Pegmatites of this region are related to ancient Granites, hosted in crystalline schists belonging to the system of Sierras Pampeanas. Pegmatite mine "Angel" (province of Córdoba) is rich in Quartz, (Microcline) and pinched with poor plagioclase feldspar, and encloses Uraninite, Garnet, Triplite and rarely Gahnite and Zircon. The Uraninite occurs in cubic crystals isolated or associated in twinned, or girls bodies, within Muscovite or also in Garnet and up in Triplite. The oxidized components of uranium include Gummite and Uranophane, Autunite and Renardite(Dewindtite), the latter impregnating masses of Mica, Feldspar and Quartz, up to 20 and more tons of volume, being also carrier as well as Columbite in pockets of some hundreds of kilograms.
The Boltwoodite appears in these pegmatites as a result of the weathering of Uraninite; in radial aggregates, and solid. Pale yellow; White streak; glassy shine to Pearl. Cleavage {010}, perfect; {001}, imperfect. D = 3, 5-4. PE = 3, 60. Presents weak fluorescent green under ultraviolet light. Radioactive.
Chemical Analysis:
SiO2: 14.00%.
UO3: 66,64%.
K2O: 10.97%.
H2O: 8.39%.

NOTE: See additional data under pages for the species "Gummite" and Vandendriesscheite.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

25 valid minerals.

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Demartis, M., Melgarejo, J. C., Colombo, F., Alfonso, P., Coniglio, J. E., Pinotti, L. P., & D’Eramo, F. J. (2014). Extreme F activities in late pegmatitic events as a key factor for LILE and HFSE enrichment: The Ángel pegmatite, central Argentina. The Canadian Mineralogist, 52(2), 247-269.

ⓘ Albite var. Cleavelandite

Formula: Na(AlSi₃O₈)

References:

ⓘ Almandine

Formula: Fe²⁺₃Al₂(SiO₄)₃

References:

C. A. Rinaldi (1963). Estudio de las pegmatitas uraníferas de la Sierra de Comechingones. Tesis doctoral. Universidad Nacional de Buenos Aires.

ⓘ Autunite

Formula: Ca(UO₂)₂(PO₄)₂ · 10-12H₂O

References:

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección

ⓘ Beryl

Formula: Be₃Al₂(Si₆O₁₈)

References:

ⓘ Boltwoodite

Formula: (K,Na)(UO₂)(SiO₃OH) · 1.5H₂O

Habit: monoclinic

Colour: Pale Yellow

Fluorescence: weak green

Description: The Boltwoodite appears in these pegmatites as a result of the weathering of Uraninite; in radial aggregates, and solid. Pale yellow; White streak; glassy shine to Pearl. Cleavage {010}, perfect; {001}, imperfect. D = 3, 5-4. PE = 3, 60. Presents weak fluorescent green under ultraviolet light. Radioactive. Chemical Analysis: SiO2: 14.00%. UO3: 66,64%. K2O: 10.97%. H2O: 8.39%.

References:

Toubes, R.O., Chaar, E. y Spikermann, J.P., 1973. Minerales radiactivos de la República Argentina. 5 Congreso Geológico Argentino, 1, 249-260.

ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series'

References:

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección

ⓘ Columbite-(Mn)

Formula: Mn²⁺Nb₂O₆

References:

ⓘ Dewindtite

Formula: H₂Pb₃(UO₂)₆O₄(PO₄)₄ · 12H₂O

Habit: Orthorhombic

Colour: Canary-yellow

Fluorescence: weak yellow-green.

Description: Dewindtite(canary-yellow crystals)(Known and mentioned as Renardite).

References:

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección

ⓘ Elbaite

Formula: Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

References:

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

ⓘ Gahnite

Formula: ZnAl₂O₄

References:

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

References:

C. A. Rinaldi (1963). Estudio de las pegmatitas uraníferas de la Sierra de Comechingones. Tesis doctoral. Universidad Nacional de Buenos Aires.

ⓘ 'Gummite'

Description: The "Gummite" of Mine "Ángel" is actually Vandendriesscheite (Pb1, 5 (UO2) 10 O6 (OH) 11 · 11H2O) and appears in these pegmatites as a result of the weathering of Uraninite, about the same in aggregate micro crystalline orange yellow to yellowish brown and glossy adamantine. Chemical Analysis of "Gummite" (Vandendriesscheite) variety orange yellow: SG: 4.1 Lost to Red: 8.80% Insoluble: 3.04% UO2: 0.81% UO3: 80.97% ThO2 and Rare Earth: 2.15% PbO: 5.20% CaO: Traces. P2O5: Traces.

References:

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección

Pough, F. H. (1976) Peterson Field Guides - Rocks and Minerals, 4th Ed., page 124.

ⓘ Hydroxykenomicrolite

Formula: (◻,Na,Sb³⁺)₂Ta₂O₆(OH)

References:

ⓘ Lacroixite

Formula: NaAl(PO₄)F

References:

ⓘ Microcline

Formula: K(AlSi₃O₈)

References:

ⓘ Montebrasite

Formula: LiAl(PO₄)(OH)

References:

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

ⓘ Nanpingite

Formula: CsAl₂(AlSi₃O₁₀)(OH,F)₂

References:

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

References:

ⓘ Pollucite

Formula: (Cs,Na)₂(Al₂Si₄O₁₂) · 2H₂O

References:

ⓘ Quartz

Formula: SiO₂

References:

C. A. Rinaldi (1963). Estudio de las pegmatitas uraníferas de la Sierra de Comechingones. Tesis doctoral. Universidad Nacional de Buenos Aires.

ⓘ Sokolovaite

Formula: CsLi₂Al(Si₄O₁₀)F₂

References:

ⓘ Topaz

Formula: Al₂(SiO₄)(F,OH)₂

References:

Raul Tauber Larry collection

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección

ⓘ Triplite

Formula: Mn²⁺₂(PO₄)F

References:

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección

ⓘ Uraninite

Formula: UO₂

References:

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección.

ⓘ Uranophane

Formula: Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O

References:

Rob Lavinsky specimen

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección

ⓘ Vandendriesscheite

Formula: PbU₇O₂₂ · 12H₂O

Description: Chemical Analysis of Vandendriesscheite ("Gummite") variety orange yellow: SG: 4.1 Lost to Red: 8.80% Insoluble: 3.04% UO2: 0.81% UO3: 80.97% ThO2 and Rare Earth: 2.15% PbO: 5.20% CaO: Traces. P2O5: Traces.

References:

Linares, E. y Toubes, R.O., 1960. Los minerales radiactivos de la República Argentina. 1ras Jornadas Geológicas Argentinas, 3: 191-205.

ⓘ Zircon

Formula: Zr(SiO₄)

References:

Victorio Angelelli (1958) Los minerales de Uranio, sus yacimientos y prospección

Gallery:

Ca(UO₂)₂(PO₄)₂ · 10-12H₂Oⓘ Autunite

Ca(UO₂)₂(SiO₃OH)₂ · 5H₂Oⓘ Uranophane

PbU₇O₂₂ · 12H₂Oⓘ Vandendriesscheite

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Gahnite	4.BB.05	ZnAl₂O₄
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Columbite-(Mn)	4.DB.35	Mn²⁺Nb₂O₆
ⓘ	Hydroxykenomicrolite	4.DH.	(◻,Na,Sb³⁺)₂Ta₂O₆(OH)
ⓘ	Uraninite	4.DL.05	UO₂
ⓘ	Vandendriesscheite	4.GB.40	PbU₇O₂₂ · 12H₂O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Montebrasite	8.BB.05	LiAl(PO₄)(OH)
ⓘ	Triplite	8.BB.10	Mn²⁺₂(PO₄)F
ⓘ	Lacroixite	8.BH.10	NaAl(PO₄)F
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
ⓘ	Autunite	8.EB.05	Ca(UO₂)₂(PO₄)₂ · 10-12H₂O
ⓘ	Dewindtite	8.EC.10	H₂Pb₃(UO₂)₆O₄(PO₄)₄ · 12H₂O
Group 9 - Silicates
ⓘ	Almandine	9.AD.25	Fe²⁺₃Al₂(SiO₄)₃
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Topaz	9.AF.35	Al₂(SiO₄)(F,OH)₂
ⓘ	Uranophane	9.AK.15	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
ⓘ	Boltwoodite	9.AK.15	(K,Na)(UO₂)(SiO₃OH) · 1.5H₂O
ⓘ	Beryl	9.CJ.05	Be₃Al₂(Si₆O₁₈)
ⓘ	Elbaite	9.CK.05	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
ⓘ	Nanpingite	9.EC.15	CsAl₂(AlSi₃O₁₀)(OH,F)₂
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Sokolovaite	9.EC.20	CsLi₂Al(Si₄O₁₀)F₂
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite var. Cleavelandite	9.FA.35	Na(AlSi₃O₈)
ⓘ		9.FA.35	Na(AlSi₃O₈)
ⓘ	Pollucite	9.GB.05	(Cs,Na)₂(Al₂Si₄O₁₂) · 2H₂O
Unclassified
ⓘ	'Gummite'	-
ⓘ	'Columbite-(Fe)-Columbite-(Mn) Series'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Autunite	Ca(UO₂)₂(PO₄)₂ · 10-12H₂O
H	ⓘ Boltwoodite	(K,Na)(UO₂)(SiO₃OH) · 1.5H₂O
H	ⓘ Dewindtite	H₂Pb₃(UO₂)₆O₄(PO₄)₄ · 12H₂O
H	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
H	ⓘ Montebrasite	LiAl(PO₄)(OH)
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Nanpingite	CsAl₂(AlSi₃O₁₀)(OH,F)₂
H	ⓘ Pollucite	(Cs,Na)₂(Al₂Si₄O₁₂) · 2H₂O
H	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
H	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
H	ⓘ Vandendriesscheite	PbU₇O₂₂ · 12H₂O
H	ⓘ Hydroxykenomicrolite	(◻,Na,Sb³⁺)₂Ta₂O₆(OH)
Li	Lithium
Li	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Li	ⓘ Montebrasite	LiAl(PO₄)(OH)
Li	ⓘ Sokolovaite	CsLi₂Al(Si₄O₁₀)F₂
Be	Beryllium
Be	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
B	Boron
B	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Autunite	Ca(UO₂)₂(PO₄)₂ · 10-12H₂O
O	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
O	ⓘ Boltwoodite	(K,Na)(UO₂)(SiO₃OH) · 1.5H₂O
O	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
O	ⓘ Dewindtite	H₂Pb₃(UO₂)₆O₄(PO₄)₄ · 12H₂O
O	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Gahnite	ZnAl₂O₄
O	ⓘ Lacroixite	NaAl(PO₄)F
O	ⓘ Columbite-(Mn)	Mn²⁺Nb₂O₆
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Montebrasite	LiAl(PO₄)(OH)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Nanpingite	CsAl₂(AlSi₃O₁₀)(OH,F)₂
O	ⓘ Pollucite	(Cs,Na)₂(Al₂Si₄O₁₂) · 2H₂O
O	ⓘ Quartz	SiO₂
O	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
O	ⓘ Triplite	Mn₂²⁺(PO₄)F
O	ⓘ Uraninite	UO₂
O	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
O	ⓘ Vandendriesscheite	PbU₇O₂₂ · 12H₂O
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Sokolovaite	CsLi₂Al(Si₄O₁₀)F₂
O	ⓘ Hydroxykenomicrolite	(◻,Na,Sb³⁺)₂Ta₂O₆(OH)
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
F	ⓘ Lacroixite	NaAl(PO₄)F
F	ⓘ Nanpingite	CsAl₂(AlSi₃O₁₀)(OH,F)₂
F	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
F	ⓘ Triplite	Mn₂²⁺(PO₄)F
F	ⓘ Sokolovaite	CsLi₂Al(Si₄O₁₀)F₂
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Boltwoodite	(K,Na)(UO₂)(SiO₃OH) · 1.5H₂O
Na	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Na	ⓘ Lacroixite	NaAl(PO₄)F
Na	ⓘ Pollucite	(Cs,Na)₂(Al₂Si₄O₁₂) · 2H₂O
Na	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Na	ⓘ Hydroxykenomicrolite	(◻,Na,Sb³⁺)₂Ta₂O₆(OH)
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Al	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Al	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Al	ⓘ Gahnite	ZnAl₂O₄
Al	ⓘ Lacroixite	NaAl(PO₄)F
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Montebrasite	LiAl(PO₄)(OH)
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Nanpingite	CsAl₂(AlSi₃O₁₀)(OH,F)₂
Al	ⓘ Pollucite	(Cs,Na)₂(Al₂Si₄O₁₂) · 2H₂O
Al	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
Al	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Al	ⓘ Sokolovaite	CsLi₂Al(Si₄O₁₀)F₂
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Si	ⓘ Boltwoodite	(K,Na)(UO₂)(SiO₃OH) · 1.5H₂O
Si	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Si	ⓘ Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Nanpingite	CsAl₂(AlSi₃O₁₀)(OH,F)₂
Si	ⓘ Pollucite	(Cs,Na)₂(Al₂Si₄O₁₂) · 2H₂O
Si	ⓘ Quartz	SiO₂
Si	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
Si	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Si	ⓘ Sokolovaite	CsLi₂Al(Si₄O₁₀)F₂
P	Phosphorus
P	ⓘ Autunite	Ca(UO₂)₂(PO₄)₂ · 10-12H₂O
P	ⓘ Dewindtite	H₂Pb₃(UO₂)₆O₄(PO₄)₄ · 12H₂O
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
P	ⓘ Lacroixite	NaAl(PO₄)F
P	ⓘ Montebrasite	LiAl(PO₄)(OH)
P	ⓘ Triplite	Mn₂²⁺(PO₄)F
K	Potassium
K	ⓘ Boltwoodite	(K,Na)(UO₂)(SiO₃OH) · 1.5H₂O
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Autunite	Ca(UO₂)₂(PO₄)₂ · 10-12H₂O
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mn	Manganese
Mn	ⓘ Columbite-(Mn)	Mn²⁺Nb₂O₆
Mn	ⓘ Triplite	Mn₂²⁺(PO₄)F
Fe	Iron
Fe	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Zn	Zinc
Zn	ⓘ Gahnite	ZnAl₂O₄
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)
Nb	Niobium
Nb	ⓘ Columbite-(Mn)	Mn²⁺Nb₂O₆
Sb	Antimony
Sb	ⓘ Hydroxykenomicrolite	(◻,Na,Sb³⁺)₂Ta₂O₆(OH)
Cs	Caesium
Cs	ⓘ Nanpingite	CsAl₂(AlSi₃O₁₀)(OH,F)₂
Cs	ⓘ Pollucite	(Cs,Na)₂(Al₂Si₄O₁₂) · 2H₂O
Cs	ⓘ Sokolovaite	CsLi₂Al(Si₄O₁₀)F₂
Ta	Tantalum
Ta	ⓘ Hydroxykenomicrolite	(◻,Na,Sb³⁺)₂Ta₂O₆(OH)
Pb	Lead
Pb	ⓘ Dewindtite	H₂Pb₃(UO₂)₆O₄(PO₄)₄ · 12H₂O
Pb	ⓘ Vandendriesscheite	PbU₇O₂₂ · 12H₂O
U	Uranium
U	ⓘ Autunite	Ca(UO₂)₂(PO₄)₂ · 10-12H₂O
U	ⓘ Boltwoodite	(K,Na)(UO₂)(SiO₃OH) · 1.5H₂O
U	ⓘ Dewindtite	H₂Pb₃(UO₂)₆O₄(PO₄)₄ · 12H₂O
U	ⓘ Uraninite	UO₂
U	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
U	ⓘ Vandendriesscheite	PbU₇O₂₂ · 12H₂O

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References

Friz, C.T., Rodrigo, F., Stipanicic, P.N. (xxxx) Recursos y posibilidades Uraníferas en Argentina. Session 2.11 P/405. Comision Nacional de Energia Atomica.

Universidad Nacional de La Plata (xxxx) Publicación N°4. 110 pages. La Plata.

Angelelli, Victorio (1958) Los Minerales de Uranio, sus Yacimientos y Prospección. Departamento de Geología y Minería. Comisión Nacional de Energía Atómica.

Linares, E., Toubes, R.O. (1960) Los minerales radiactivos de la República Argentina. 1ras Jornadas Geológicas Argentinas: 3: 191-205.

Rinaldi, C.A. (1963) Estudio de las pegmatitas uraníferas de la Sierra de Comechingones. Tesis doctoral. Universidad Nacional de Buenos Aires.

Toubes, R.O., Chaar, E., Spikermann, J.P. (1973) Minerales radiactivos de la República Argentina. 5 Congreso Geológico Argentino: 1: 249-260.

de Brodtkorb, M.K., Gay, H.D. (1994) Las Especies Minerales de la República Argentina. Anexo 1981-1994. Instituto de Recursos Minerales.

Demartis, M., Melgarejo, J.C., Colombo, F., Alfonso, P., Coniglio, J.E., Pinotti, L.P., D’Eramo, F.J. (2014) Extreme F activities in late pegmatitic events as a key factor for LILE and HFSE enrichment: The Ángel pegmatite, central Argentina. The Canadian Mineralogist: 52(2): 247-269.

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