X = colorless, pale orange, red-brown; Y = Z = pale brownish yellow, pale green
2V angle
Measured: 2° to 40°
References
[2][3][4][5]
Clintonite is a calcium magnesium aluminium phyllosilicate mineral. It is a member of the margarite group of micas and the subgroup often referred to as the "brittle" micas. Clintonite has the chemical formula Ca(Mg,Al) 3(Al 3Si)O 10(OH) 2. Like other micas and chlorites, clintonite is monoclinic in crystal form and has a perfect basal cleavage parallel to the flat surface of the plates or scales. The Mohs hardness of clintonite is 6.5, and the specific gravity is 3.0 to 3.1. It occurs as variably colored, colorless, green, yellow, red, to reddish-brown masses and radial clusters.
The brittle micas differ chemically from the micas in containing less silica and no alkalis, and from the chlorites in containing much less water; in many respects, they are intermediate between the micas and chlorites.[6] Clintonite and its iron-rich variety xanthophyllite are sometimes considered the calcium analogues of the phlogopites.[7]
Typical formation environment is in serpentinized dolomitic limestone and contact metamorphosed skarns. It occurs with talc, spinel, grossular, vesuvianite, clinopyroxene, monticellite, chondrodite, phlogopite, chlorite, quartz, calcite and dolomite.[5]
Clintonite was first described in 1843 for an occurrence in Orange County, New York. It was named for De Witt Clinton (1769–1828).[4]
^One or more of the preceding sentences incorporates text from a publication now in the public domain: Spencer, Leonard James (1911). "Clintonite". In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 6 (11th ed.). Cambridge University Press. p. 530.
^Alietti, Elisa; et al. (1997). "Clintonite-1M: Crystal chemistry and its relationships to closely associated Al-rich phlogopite" (PDF). American Mineralogist. 82: 936–945. doi:10.2138/am-1997-9-1011.
Clintonite is a calcium magnesium aluminium phyllosilicate mineral. It is a member of the margarite group of micas and the subgroup often referred to as...
gains in Congress and kept the presidential election reasonably close. Clintonite Democratic-Republicans in many states refused to work with their Federalist...
concern about inequality. The promises of New Labour in the UK and of the Clintonites in the US have been a disappointment." On September 27, 2015, it was...
Common micas: Biotite Lepidolite Phlogopite Zinnwaldite Brittle micas: Clintonite Very fine-grained micas, which typically show more variation in ion and...
publication now in the public domain: Spencer, Leonard James (1911). "Clintonite". In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 6 (11th ed.)...
ISSN 0362-4331. Retrieved 2018-12-10. Smith, Ben (October 11, 2007). "The Clintonite who owns National Enquirer". The Politico newspaper. Arlington County...
between Tammany Hall and the Clintonites intensified, as each party continued attacking each other. One of the Clintonites, James Cheetham, wrote extensively...
involvement in Muslim magazine". Business Insider. Retrieved August 24, 2016. "Clintonites jostle for jobs at State". Politico. February 10, 2009. Retrieved June...
"Edwards Walks the Line". Slate. Smith, Ben (October 11, 2007). "The Clintonite who owns National Enquirer". The Politico. "Tabloid's affair rumor dispelled...
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