Rare and Uncommon New Hampshire Mineral Species                Return to front page.           Click on image for larger view
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PERHAMITE    Palermo Mine, N. Groton, NH
10 mm field of view. Perhamite balls on quartz crystal termination.
Species:           PERHAMITE  
Confidence:     5
Chemistry:      Ca3Al7.7Si3P4O23.5 · 8 H2O
Locality:          Palermo Mine, N. Groton, NH
Specimen Size: 10 mm field of view. Perhamite balls on quartz crystal termination.
Field Collected: Gene Bearss - 1992
Catalog No.: u1588
Analysis: A November, 2014 EDS analysis indicated the species to be goyazite, (note the strong Sr response). However, multiple follow-on EDS analyses and an XRD analysis revealed the Sr peak was really a silicon peak, so species is perhamite.
A presentation describing the determination of perhamite is included here:
Perhamite Identification (pdf)
Notes: Literature tells us perhamite is structurally related to to crandallite. Goyazite is the strontium analog of crandallite. Gene had this labeled as "Crandallite ?".
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PERHAMITE    Palermo Mine, N. Groton, NH
1.2 mm perhamite cluster on quartz.
Species:           PERHAMITE  
Locality:          Palermo Mine, N. Groton, NH
Specimen Size: 1.2 mm perhamite cluster on quartz.
Field Collected: Gene Bearss - 1992
Catalog No.: u1588
Analysis:
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PERLOFFITE    Palermo Mine, N. Groton, NH
8 mm field of view
Species:           PERLOFFITE  
Confidence:     4
Chemistry:      Ba(Mn2+,Fe2+)2Fe23+(PO4)3(OH)3
Locality:          Palermo Mine, N. Groton, NH
Specimen Size: 8 mm field of view
Field Collected: From a tub of Palermo rocks gifted by Bob Whitmore
Catalog No.: u2062
Analysis: Multiple polished grain probings (BC122) ( EDS analysis1,    EDS analysis2 ) indicate the most likely species is perloffite. The analyses indicate a few elements (Ti, Ce, Zr) that are likely miss-assignments by the instrument element peak association software.
Notes: Perloffite has not previously been reported from the Palermo Mine.
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PHARMACOSIDERITE    Oliver Trench, Moat Mtn., Hale's Location, NH
2.5 mm field of view. Yellow-green microcrystaline pharmacosiderite in small arsenopyrite vug


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PHARMACOSIDERITE    Oliver Trench, Moat Mtn., Hale's Location, NH
2.5 mm field of view. Yellow-green microcrystaline pharmacosiderite in small arsenopyrite vug


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PHARMACOSIDERITE    Oliver Trench, Moat Mtn., Hale's Location, NH
SEM back scatter image
Species:           PHARMACOSIDERITE  
Confidence:     5
Chemistry:      KFe3+4(AsO4)3(OH)4 · 6-7 H2O
Locality:         Oliver Trench, Moat Mtn., Hale's Location, NH
Specimen Size: 2.5 mm field of view. Yellow-green microcrystaline pharmacosiderite in small arsenopyrite vug. Second view shows complete 12 mm specimen in inch & one-eighth micro-box. Red arrow points to pharmacosiderite zone.
Field Collected: Bob Janules
Owner: Tom Mortimer
Catalog No.: TBC
Notes: EDS analyzed, #BJ0068, J. Nizamoff, Aug, 2003. The largest crystals are about 0.03 mm, below what I can resolve with my photo equipment. The cubic habit of the pharmacosiderite crystals shows clearly in the SEM backscatter image. This image contains the area of the trogerite crystal plate, but it is mostly invisible. It is just to the left of the black dot in the center-left of the image - a small blue-white reflection.
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PLUMBOGUMMITE    Plume Mine, N. Groton, NH
1.2 mm fov with the larger mass (on left side) is 0.5 mm.
Species:           PLUMBOGUMMITE  
Confidence:     5
Chemistry:      PbAl3(PO4)2(OH)5·H2O
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 1.2 mm fov with the larger mass (on left side) is 0.5 mm.
Field Collected: Bob Wilken - Owner
Analysis: An EDS analysis of these small crystals indicated plumbogummite. The Si, Ca, and Fe peaks are suspected to be due to surface contamination. A polished grain analysis is needed.
Notes:
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PLUMBOGUMMITE    Plume Mine, N. Groton, NH
Irregular 2.0 mm plumbogummite xl mass
Species:           PLUMBOGUMMITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 2.0 mm plumbogummite xl mass & zoom view
Field Collected - Owner: Bob Wilken
Notes: Found in the small amount of clean white albitized smaller crystallized pegmatite along w. Childrenite et al. A lead phosphate.
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PLUMBOGUMMITE    Plume Mine, N. Groton, NH
Irregular 2.0 mm plumbogummite xl mass
Species:           PLUMBOGUMMITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 2.0 mm Plumbogummite xl mass. (Top photo). Two views
Field Collected - Owner: Bob Wilken
Notes: Characteristic appears to be a swept-back and apart. There is a sense of motion present.
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PLUMBOGUMMITE    Plume Mine, N. Groton, NH
Irregular 2.0 mm plumbogummite xl mass
Species:           PLUMBOGUMMITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 2.0 mm Plumbogummite mass.
Field Collected - Owner: Bob Wilken
Notes:
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PLUMBOGUMMITE    Plume Mine, N. Groton, NH
1.7 mm Plumbogummite mass.
Species:           PLUMBOGUMMITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 1.7 mm Plumbogummite mass.
Field Collected - Owner: Bob Wilken
Notes: This may be Greifensteinite Group.
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PLUMBOGUMMITE    Plume Mine, N. Groton, NH
4.0 mm long Plumbogummite mass.
Species:           PLUMBOGUMMITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 4.0 mm long Plumbogummite mass.
Field Collected - Owner: Bob Wilken
Notes:
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PLUMBOGUMMITE    Plume Mine, N. Groton, NH
2.6 mm fov Plumbogummite "brooms."
Species:           PLUMBOGUMMITE  
Locality:          Plume Mine, N. Groton, NH
Specimen Size: 2.6 mm fov Plumbogummite "brooms."
Field Collected - Owner: Bob Wilken
Notes:
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POLLUCITE ?    Parker Mtn. Mine, Center Strafford, NH
5.5 cm specimen, daylight


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POLLUCITE ?    Parker Mtn. Mine, Center Strafford, NH
5.5 cm specimen, SW UV
Species:           POLLUCITE ?  
Confidence:     2
Chemistry:      (Cs,Na)2(Al2Si4O12)·2H2O
Locality:          Parker Mtn. Mine, Center Strafford, NH
Specimen Size: 5.5 cm specimen, daylight and SW UV
Field Collected: Gene Bearss
Catalog No.: 2028
Notes: A polished grain, standardless, quantative EDS analysis (three probings) showed a Cs, Al silicate with a Al:Si:Cs ratio of 1:2:0.2 , very low cesium for pollucite. One result also showed small amounts of Na and K (perhaps a perthite inclusion?). Pollucite is not reported as fluorescent. No uranium was detected with a sensitive scintillometer and no autunite flakes could be seen under the microscope. Pollucite has not been previously reported from the Parker Mtn. Mine. A field collector would likely only find this with a UV lamp when night-time collecting. A candidate for XRD. [tm] I did send of a sample for XRD, but the small quantity of my sample gave an inconclusive result. A retry is planned.
Additional research: I now believe that the occurrence of petalite at the Parker Mtn. Mine is in error. The evidence is that the discovered species was pollucite, not petalite. The error originated in a disclosure in the December 1982 Southeastern New Hampshire Mineral Club newslettter Granite Chips wherein it was reported on page 2 that "Roland Bonney ... had picked up substantial quantities of a white mineral with occasional pink areas. He had this checked and it was found to be petalite, the only cesium [tm emphasis] mineral thus found there. It is quite common on the dump and has probably been overlooked as altering feldspar."
The error is that petalite does NOT contain cesium, where-as another white pegmatite mineral, pollucite, DOES!
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REALGAR-ORPIMENT    Parker Mtn. Mine, Center Strafford, NH
1 mm field of view. Crusty mass of orpiment-realgar
Species:           REALGAR-ORPIMENT  
Confidence:     4
Chemistry:      Realgar: As4S4 , Orpiment: As2S3
Locality:          Parker Mtn. Mine, Center Strafford, NH
Specimen Size: 1 mm field of view. Crusty mass of orpiment-realgar
Field Collected: Phillip Foster
Owner: Tom Mortimer
Catalog No.: 2063 Ex. Phillip Foster micro collection (#26.10=1)
Notes: An article in the December, 1982 issue of "Granite Chips" newsletter of the Southeastern New Hampshire Mineral Club by Phillip Foster reports a find of two "pin-head" sized occurrences of orpiment-realgar from Parker Mtn. This is likely one of those specimens. Harvard examined the specimen, but was non-committal and indicated the sample was too small for analysis. Gunnar Bjareby opined a possible realgar-orpiment ID. The elements in realgar/orpiment are arsenic and sulfur, both of these are present at Parker. I [tm] had discounted a realgar-orpiment occurrence at Parker as "folklore." The matrix for this small crusty bleb is triphylite-ferrisicklerite and appears quite legitmate for a Parker Mtn. piece. An EDS analysis is unlikely due to minimal size of this only known specimen.
A Parker Mtn. Mine species list authored by Art Smith, Rocks & Minerals, July/Aug, 2005, pg. 256, includes orpiment. This Art Smith list is likely responsible for the inclusion of orpiment in mindat.org's Parker Mtn. Mine species list (2015).
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RITTMANNITE   Chandlers Mill Mine, Newport, NH
6 mm field of view

Species:           RITTMANNITE
Confidence:     3
Chemistry:      {(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2·8H2O
Locality:          Chandlers Mill Mine, Newport, NH
Specimen Size: ~ 2 mm field of view
Field Collected: Bob Wilken - 2009
Catalog No.: A Bob Wilken specimen
Notes: A polished grain, semi quantative, EDS analysis (CHM02) gave a chemistry of Mn1.8Ca0.3Fe2Al3.4P4O21.4 (normalized for 4 phosophorus). The best fit for this chemistry is rittmannite. The form and color of these Chandlers Mill crystals are compatable with several photos of this species on mindat.org.
[tm] The IMA chemistry for rittmannite is one of the most complicated I have seen!
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SANIDINE    Streamside Drive residential construction site, Hooksett-Manchester town line, NH
9 mm field of view. Tabular sanidine crystals in rhyolite matrix.
Species:           SANIDINE  
Confidence:     5
Chemistry:      K(AlSiO8)
Locality:          Streamside Drive residential construction site, Hooksett-Manchester town line, NH
Specimen Size: 9 mm field of view. Tabular sanidine crystals (most on edge) in rhyolite matrix.
Field Collected: Tom Mortimer - 4/17/05
Catalog No.: 2000
Analysis: Sanidine indicated by EDS analysis, BC59. The Sr is a miss-assignment by the element association software. The composition indicated by the EDS analysis is:   K0.44Na0.38AlSi2.99O6.67   (Normalized for one Al)
The analysis shows a K-Na alkaline feldspar, potassium dominant. The Na content is a bit high and the K content is a bit low when compared to the webmineral reference analysis for sanidine included in the linked analysis page.
Notes: The crystals are very homogeneous with no evidence of perthitic layering. The rhyolite matrix is appropriate for sanidine crystals.
Sanidine is an IMA valid species. It has not appeared on historical NH mineral species lists, (e.g. Cares, Rocks and Minerals vol. 65, No. 4, pgs 298-299, nor on mindat.org's New Hampshire list.) NH sanidine crystals have been noted in several geologic reports, (e.g. McHone & Sundine, 1995, "Mesozoic Igneous Rocks in Southeastern New Hampshire", http://earth2geologists.net/Publications/McHone_Sundeen_NEIGC95.PDF)
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SIGLOITE    Chickering Mine, Walpole, NH
0.5 mm sigloite cluster


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SIGLOITE    Chickering Mine, Walpole, NH
0.5 mm sigloite cluster
Species:           SIGLOITE  
Confidence:     4
Chemistry:      Fe3+Al2(PO4)2(OH)3 · 7H2O
Locality:          Chickering Mine, Walpole, NH
Specimen Size: 0.5 mm sigloite cluster. Individual crystals on the order of 0.1 mm.
Field Collected: Tom Mortimer - Owner
Catalog No.: u1336
Analysis: EDS analysis indicated the species is a member of the stewartite group, sigloite being the best fit. with moderate Mn substitution.
Notes: The morphology of these crystals are a good match with the specimen examples shown on mindat.
Two photos, both with Canon G9 camera: top photo with Meiji trinocular scope, bottom photo with Nikon Plan 10/0.25 objective lens, (better) .
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