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Mcallisterite

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J.F McAllister
Formula:
Mg2[B6O7(OH)6]2 · 9H2O
Colour:
colourless, white
Hardness:
Specific Gravity:
1.867
Crystal System:
Trigonal
Name:
Named in 1965 by Waldemar Schaller, Angellina Calomeris Vlisidis, and Mary Emma Mrose in honor of James Franklin McAllister [November 11, 1911- September 29, 2000 Menlo Park, California, USA] USGS Geologist who first described the material.
This page provides mineralogical data about Mcallisterite.


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Classification of McallisteriteHide

Approved
Approval Year:
1963
6.FA.10

6 : BORATES
F : Hexaborates
A : Neso-hexaborates
26.6.2.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
6 : Hexaborates
9.2.14

9 : Borates
2 : Borates of Be and Mg

Physical Properties of McallisteriteHide

Transparency:
Transparent
Colour:
colourless, white
Streak:
white
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
on {0001} and {0112}
Density:
1.867(5) g/cm3 (Measured)    1.866 g/cm3 (Calculated)

Optical Data of McallisteriteHide

Type:
Uniaxial (-)
RI values:
nω = 1.504 nε = 1.459
Max Birefringence:
δ = 0.045
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of McallisteriteHide

Formula:
Mg2[B6O7(OH)6]2 · 9H2O

Crystallography of McallisteriteHide

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3c
Setting:
R3c
Cell Parameters:
a = 11.546(1) Å, c = 35.562(5) Å
Ratio:
a:c = 1 : 3.08
Unit Cell V:
4,105.63 ų (Calculated from Unit Cell)
Z:
6
Morphology:
Rhombohedral crystals to 12 mm, efforescences

Type Occurrence of McallisteriteHide

Synonyms of McallisteriteHide

Other Language Names for McallisteriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Gowerite1 photo of Mcallisterite associated with Gowerite on mindat.org.
Starkeyite1 photo of Mcallisterite associated with Starkeyite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.FA.05AksaiteMg[B6O7(OH)6] · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
6.FA.15AdmontiteMgB6O10 · 7H2OMon.
6.FA.20RivadaviteNa6Mg[B6O7(OH)6]4 · 10H2OMon. 2/m : P21/m
6.FA.25TeruggiteCa4Mg[AsO4|B6O7(OH)6]2 · 12H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.2.1HambergiteBe2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
9.2.2SuaniteMg2[B2O5]Mon.
9.2.3KotoiteMg3[BO3]2Orth. mmm (2/m 2/m 2/m) : Pnnm
9.2.4SzaibélyiteMgBO2(OH)Mon.
9.2.5PreobrazhenskiteMg3B11O15(OH)9Orth.
9.2.6AksaiteMg[B6O7(OH)6] · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
9.2.7WightmaniteMg5(BO3)O(OH)5 · 2H2OMon.
9.2.8PinnoiteMg[B2O(OH)6]Tet. 4/m : P42/m
9.2.9KurnakoviteMgB3O3(OH)5 · 5H2OTric. 1 : P1
9.2.10HalurgiteMg2[B4O7]2 · 5H2OMon.
9.2.11InderiteMgB3O3(OH)5 · 5H2OMon. 2/m : P21/b
9.2.12HungchaoiteMg(B4O7) · 9H2OTric. 1
9.2.13AdmontiteMgB6O10 · 7H2OMon.
9.2.15RivadaviteNa6Mg[B6O7(OH)6]4 · 10H2OMon. 2/m : P21/m
9.2.16KaliboriteKMg2H[B6O8(OH)5]2(H2O)4Mon. 2/m : B2/b
9.2.17IquiqueiteK3Na4Mg(CrO4)B24O39(OH) · 12H2OHex.

Fluorescence of McallisteriteHide

Pale yellow

Other InformationHide

Notes:
Slowly soluble in water.
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 McallisteriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schaller, Waldemar Theodore, Angelina Calomeris Vlisidis & Mary Emma Mrose (1964), Macallisterite, 2MgO.6B2O36.15H2O, a new hydrous magnesium borate mineral from the Death Valley region, Inyo County, California (abstract): Geol. Soc. Amer. Program, Miami, Florida Meeting: 173, Nov, 1964.
American Mineralogist (1965): 50: 629-640.
American Mineralogist (1967): 52: 1776.
Dal Negro, A. (1969), The crystal structure of mcallisterite, Mg2[B6O7(OH)6]2•9H20 (abstract): Mineralogical Abstracts (1972): 23: 172.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for McallisteriteHide

Localities for McallisteriteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Argentina
 
  • Salta
    • Los Andes department
      • Salar del Hombre Muerto
Amer. Mineral., 1967, 52, 326.; Am Min 58:308-313; Alonso, R. N. (1999). On the origin of La Puna borates. Acta geológica hispánica, 34(2), 141-166.; CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, 9:1-27.
China
 
  • Qinghai Province
    • Haixi Autonomous Prefecture
      • Da Qaidam Co. (Dachaidan Co.)
Shaoxiu Yang (1991): Journal of Lake Sciences 3(1), 1-10; Garrett, D.E. (1998): Borates: Handbook of deposits, processing, properties, and use. Academic Press (San Diego, London), 491 pp.; Qingzhong Wang, Yingkai Xiao, Chonggeng Zhang, Haizhen Wei, and Zhiqi Zhao (2001): Bulletin of Mineralogy, Petrology and Geochemistry 20(4), 344-366; Zheng, M. P., Qi, W., & Yuan, H. R. (2005). Characteristics of salt lake boron deposits and magnesium borate deposits of the Qinghai-Tibet Plateau, China. In Mineral Deposit Research: Meeting the Global Challenge (pp. 1123-1125). Springer Berlin Heidelberg.
Kazakhstan
 
  • Atyrau Province (Atyrau Oblysy; Atyrau Oblast')
    • Atyrau (Gur'yev)
Anatoly Kasatkin data
USA
 
  • California
    • Inyo Co.
      • Death Valley
Econ Geol (1996) 91:622-635
      • Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area)
        • Ryan
Am Min 64:3-4 pp 369-375; American Mineralogist: 55: 349-357; Erd, R.C., J.F. McAllister, and G.D. Eberlein (1979) New data on hungchaoite, the second world occurrence, Death Valley region, California. American Mineralogist: 64: 369-375.
        • Twenty Mule Team Canyon
American Mineralogist (1979): 64(3-4): 369-375.; Erd, R.C., J.F. McAllister, and G.D. Eberlein (1979) New data on hungchaoite, the second world occurrence, Death Valley region, California. American Mineralogist: 64: 369-375.
Schaller, Waldemar Theodore, et al (1965), American Mineralogist: 65: 629-640; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 240.
Am Min 64:3-4 pp 369-375; Erd, R.C., J.F. McAllister, and G.D. Eberlein (1979) New data on hungchaoite, the second world occurrence, Death Valley region, California. American Mineralogist: 64: 369-375.
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Ogdensburg
          • Sterling Hill
Dunn(1995):Pt5:641.
Mineral and/or Locality  
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