Å, c = 6.04 Å
Ratio:
a:b:c = 1.51 : 1 : 0.492
Unit Cell V:
1,373.27 ų (Calculated from Unit Cell)
Morphology:
Type material: Typically fibrous; rare prismatic crystals extended on
[001] and flattened on {010}; predominant forms (in order of decreasing importance) are {ll0}, {210}, and {010}. Other forms identified: {100}, {130}, {120}, {230}, {540}, and {320}. No terminating forms were found. All crystals finely striated parallel to [01l].

Type Occurrence of ChestermaniteHide

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:

Synonyms of ChestermaniteHide

Other Language Names for ChestermaniteHide

Relationship of Chestermanite to other SpeciesHide

Other Members of this group:
BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.
Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2Orth.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Ludwigite1 photo of Chestermanite associated with Ludwigite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.AB.05HambergiteBe2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
6.AB.10BerboriteBe2(BO3)(OH,F) · H2OTrig.
6.AB.15JeremejeviteAl6(BO3)5(F,OH)3Hex. 6/m : P63/m
6.AB.20Warwickite(Mg,Ti,Fe,Cr,Al)2O(BO3)Orth.
6.AB.20YuanfuliiteMg(Fe3+,Al)O(BO3)Orth.
6.AB.25KarliteMg7(BO3)3(OH,Cl)5Orth.
6.AB.30Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.
6.AB.30BonaccorditeNi2Fe3+(BO3)O2Orth.
6.AB.30FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2Orth.
6.AB.30LudwigiteMg2Fe3+(BO3)O2Orth.
6.AB.30VonseniteFe2+2Fe3+(BO3)O2Orth.
6.AB.35Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Mon.
6.AB.40BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
6.AB.40Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.
6.AB.40Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2Orth.
6.AB.45Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2Mon.
6.AB.45Magnesiohulsite(Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2Mon.
6.AB.45Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2Mon. 2/m
6.AB.50FluoboriteMg3(BO3)(F,OH)3Hex.
6.AB.50HydroxylboriteMg3(BO3)(OH)3Hex. 6/m : P63/m
6.AB.55ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2OMon.
6.AB.55WightmaniteMg5(BO3)O(OH)5 · 2H2OMon.
6.AB.60GaudefroyiteCa4Mn3+2-3(BO3)3(CO3)(O,OH)3Hex.
6.AB.65SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2ClIso. m3m (4/m 3 2/m) : Fd3m
6.AB.70HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
6.AB.75Pertsevite-(F)Mg2(BO3)(F,OH)Orth. mm2 : Pna21
6.AB.75Pertsevite-(OH)Mg2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
6.AB.80JacquesdietrichiteCu2(H2BO3)(OH)3Orth. mmm (2/m 2/m 2/m) : Pmna
6.AB.85PainiteCaZrAl9(BO3)O15Hex.

Related Minerals - Dana Grouping (8th Ed.)Hide

24.2.1.1LudwigiteMg2Fe3+(BO3)O2Orth.
24.2.1.2VonseniteFe2+2Fe3+(BO3)O2Orth.
24.2.1.3Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.
24.2.1.4BonaccorditeNi2Fe3+(BO3)O2Orth.
24.2.1.6FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.8.1VonseniteFe2+2Fe3+(BO3)O2Orth.
9.8.2LudwigiteMg2Fe3+(BO3)O2Orth.
9.8.3FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2Orth.

Fluorescence of ChestermaniteHide

No UV fluorescence

Other InformationHide

Magnetism:
Non-Magnetic
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 ChestermaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
Jambor, J.L., Puziewicz, J. (1990) New mineral names. American Mineralogist: 75: 431-438.
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.
Jambor, J.L. (1992) New mineral names. American Mineralogist: 77: 670-675.
Grew, E.S., Anovitz, L.M. (2002) BORON: Mineralogy, Petrology and Geochemistry, second edition.

Internet Links for ChestermaniteHide

Localities for ChestermaniteHide

ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • California
    • Fresno Co.
      • Lakeshore
Canadian Minelalogist Vol.26, pp. 911-916 (1988)
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 24, 2018 05:54:35 Page generated: October 16, 2018 16:43:25
Go to top of page