[Rockhounds] This 'wandering meatloaf' chiton has a rare mineral in its teeth

[Drew]

I was just pointing out why no hardness value could be found in literature.
Because it wasn't measured.

There are specimens available on eBay for anyone who wants to add to the
literature.

Drew



On Sun, Jun 13, 2021, 19:15 Peter Richards <rpr at heidelberg.edu> wrote:

> The density of the teeth is essentially irrelevant.  Gold has a density of
> 15 to 19, and mercury a density of 13.6.  Neither would make good rasping
> teeth.
>
> Pete Richards
> ___________________________
> R. Peter Richards, Ph.D.
> rpr at heidelberg.edu
> Morphological Crystallographer
>
> > On Jun 13, 2021, at 6:32 PM, Drew <dr00bert at gmail.com> wrote:
> >
> > "The hardness was not measured but the measured density of the type
> > material is 2.42 g/cm3."
> >
> >
> https://www.schweizerbart.de/papers/ejm/detail/15/54934/Santabarbaraite_a_new_amorphous_phosphate_mineral?af=crossref
> >
> > On Tue, Jun 1, 2021 at 9:37 AM THE HAMMER <hammerron at hotmail.com> wrote:
> >
> >> Santabarbaraite is new to me.  I did several internet searches for more
> >> information and one thing that I found odd is that I could find no
> mention
> >> to its hardness.
> >>
> >> Ron
> >>
> >>
> >>
> >> ________________________________
> >> From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> on behalf
> of
> >> Kreigh Tomaszewski <kreigh at gmail.com>
> >> Sent: Monday, May 31, 2021 4:16 PM
> >> To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
> <
> >> rockhounds at rockhounds.drizzle.com>
> >> Subject: [Rockhounds] This 'wandering meatloaf' chiton has a rare
> mineral
> >> in its teeth
> >>
> >> A rare iron mineral has been discovered in the teeth of a living
> organism
> >> for the first time -- one that bears the pet name "wandering meatloaf."
> >> While it sounds like a tour update for the musician Meat Loaf, this
> >> research concerns a large mollusk called a chiton (not a "bat out of
> >> hell"). The mollusk, also known as Cryptochiton stelleri, got its
> nickname
> >> because it's large, reddish-brown and, well, shaped a bit like a
> meatloaf
> >> escaping the pan. It lives along rocky coastlines. The largest chiton in
> >> the world, it can reach 13 inches in length.
> >> Researchers were surprised to find santabarbaraite in the mollusk's
> tooth
> >> because it's previously been found only in rocks.
> >>
> >>
> >> Chiton need tough teeth because they essentially chew on rocks to scrape
> >> off algae and other food substances. Their teeth are one of the hardest
> >> materials in nature and are attached to a flexible tongue-like structure
> >> called a radula.
> >>
> >>
> https://www.cnn.com/2021/05/31/world/rare-mineral-chiton-mollusk-teeth-scn/index.html
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