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Billwiseite

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About BillwiseiteHide

Formula:
Sb3+5Nb3WO18
Colour:
Pale yellow (with a tinge of green),
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
6.330 (Calculated)
Crystal System:
Monoclinic
Name:
Named after William Stewart Wise (b. 1933), Professor of Geology Emeritus, University of California at Santa Barbara, USA. Named in recognition of his contribution to mineralogy and his inspiration and mentoring of mineralogy students at UCSB.
At the type locality, billwiseite can be partly mantled by B-rich muscovite.


Classification of BillwiseiteHide

Approved
Approval Year:
2010

Physical Properties of BillwiseiteHide

Vitreous
Colour:
Pale yellow (with a tinge of green),
Streak:
Colorless to very pale-yellow
Hardness:
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
{100}
Fracture:
Hackly
Density:
6.330 g/cm3 (Calculated)

Chemical Properties of BillwiseiteHide

Formula:
Sb3+5Nb3WO18

Crystallography of BillwiseiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 54.206(6) Å, b = 4.9163(5) Å, c = 5.5540(6) Å
β = 90.396(2)°
Ratio:
a:b:c = 11.026 : 1 : 1.13
Unit Cell V:
1475.5 ų
Z:
4
Morphology:
Euhedral crystals with a maximum size of ∽ 0.5 × 0.25 × 0.15 mm showing the following forms: {100} pinacoid ≈ {011} pinacoid ≈ {410} prism.
Twinning:
Contact twins on (100) are common

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.500 (51)
3.154 (90)
3.017 (100)
2.462 (23)
1.906 (47)
1.828 (30)
1.735 (30)
1.662 (53)

Type Occurrence of BillwiseiteHide

General Appearance of Type Material:
Found on the surface of a large (∽5 × 2.5 × 1.3 cm) crystal of lepidolite from a miarolitic cavity.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Department of Natural History, Royal Ontario Museum, Toronto, Canada, catalogue number M55951.
Geological Setting of Type Material:
Granitic pegmatite
Associated Minerals at Type Locality:

Synonyms of BillwiseiteHide

Other InformationHide

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 BillwiseiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hawthorne, F.C., Cámara, F., Cooper, M.A., Ball, N.A., Černý, P. and Laurs, B.M. (2011) Billwiseite, IMA 2010-053. CNMNC Newsletter No. 9, August 2011, page 2535; Mineralogical Magazine, 75, 2535-2540.
Hawthorne, F.C., Cooper, M.A., Ball, N.A., Abdu, Y.A., Černý, P., Cámara, F., Laurs, B.M. (2012): Billwiseite, ideally Sb3+5Nb3WO18, a new oxide mineral species from the Stak Nala pegmatite, Nanga Parba – Haramosh massif, Pakistan: description and crystal structure. Canadian Mineralogist, 50, 805-814.

Internet Links for BillwiseiteHide

Localities for BillwiseiteHide

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.
Pakistan (TL)
 
  • Gilgit-Baltistan (Northern Areas)
    • Baltistan
      • Skardu District
        • Haramosh Mts.
Hawthorne, F.C., Cámara, F., Cooper, M.A., Ball, N.A., Černý, P. and Laurs, B.M. (2011) Billwiseite, IMA 2010-053. CNMNC Newsletter No. 9, August 2011, page 2535; Mineralogical Magazine, 75, 2535-2540; Hawthorne, F.C., Cooper, M.A., Ball, N.A., Abdu, Y.A., Černý, P., Cámara, F., Laurs, B.M. (2012): Billwiseite, ideally Sb3+5Nb3WO18, a new oxide mineral species from the Stak Nala pegmatite, Nanga Parba – Haramosh massif, Pakistan: description and crystal structure. Canadian Mineralogist, 50, 805-814.
Mineral and/or Locality  
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