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Galiléia, Doce valley, Minas Gerais, Brazil
© Elmar Lackner
|System:||Triclinic||Colour:||Pale yellow, ...|
|Name:||Named after S.I. Ushkov (1880-1951), Russian naturalist who studied the Il'men National Forest.|
This page provides mineralogical data about Ushkovite.
Classification of Ushkovite
|IMA status:||Approved 1982|
|Strunz 8th edition ID:||7/D.10-20|
|Nickel-Strunz 10th (pending) edition ID:||8.DC.30|
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
|Dana 8th edition ID:||126.96.36.199|
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
|Hey's CIM Ref.:||19.14.11|
19 : Phosphates
14 : Phosphates of Fe and other metals
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Type Occurrence of Ushkovite
|Type Locality:||Pit No. 232, Bol'shoi Tatkul' Lake, Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia|
|Year of Discovery:||1982|
Physical Properties of Ushkovite
|Colour:||Pale yellow, orange-yellow, brown|
Crystallography of Ushkovite
|Cell Parameters:||a = 5.19Å, b = 10.7Å, c = 7.14Å|
α = 108.06°, β = 106.95°, γ = 72.7°
|Ratio:||a:b:c = 0.485 : 1 : 0.667|
|Unit Cell Volume:||V 351.13 Å³ (Calculated from Unit Cell)|
Optical Data of Ushkovite
|RI values:||nα = 1.584 nβ = 1.637 nγ = 1.670|
|2V:||Measured: 50° , Calculated: 74°|
|Maximum Birefringence:||δ = 0.086|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Ushkovite
|Essential elements:||Fe, H, Mg, O, P|
|All elements listed in formula:||Fe, H, Mg, O, P|
Relationship of Ushkovite to other Species
|Member of:||Laueite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Ushkovite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Ushkovite
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1983): 112: 42-46.
American Mineralogist (1984): 69: 212-213.
Internet Links for Ushkovite
Localities for Ushkovite
The 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.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Woodsboro, Frederick Co., Maryland, USAFrom Bill Cordua, 13th Dec 2013 02:30:58