Formula: Na4Mn5Si10O24(OH)6.6H2O
Unclassified silicate
Specific gravity: 2.58, 2.64
Hardness: 2
Streak: White
Colour: Yellowish to bright yellow
Solubility: Readily decomposed by cold 10% hydrochloric acid
Magnetism: Strongly electromagnetic
Common impurities: Fe,Mg,Ca,Sr,K



At the Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Quebec, Canada, zakharovite is associated with terskite, lovozerite, ussingite, natrolite, microcline, yofortierite, analcime, natrolite and polylithionite (HOM).

At the Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Quebec, Canada, zakharovite is associated with eudialyte, varennesite, catapleiite and labuntsovite (HOM).

There are two co-type Localities, Yukspor Mt, Khibiny Massif, and Karnasurt Mountain, Lovozersky District, both in Murmansk Oblast, Russia. Here zakharovite occurs in ussingite veinlets cutting foyaite (a type of nepheline syenite in differentiated alkalic massifs (HOM).

At the Palitra pegmatite, Karnasurt mine, Kedykverpakhk Mountain, Lovozersky District, Murmansk Oblast, Russia, zakharovite is an alteration product of manaksite; it occurs as bright yellow films and crusts to 0.5 mm thick on surfaces and in cracks of manaksite crystals. Larger zakharovite spherules to 1.5 mm diameter are observed rarely in natrosilite near its contact with manaksite (Minrec 36.5.413-414).

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