Annite gallery

ANNITE Gallery Return to Annite page. Click on image for larger view
See analysis study of New Hampshire Black Micas (pdf).
ANNITE Worthy Hill power line pegmatite, Goffstown, NH 7 cm specimen. Annite (black mica) totally enclosed in muscovite.	Species: ANNITE Locality: Worthy Hill power line pegmatite, Goffstown, NH Specimen Size: 7 cm specimen. Annite (black mica) totally enclosed in muscovite. Field Collected: Tom Mortimer Catalog No.: 887 Notes: Annite verified by EDS analysis. Al must be greater than Si for siderophyllite A second, weight % oxide, EDS analysis BC521 also confirmed annite. Chemistry from this analysis: K_1.14(Fe_2.20Mg_0.45)Ti_0.16Al_1.94Si_2.78O₁₂ , normalized for 12 O. Ideal annite chemistry is: KFe₃AlSi₃O₁₀(OH)₂ . In the BC521 analysis, the Mg indicates some phlogopite component and some Al is likely occupying the Si site. Ti is frequently seen in biotite micas.
ANNITE Rt. 16 construction site, Bartlett, NH 4 cm specimen with 1.5 cm black annite mica cleavage	Species: ANNITE (Biotite mica group) Locality: Rt. 16 construction site, Bartlett, NH Specimen Size: 4 cm specimen with 1.5 cm black annite mica cleavage Field Collected: Tom Mortimer Catalog No.: 1696 Notes: Annite identified by EDS analysis. The author has had several NH biotite mica specimens analyzed - seeking a confirmed NH siderophyllite example. Aluminum must be greater than silicon for siderophyllite. The conventional wisdom is that most biotite mica in the Conway granite of the White Mountains is the annite species.
ANNITE Rt. 101 - 101A Road Cut, Amherst, NH 4.5 inch specimen. ANNITE Rt. 101 - 101A Road Cut, Amherst, NH EDS analysis shows this biotite is closest to the annite species, (red star).	Species: ANNITE Locality: Rt. 101 - 101A Road Cut, Amherst, NH Specimen Size: 4.5 inch specimen. Field Collected: Tom Mortimer Catalog No.: NC Notes: Voucher specimen - not remarkable. EDS analysis shows this biotite is closest to the annite species, (red star). A second EDS analysis, BC520, gave a similar result that supported the annite identification.
ANNITE Ellacoya Locale, Gilford, NH Foreground mica crystal is 0.7 mm	Species: ANNITE Locality: Ellacoya Locale, Gilford, NH Specimen Size: Foreground mica crystal is 0.7 mm Field Collected: Tom Mortimer Catalog No.: u2173 Notes: This could be one of several dark mica species, but the nice hexagonal form initially suggested annite to me. An April 2018 carbon tape mounted grain EDS analysis (set 19, BC289) indicated a potassium, iron dominant (over magnesium) mica, confirming annite. The chemistry from the analysis gave: (normalized for one atom of potassium) K(Fe_1.87,Mg_1.02)Al_0.92Si_2.62O₁₁Cl_0.1. This is not too far from the annite - phlogopite midpoint. This is a reasonably satisfying analysis. For an annite - phlogopite mica, the Mg + Fe should add to 3, the Al should be 1 and the Si should be 3 Some greenish foliated balls of mica are also seen at this locality. These are likely a chlorite group species. The chlorite group micas do not have potassium.
ANNITE Ellacoya Locale, Gilford, NH 4 mm field of view	Species: ANNITE Locality: Ellacoya Locale, Gilford, NH Specimen Size: 4 mm field of view Field Collected: Tom Mortimer Catalog No.: u2170 Notes:
ANNITE Black Cap Mtn., Conway, NH 4.5 cm specimen	Species: ANNITE Locality: Black Cap Mtn., Conway, NH Specimen Size: 4.5 cm specimen Field Collected: Tom Mortimer - 5/21/83 Catalog No.: 2169 Notes: Specimen came from tailings pile adjacent to deep well miaroltic pocket collected by Bill Ross in the 1970's. An EDS analysis (BC522, a weight % oxide analysis) indicated the annite species. A moderate fluorine peak (@ 677 eV) was not quantified, suggesting fluorannite, an IMA approved species. Another EDS analysis is planned. Mindat.org has no North American photos of fluorannite. HOM fluorannite analysis has one APFU F.
ANNITE Stop & Shop Plaza (now Dollar Store), Milford, NH Specimen view 7 cm across	Species: ANNITE Locality: Stop & Shop Plaza (now Dollar Store), Milford, NH Specimen Size: Specimen view 7 cm across Field Collected: Tom Mortimer Catalog No.: TBC Notes: An EDS analysis (BC520, a weight % oxide analysis) indicated the annite species. A moderate fluorine peak (@ 677 eV) was not quantified
ANNITE Murphy Prospect, Springfield, NH 9.5 cm annite cleavage	Species: ANNITE Locality: Murphy Prospect, Springfield, NH Specimen Size: 9.5 cm annite cleavage Field Collected: Tom Mortimer 9/14/2011 Catalog No.: 2175 Notes: EDS analysis indicated a chemistry of K_1.14Fe_2.04Mg_0.23Al_1.89Si_2.66O₁₁ normalized for 11 O.
ANNITE Murphy Prospect, Springfield, NH 4.5 cm annite cleavage	Species: ANNITE Locality: Murphy Prospect, Springfield, NH Specimen Size: 4.5 cm annite cleavage Field Collected: Tom Mortimer 9/14/2011 Catalog No.: 2175 - two pieces cataloged with this number Notes:
ANNITE Frechette Quarry, Conway, NH 1.8 mm hexagonal annite book	Species: ANNITE Locality: Frechette Quarry, Conway, NH Specimen Size: 1.8 mm hexagonal annite book Field Collected: Jim Parella Catalog No.: u2660 Notes: EDS analysis indicated the annite mica. No Mg was detected, so close to the annite end member. Jim Parella attempted to relocate the Frechette Quarry in 2022. He concluded that the quarry and sandpit had been covered over and reclaimed. This annite has a greasy brown appearance. A small blue titanite crystal is also on this specimen.