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|System:||Hexagonal||Colour:||White, bluish-white, ...|
|Name:||For US geochemist, John Joseph Fahey (1901-80).|
This page provides mineralogical data about Faheyite.
Classification of Faheyite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||7/C.02-10|
|Nickel-Strunz 10th (pending) edition ID:||8.CA.15|
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
|Dana 8th edition ID:||220.127.116.11|
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
5 : AXO4·xH2O
|Hey's CIM Ref.:||19.3.13|
19 : Phosphates
3 : Phosphates of Be and Mg
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Type Occurrence of Faheyite
|Type Locality:||Sapucaia Mine (Proberil mine), Sapucaia do Norte, Galiléia, Doce valley, Minas Gerais, Brazil|
|General Appearance of Type Material:||In vugs as white, bluishwhite, or brownish-white tufted fibers coating other minerals.|
|Year of Discovery:||1952|
|Geological Setting of type material:||A granite pegmatite|
|Associated Minerals at type locality:|
Physical Properties of Faheyite
|Colour:||White, bluish-white, brownish-white|
Crystallography of Faheyite
|Cell Parameters:||a = 9.43Å, c = 16Å|
|Ratio:||a:c = 1 : 1.697|
|Unit Cell Volume:||V 1,232.18 Å³ (Calculated from Unit Cell)|
|Morphology:||Individual fibers of faheyite average about 0.08 mm. in length and 0.01 mm. in thickness. The singly fibers may be terminated by pyramid faces.|
Optical Data of Faheyite
|RI values:||nω = 1.631 nε = 1.652|
|Maximum Birefringence:||δ = 0.021|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Faheyite
|Essential elements:||Be, Fe, H, Mn, O, P|
|All elements listed in formula:||Be, Fe, H, Mg, Mn, Na, O, P|
Relationship of Faheyite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Faheyite
|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 Faheyite
Lindberg & Murata (1953): Faheyite, a new phosphate mineral from the Sapucaia pegmatite mine, Minas Gerais, Brazil. American Mineralogist. 38, 263-270, 349.
American Mineralogist (1964): 49: 395.
Internet Links for Faheyite
Localities for Faheyite
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: Lucky Spot group, Mariposa Co., California, USAFrom Chester S. Lemanski, Jr., 23rd May 2013 16:13:18