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Gwihabaite

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About GwihabaiteHide

Formula:
(NH4,K)NO3
Colour:
Colourless
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
1.77
Crystal System:
Orthorhombic
Name:
Named after its type locality at the Gcwihaba Cave (Drotsky's Caverns), Maun, North-West District, Botswana (NOTE: The name was altered slightly to aid pronounciation - c in name stands for click sound ! of San people).
This page provides mineralogical data about Gwihabaite.


Classification of GwihabaiteHide

Approved
5.NA.15

5 : CARBONATES (NITRATES)
N : NITRATES
A : Without OH or H2O
Dana 7th ed.:
18.1.3.1

Physical Properties of GwihabaiteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
Density:
1.77 g/cm3 (Measured)    1.80 g/cm3 (Calculated)

Optical Data of GwihabaiteHide

Type:
Biaxial (-)
RI values:
nα = 1.458 nβ = 1.527 nγ = 1.599
2V:
Measured: 90° , Calculated: 86°
Max Birefringence:
δ = 0.141
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none

Chemical Properties of GwihabaiteHide

Formula:
(NH4,K)NO3
IMA Formula:
(NH4)(NO3)

Crystallography of GwihabaiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 7.075 Å, b = 7.647 Å, c = 5.779 Å
Ratio:
a:b:c = 0.925 : 1 : 0.756
Unit Cell V:
312.66 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Slender prismatic crystals, divergent aggregates or "cave flowers"

Type Occurrence of GwihabaiteHide

Synonyms of GwihabaiteHide

Other Language Names for GwihabaiteHide

Related Minerals - Nickel-Strunz GroupingHide

5.NA.05NitratineNaNO3Trig. 3m (3 2/m) : R3c
5.NA.10NiterKNO3Orth. mmm (2/m 2/m 2/m) : Pmma
5.NA.20NitrobariteBa(NO3)2Iso. m3 (2/m 3) : Pa3

Other InformationHide

Notes:
Soluble in water, deliquescent
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 GwihabaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bulletin of the South African Speleological Association: 36: 19-21.

Internet Links for GwihabaiteHide

Localities for GwihabaiteHide

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.
Botswana (TL)
 
  • North-West District
    • Ngamiland West District
[Bull. South African Speleological Assoc., 36, 19–21.; AmMin 84:194]
Czech Republic
 
  • Ústí nad Labem Region
    • Děčín District
Varilová, Z., Prikryl, R., & Cílek, V. (2011). Erratum to: Pravcice Rock Arch (Bohemian Switzerland National Park, Czech Republic) deterioration due to natural and anthropogenic weathering. Environmental Earth Sciences, 64(4), 1191.
Russia
 
  • Murmansk Oblast
    • Khibiny Massif
      • Koashva Mt
Anatoly Kasatkin collection and photo
South Africa
 
  • Gauteng
    • Johannesburg District (Central Rand)
      • Johannesburg
Handbook of Mineralogy; Martini, I. (1978). Mineralogy of the Transvaal caves. South African Journal of Geology, 81(1), 47-54.
    • West Rand District (West Rand)
      • Krugersdorp
Martini, I. (1978). Mineralogy of the Transvaal caves. South African Journal of Geology, 81(1), 47-54.
Spain
 
  • Basque Country
    • Vizcaya
      • Valle de Carranza
Martínez-Arkarazo, I., Angulo, M., Zuloaga, O., Usobiaga, A., & Madariaga, J. M. (2007). Spectroscopic characterisation of moonmilk deposits in Pozalagua tourist cave (Karrantza, Basque Country, North of Spain). Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 68(4), 1058-1064.
Tajikistan
 
  • Sughd
    • Zeravshan Range
      • Yagnob River
D.I.Belakovskiy data
Belakovski D.I.., Moskalev I.V. Natural ammonium nitrate from the products of selffiring coal layers in Kukhi-Malik valley (Central Tajikistan). Novye dannye o mineralakh, 1988, v.35, p. 191-194. (Russian)
USA
 
  • Tennessee
    • Marion Co.
American Journal Science (1857) 24:124
Venezuela
 
  • Bolívar
    • Auyán-tepui (Auyán-tepuy; Ayan Tepui)
BOLETÍN INFORMATIVO DE LA COMISIÓN DE GEOESPELEOLOGÍA (Federación Espeleológica de América Latina y el Caribe -FEALC-) No. 13, Octubre 1999
 
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