Locality: Johnson Rd., Bow, NH
Confidence: 2
Chemistry: [ ]2W2O6(H2O)
Specimen Size: 1.5 mm field of view
Field Collected: 2016
Catalog No.: A Bob Wilken specimen and photo
Notes: [bw] "These are definitely cubes with a mirror-like luster. There's no way they can be anglesite. A possibility that I've been wondering about is galena. It doesn't usually form individual, separate cubes that I've seen. But, maybe it could if it were to condense from hot gases. On the other hand, these little cubes are usually in vugs where other sulfides seem to have deteriorated. And, often there is a bluish covellite-look to the crusty coating surrounding them. It's what again makes me think the Pb has recombined with Cu to form murdochite."
An Octobr, 2018 carbon tape grain EDS analyses showed only tungston and oxygen, suggesting hydrokenoelsmoreite, [ ]2W2O6(H2O), as a possible species.
Locality: Johnson Rd., Bow, NH
Specimen Size: 1.2 mm field of view
Field Collected: 2016
Catalog No.: TBC
Notes: Stack of 15 images in 0.01 increments with Nikon Plan 10 objective and Canon G9 camera.
These are not as lustrous as those in Bob Wilken's photo.
Locality: Johnson Rd., Bow, NH
Specimen Size: 1.1 mm field of view
Field Collected: 2016
Catalog No.: TBC
Notes: Oriented for cube face reflection. Helicon Focus stacking software method C (top) and method A (lower) on same image stack.
Confidence: 3
Chemistry: 3PbO · H2O
Locality: Johnson Rd., Bow, NH
Specimen Size: 9 mm field of view.
Field Collected: 2016
Catalog No.: u2136
Notes: Perhaps hydroplumbite, a hydrated lead oxide, the only Pb oxide that is white. This powdery white unknown has shown up on several specimens. It appears to be an weathering product of galena. This small chunk is solid galena, except for this powdery crust. I cannot find any photos of hydroplumbite. Mindat has it as "Approved, grandfathered, questionable." It is not listed in my 2008 Fleisher's.
Tests: Not fluorescent. Not soluble in water or muriatic acid.
A carbon tape grain EDS analyses (BC286 - set 19) indicated a lead mineral with oxygen. Unfortunately, the EDS did not resolve an ambiguity of lead and sulfur, so the possibility of powdered anglesite cannot be eliminated. The tiny bit of aluminum in the plot is likely a contaminant.
Locality: Water Pocket Locality, Albany, NH
Confidence: 3
Chemistry: Ca(Ce,La)(CO3)2(OH)
Specimen Size: 4 mm field of view
Field Collected: Bob Wilken - 8/29/17
Catalog No.: u2293
Notes: A January 2020 polished grain EDS analysis [bw WPV13] suggested hydrosynchysite-(Ce). No fluorine was detected (at 0.677 KeV). The unlabeled peak just above the carbon is the oxygen line.
A blocky bertrandite crystal is in the lower foreground. The broken hexagonal hydrosynchysite-(Ce) crystals show zoning. The black mineral is believed to be ilmenite.
Locality: Water Pocket Locality, Albany, NH
Specimen Size: 0.4 mm brown prismatic crystal on bertrandite crystal
Field Collected: Bob Wilken - 8/29/17
Catalog No.: u2293
Notes: Another view from u2293.
Confidence: 2
Chemistry: (Mg,Fe)SiO3
Locality: Aggregate Industries Quarry, Raymond, NH
Specimen Size: TBD
Field Collected (owner): Peter Cristofono
Notes: [PC] "Hypersthene? from monzonite. It looks to be a pyroxene based on cleavage, and if so apparently hypersthene according to Freedman (1950); However, I don't think it can be visually distinguished with certainty from augite."
[TM] Phillip Morrill did report hypersthene from New Hampshire.
Confidence: 3
Chemistry: U4+Fe2+Nb2O8
Locality: Oliver Trench, Moat Mtn., Hale's Location, NH
Specimen Size: 3.5 mm field of view
Field Collected: Bob Janules
Catalog No.: A Bob Janules collection specimen
Notes: A Bob Janules submitted EDS analysis suggested ishikawaite. The spectral response at about 0.4 Kev, labeled Al, is suspect. Aluminum should give a response at 1.48 KeV.
Photo with Canon T3i, 50 mm Canon lens,1 cm extension tube, plus Nikon Plan 10 microscope objective. Helicon Focus.
Confidence: 5
Chemistry: Fe(UO2)2(AsO4)2 · 10-12H2O
Locality: Parker Mtn. Mine, Center Strafford, NH
Specimen Size: 1 mm field of view, top photo. Tiny rectangular, paper-thin, plates of kahlerite.
Catalog No.: u2028
Field Collected: Bob Janules
Owner: Tom Mortimer
Analysis: Kahlerite confirmed by EDS analysis.
Notes: Only two Parker Mtn. kahlerite specimens are known. The other is in the collection of Dana Morong. Altering lollingite is present with scorodite on this specimen and is likely the source of the arsenic.
Locality: Parker Mtn. Mine, Center Strafford, NH
Specimen Size: 2 mm field of view. Kahlerite (coated?) in lollingite vug
Field Collected - Owner: Dana Morong
Catalog No.: A Dana Morong collection specimen
Notes:
Confidence: 4
Chemistry: Mg(CO3)
Locality: Charles Davis Mine, N. Groton, NH
Specimen Size: 8 mm magnesite crystal
Field Collected: Anna Wilken
Catalog No.: A Anna Wilken collection specimen
Notes: Magnesite is an unusual species to find in a pegmatite environment. Under the scope, rhombic carbonate cleavage is observed. Bubbles formed on surface of a grain in cold muriatic acid. EDS analysis showed only magnesium, oxygen and some likely carbon, (carbon was disabled from the analysis because the polished grain was carbon coated.) The polished grain was probed in two spots and both gave the same result.
I [tm] asked Jim Nizamoff for his opinion on the magnesite identification. he replied: "I agree that magnesite in a pegmatite is pretty much unheard of. I do believe that Mg can be concentrated in small areas in the right environment though. Perhaps this is what happened at CD. There is an unusual amount of Mg in a number of the local pegmatites so you have the ability to up concentrate much more easily than pegmatites in other localities. I do find the magnesite ID a little bit questionable I but cannot refute what the EDS scan shows as I know that almost anything is possible in micro environments in pegmatites. I feel safe telling you to go with it as magnesite."
Confidence: 5
Chemistry: Mn+23(PO4)2 · 4H2O
Locality: Parker Mtn. Mine, Center Strafford, NH
Specimen Size: 8 mm field of view (top photo). Scaly golden-bronze colored metaswitzerite on triphylite
Field Collected: Gene Bearss - 1979
Owner: Tom Mortimer
Catalog No.: u1786
Analysis: A carbon tape mounted grain EDS analysis (BC36) showed only P, Mn, O and a bit of Fe.
Notes: The Bearss label with the specimen suggests metaswitzerite for this mineral. The chemistry indicated by the EDS spectrum is consistant with metaswitzerite with a bit of Fe substitution for some Mn. Mindat photos of metaswitzerite from The Foote Lithium Mine in North Carolina compare favorably with this specimen.
Confidence: 4
Chemistry: Mn+2Zn2(PO4)2(H2O2)4
Locality: Palermo Mine, N. Groton, NH
Specimen Size: 3 mm field of view
Field Collected - Owner: Bob Wilken
Analysis: The nizamoffite identification is suggested by EDS analysis 9/14/16.
Notes: The sodium response (not present in the described nizamoffite chemistry) is likely a miss-identification by the EDS element assignment software. Zn and Na have strong peaks separated by only 29 eV.
[tm] I question the EDS software assignment of sodium within the Zn-Na peak. Zn has two peaks in this area, one at 1.012 KeV and one at 1.035 KeV. Sodium has a strong peak at 1.041 KeV. The resolution of the instrument is 125 eV (0.125 KeV).
Locality: Palermo Mine, N. Groton, NH
Specimen Size: 0.5 mm nizamoffite crystal
Field Collected - Owner: Bob Wilken
Notes:
Confidence: 3
Chemistry: (Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2O
Locality: Palermo Mine, N. Groton, NH
Specimen Size: 4 mm field of view
Field Collected: Forrest Fogg
Owner: Tom Mortimer
Catalog No.: u1475
Analysis: Qualitative EDS analysis suggests this is likely a member of the overite mineral group, perhaps manganosegelerite
Notes: From material collected by Forrest Fogg in the 1970's, forwarded to me by Gordon Jackson. The color is about right based on the mindat photo for this species. No overite group minerals have been reported from Palermo. A quantitative EDS with Atomic %'s and good light element resolution would be helpful on this specimen.