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Goanikontes Claim, Goanikontes, Arandis, Erongo Region, Namibiai
Regional Level Types
Goanikontes ClaimClaim
GoanikontesDesert
ArandisTown
Erongo RegionRegion
NamibiaCountry

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Key
Latitude & Longitude (WGS84):
22° South , 14° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Locality type:
Köppen climate type:


A uranium claim (mine) ca. 4 km SE of Goanikontes and ca. 27 km E of Swakopmund, at a distance of ca. 40 km from the Rössing Uranium Mine. Famous for excellent boltwoodite specimens (often with locality labeled as "Rössing").

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals.

Detailed Mineral List:

Boltwoodite
Formula: (K,Na)(UO2)(SiO3OH) · 1.5H2O
Habit: Needles to 1 cm, as radial, compact spheres (rare)
Colour: yellow to orangeyellow
Fluorescence: Reddish orange in longwave, no fluoresence in shortwave
Description: Spherelike aggregates up to 3 cm in diameter has been found
Reference: Palfi, A.G., Wartha, R., Niedermayr, G. & Jahn, S. (2001) Das Boltwoodit-Vorkommen von Goanikontes in der Namib. In: Jahn, S. et al (editors): Namibia. Zauberwelt edler Steine und Kristalle. Bode Verlag. 2001, p 126-135.; Windisch, W. (2014) An introduction to micromounting.
Calcite
Formula: CaCO3
Reference: Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 338 pp. (in English)
Cryptomelane
Formula: K(Mn4+7Mn3+)O16
Reference: Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 338 pp. (in English)
Goethite
Formula: α-Fe3+O(OH)
Reference: Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 338 pp. (in English)
Gypsum
Formula: CaSO4 · 2H2O
Reference: Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 338 pp. (in English)
'Psilomelane' ?
Formula: Mn, O
Description: As a black coating on boltwoodite crystals
Reference: Palfi, A.G., Wartha, R., Niedermayr, G. & Jahn, S. (2001): Das Boltwoodit-Vorkommen von Goanikontes in der Namib. In: Jahn, S. et al (editors): Namibia. Zauberwelt edler Steine und Kristalle. Bode Verlag. 2001, p 126-135
Pyrolusite
Formula: Mn4+O2
Reference: Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 338 pp. (in English)
Quartz
Formula: SiO2
Reference: Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 338 pp. (in English)
Uraninite
Formula: UO2
Reference: Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 338 pp. (in English)
Uranophane-β
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 338 pp. (in English)
Weeksite
Formula: K2(UO2)2(Si5O13) · 4H2O
Reference: Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 338 pp. (in English)

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Cryptomelane4.DK.05aK(Mn4+7Mn3+)O16
Goethite4.00.α-Fe3+O(OH)
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Boltwoodite9.AK.15(K,Na)(UO2)(SiO3OH) · 1.5H2O
Uranophane-β9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Weeksite9.AK.30K2(UO2)2(Si5O13) · 4H2O
Unclassified Minerals, Rocks, etc.
'Psilomelane' ?-Mn, O

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB8X16
Cryptomelane7.9.1.2K(Mn4+7Mn3+)O16
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Boltwoodite53.3.1.5(K,Na)(UO2)(SiO3OH) · 1.5H2O
Uranophane-β53.3.1.9Ca(UO2)2(SiO3OH)2 · 5H2O
Weeksite53.3.2.1K2(UO2)2(Si5O13) · 4H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Psilomelane' ?-Mn, O

List of minerals for each chemical element

HHydrogen
H Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
H Goethiteα-Fe3+O(OH)
H GypsumCaSO4 · 2H2O
H Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2O
H WeeksiteK2(UO2)2(Si5O13) · 4H2O
CCarbon
C CalciteCaCO3
OOxygen
O Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
O CalciteCaCO3
O CryptomelaneK(Mn74+Mn3+)O16
O Goethiteα-Fe3+O(OH)
O GypsumCaSO4 · 2H2O
O PyrolusiteMn4+O2
O QuartzSiO2
O UraniniteUO2
O Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2O
O WeeksiteK2(UO2)2(Si5O13) · 4H2O
O PsilomelaneMn, O
NaSodium
Na Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
SiSilicon
Si Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
Si QuartzSiO2
Si Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2O
Si WeeksiteK2(UO2)2(Si5O13) · 4H2O
SSulfur
S GypsumCaSO4 · 2H2O
KPotassium
K Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
K CryptomelaneK(Mn74+Mn3+)O16
K WeeksiteK2(UO2)2(Si5O13) · 4H2O
CaCalcium
Ca CalciteCaCO3
Ca GypsumCaSO4 · 2H2O
Ca Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2O
MnManganese
Mn CryptomelaneK(Mn74+Mn3+)O16
Mn PyrolusiteMn4+O2
Mn PsilomelaneMn, O
FeIron
Fe Goethiteα-Fe3+O(OH)
UUranium
U Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
U UraniniteUO2
U Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2O
U WeeksiteK2(UO2)2(Si5O13) · 4H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Palfi, A.G., Wartha, R., Niedermayr, G., and Jahn, S., (2001) Das Boltwoodit-Vorkommen von Goanikontes in der Namib. In: Jahn, S. et al (editors): Namibia. Zauberwelt edler Steine und Kristalle. Bode Verlag. 2001: 126-135.
von Bezing, L., Bode, R. & Jahn, S. (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern: 338 (in English).

External Links

http://www.fosagams.co.za/content/introduction-micromounting-wolf-windisch [Windisch, W. (2014) An introduction to micromounting. - Photo of Boltwoodite from Goanikontes]

Other Regions, Features and Areas containg this locality

African PlateTectonic Plate

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