Alvanite (IMA symbol: Alv [1] ) is a zinc nickel aluminium vanadate mineral with the chemical formula (Zn,Ni)Al4(V5+O3)2(OH)12·2H2O. It was originally discovered in the Karatau Mountains. [2]
Alvanite (IMA symbol: Alv [1] ) is a zinc nickel aluminium vanadate mineral with the chemical formula (Zn,Ni)Al4(V5+O3)2(OH)12·2H2O. It was originally discovered in the Karatau Mountains. [2]
Otavite is a rare cadmium carbonate mineral with the formula CdCO3. Otavite crystallizes in the trigonal system and forms encrustations and small scalenohedral crystals that have a pearly to adamantine luster. The color is white to reddish to yellow brown. Its Mohs hardness is 3.5 to 4 and the specific gravity is 5.04. Associated minerals include azurite, calcite, malachite, and smithsonite.
Abswurmbachite is a copper manganese silicate mineral ((Cu,Mn2+)Mn3+6O8SiO4). It was first described in 1991 and named after Irmgard Abs-Wurmbach (born 1938), a German mineralogist. It crystallizes in the tetragonal system. Its Mohs scale rating is 6.5 and a specific gravity of 4.96. It has a metallic luster and its color is jet black, with light brown streaks.
Adamsite-(Y) (previously IMA 1999-020), chemical formula NaY(CO3)2·6H2O is a mineral of sodium, yttrium, carbon, oxygen, and hydrogen. It is named after Frank Dawson Adams (1859–1942), professor of geology, McGill University. Its Mohs scale rating is 3.
Agrinierite (chemical formula K2(Ca,Sr)(UO2)3O3(OH)2·5H2O) is a mineral often found in the oxidation zone of uranium deposits. The IMA symbol is Agn. It is named for Henry Agrinier (1928–1971), an engineer for the Commissariat à l'Énergie Atomique.
Afmite (IMA symbol: Afm) is phosphate mineral with the chemical formula Al3(OH)4(PO4)(PO3OH)·H2O. It is named for the French mineralogy group Association Française de Microminéralogie, or AFM for short.
Alpeite (IMA symbol: Apt) is a calcium manganese magnesium silicate mineral with the chemical formula Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6. It is named for its type locality, the Monte Alpe mine in Italy.
Alpersite (IMA symbol: Aps) is a magnesium copper sulfate mineral with the chemical formula (Mg,Cu)[SO4]·7H2O. It is named for United States Geological Survey geochemist Charles N. Alpers.
Aluminocopiapite (IMA symbol: Acpi) is an aluminium iron sulfate mineral with the chemical formula Al2/3Fe3+4(SO4)6(OH)2·20H2O. Its type localities are Fortymile River in Alaska and the San Rafael Swell in Utah.
Alumohydrocalcite (IMA symbol: Ahcal) is a calcium aluminium carbonate mineral with the chemical formula CaAl2(CO3)2(OH)4·4H2O). Its type locality is Khakassia, Russia.
Andychristyite (IMA symbol: Acs) is a lead copper tellurate mineral with the chemical formula PbCu2+Te6+O5H2O. Its type locality is the Soda Mountains in California. It was named after Welsh–Australian mineralogist Andrew G. Christy.
Anthoinite (IMA symbol: Atn) is an aluminium tungsten oxide mineral with the chemical formula AlWO3(OH)3. Its type locality is Maniema in the Democratic Republic of the Congo.
Antipinite is a rare alkali Copper oxalate mineral with the chemical formula KNa3Cu2(C2O4)4. Its type locality is the Tarapacá Region in Chile.
Apjohnite (IMA symbol: Apj) is a manganese aluminium sulfate mineral with the chemical formula Mn2+Al2(SO4)4·22H2O. It was named after Trinity College Dublin professor James Apjohn. Its type locality is Maputo Province, Mozambique.
Apuanite (IMA symbol: Apu) is a rare iron antimony mineral with the chemical formula Fe2+Fe3+4Sb3+4O12S. Its type locality is the Province of Lucca, Italy.
Aramayoite is a mineral with the chemical formula Ag3Sb2(Bi,Sb)S6. Its type locality is Sud Chichas, Potosí, Bolivia.
Argentobaumhauerite (IMA symbol: Abha) is a rare mineral with the chemical formula Ag1.5Pb22As33.5S72. Its type locality is the Binn valley in Switzerland.
Arhbarite (IMA symbol: Arh) is a copper magnesium arsenate mineral with the chemical formula Cu2Mg(AsO4)(OH)3. It is named after its type locality, the Arhbar mine in Ouarzazate Province in Drâa-Tafilalet, Morocco.
Azoproite is a rare manganese iron borate mineral with the chemical formula (Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2. It was first identified near Lake Baikal, Russia. It was named after the Association pour l'Etude Géologique des Zones Profondes de l'Ecorce Terrestre, whose acronym is AZOPRO in Russian.
Aiolosite (IMA symbol: Aio) is a rare sodium bismuth sulfate mineral with the chemical formula Na4Bi(SO4)3Cl. Its type locality is Vulcano, Sicily, Italy. Its name comes from the Greek name Aeolus.
Alterite (IMA symbol: Atr) is a yellow-green mineral with the chemical formula Zn2Fe3+4(SO4)4(C2O4)2(OH)4·17H2O. Its type locality is Coconino County, Arizona. It is found exclusively in logs that have mineralized.
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